From 62f3b8914a1d3dfbb1f4a64c41adba56957663d5 Mon Sep 17 00:00:00 2001
From: Maribeth Moffatt <maribethb@google.com>
Date: Wed, 6 Aug 2025 17:01:59 -0400
Subject: [PATCH 01/52] chore: add tests for clipboard (#9254)

* chore: add tests for clipboard

* chore: clean up
---
 tests/browser/test/clipboard_test.mjs | 611 ++++++++++++++++++++++++++
 tests/browser/test/test_setup.mjs     |  28 ++
 2 files changed, 639 insertions(+)
 create mode 100644 tests/browser/test/clipboard_test.mjs

diff --git a/tests/browser/test/clipboard_test.mjs b/tests/browser/test/clipboard_test.mjs
new file mode 100644
index 00000000000..37dd359d3b9
--- /dev/null
+++ b/tests/browser/test/clipboard_test.mjs
@@ -0,0 +1,611 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as chai from 'chai';
+import {Key} from 'webdriverio';
+import {
+  PAUSE_TIME,
+  clickWorkspace,
+  focusOnBlock,
+  getAllBlocks,
+  getBlockTypeFromWorkspace,
+  getCategory,
+  getSelectedBlockId,
+  getSelectedBlockType,
+  openMutatorForBlock,
+  testFileLocations,
+  testSetup,
+} from './test_setup.mjs';
+
+const testBlockJson = {
+  'blocks': {
+    'languageVersion': 0,
+    'blocks': [
+      {
+        'type': 'controls_repeat_ext',
+        'id': 'controls_repeat_1',
+        'x': 88,
+        'y': 88,
+        'inputs': {
+          'TIMES': {
+            'shadow': {
+              'type': 'math_number',
+              'id': 'math_number_shadow_1',
+              'fields': {
+                'NUM': 10,
+              },
+            },
+          },
+          'DO': {
+            'block': {
+              'type': 'controls_if',
+              'id': 'controls_if_1',
+              'inputs': {
+                'IF0': {
+                  'block': {
+                    'type': 'logic_boolean',
+                    'id': 'logic_boolean_1',
+                    'fields': {
+                      'BOOL': 'TRUE',
+                    },
+                  },
+                },
+                'DO0': {
+                  'block': {
+                    'type': 'text_print',
+                    'id': 'text_print_1',
+                    'inputs': {
+                      'TEXT': {
+                        'shadow': {
+                          'type': 'text',
+                          'id': 'text_shadow_1',
+                          'fields': {
+                            'TEXT': 'abc',
+                          },
+                        },
+                      },
+                    },
+                  },
+                },
+              },
+            },
+          },
+        },
+      },
+    ],
+  },
+};
+
+async function loadStartBlocks(browser) {
+  await browser.execute((stringifiedJson) => {
+    // Hangs forever if the json isn't stringified ¯\_(ツ)_/¯
+    const testBlockJson = JSON.parse(stringifiedJson);
+    const workspace = Blockly.common.getMainWorkspace();
+    Blockly.serialization.workspaces.load(testBlockJson, workspace);
+  }, JSON.stringify(testBlockJson));
+  await browser.pause(PAUSE_TIME);
+}
+
+suite('Clipboard test', async function () {
+  // Setting timeout to unlimited as these tests take longer time to run
+  this.timeout(0);
+
+  // Clear the workspace and load start blocks
+  setup(async function () {
+    this.browser = await testSetup(testFileLocations.PLAYGROUND);
+    await this.browser.pause(PAUSE_TIME);
+  });
+
+  test('Paste block to/from main workspace', async function () {
+    await loadStartBlocks(this.browser);
+    // Select and copy the "true" block
+    await focusOnBlock(this.browser, 'logic_boolean_1');
+    await this.browser.pause(PAUSE_TIME);
+
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check how many blocks there are before pasting
+    const allBlocksBeforePaste = await getAllBlocks(this.browser);
+
+    // Paste the block while still in the main workspace
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check result
+    const allBlocksAfterPaste = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocksAfterPaste.length,
+      allBlocksBeforePaste.length + 1,
+      'Expected there to be one additional block after paste',
+    );
+    const focusedBlockId = await getSelectedBlockId(this.browser);
+    chai.assert.notEqual(
+      focusedBlockId,
+      'logic_boolean_1',
+      'Newly pasted block should be selected',
+    );
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'logic_boolean',
+      'Newly pasted block should be selected',
+    );
+  });
+
+  test('Copying a block also copies and pastes its children', async function () {
+    await loadStartBlocks(this.browser);
+    // Select and copy the "if/else" block which has children
+    await focusOnBlock(this.browser, 'controls_if_1');
+    await this.browser.pause(PAUSE_TIME);
+
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check how many blocks there are before pasting
+    const allBlocksBeforePaste = await getAllBlocks(this.browser);
+
+    // Paste the block while still in the main workspace
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check result
+    const allBlocksAfterPaste = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocksAfterPaste.length,
+      allBlocksBeforePaste.length + 4,
+      'Expected there to be four additional blocks after paste',
+    );
+  });
+
+  test('Paste shadow block to/from main workspace', async function () {
+    await loadStartBlocks(this.browser);
+    // Select and copy the shadow number block
+    await focusOnBlock(this.browser, 'math_number_shadow_1');
+    await this.browser.pause(PAUSE_TIME);
+
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check how many blocks there are before pasting
+    const allBlocksBeforePaste = await getAllBlocks(this.browser);
+
+    // Paste the block while still in the main workspace
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check result
+    const allBlocksAfterPaste = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocksAfterPaste.length,
+      allBlocksBeforePaste.length + 1,
+      'Expected there to be one additional block after paste',
+    );
+    const focusedBlockId = await getSelectedBlockId(this.browser);
+    chai.assert.notEqual(
+      focusedBlockId,
+      'math_number_shadow_1',
+      'Newly pasted block should be selected',
+    );
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'math_number',
+      'Newly pasted block should be selected',
+    );
+    const focusedBlockIsShadow = await this.browser.execute(() => {
+      return Blockly.common.getSelected().isShadow();
+    });
+    chai.assert.isFalse(
+      focusedBlockIsShadow,
+      'Expected the pasted version of the block to not be a shadow block',
+    );
+  });
+
+  test('Copy block from flyout, paste to main workspace', async function () {
+    // Open flyout
+    await getCategory(this.browser, 'Logic').then((category) =>
+      category.click(),
+    );
+
+    // Focus on first block in flyout
+    await this.browser.execute(() => {
+      const ws = Blockly.getMainWorkspace().getFlyout().getWorkspace();
+      const block = ws.getBlocksByType('controls_if')[0];
+      Blockly.getFocusManager().focusNode(block);
+    });
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Select the main workspace
+    await clickWorkspace(this.browser);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that the block is now on the workspace and selected
+    const allBlocks = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocks.length,
+      1,
+      'Expected there to be one block on main workspace after paste from flyout',
+    );
+
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'controls_if',
+      'Newly pasted block should be selected',
+    );
+  });
+
+  test('Copy block from flyout, paste while flyout focused', async function () {
+    // Open flyout
+    await getCategory(this.browser, 'Logic').then((category) =>
+      category.click(),
+    );
+
+    // Focus on first block in flyout
+    await this.browser.execute(() => {
+      const ws = Blockly.getMainWorkspace().getFlyout().getWorkspace();
+      const block = ws.getBlocksByType('controls_if')[0];
+      Blockly.getFocusManager().focusNode(block);
+    });
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that the flyout is closed
+    const flyoutIsVisible = await this.browser
+      .$('.blocklyToolboxFlyout')
+      .then((elem) => elem.isDisplayed());
+    chai.assert.isFalse(flyoutIsVisible, 'Expected flyout to not be open');
+
+    // Check that the block is now on the main workspace and selected
+    const allBlocks = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocks.length,
+      1,
+      'Expected there to be one block on main workspace after paste from flyout',
+    );
+
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'controls_if',
+      'Newly pasted block should be selected',
+    );
+  });
+
+  test('Copy block from mutator flyout, paste to mutator workspace', async function () {
+    // Load the start blocks
+    await loadStartBlocks(this.browser);
+
+    // Open the controls_if mutator
+    const block = await getBlockTypeFromWorkspace(
+      this.browser,
+      'controls_if',
+      0,
+    );
+    await openMutatorForBlock(this.browser, block);
+
+    // Select the first block in the mutator flyout
+    await this.browser.execute(
+      (blockId, mutatorBlockType) => {
+        const flyoutBlock = Blockly.getMainWorkspace()
+          .getBlockById(blockId)
+          .mutator.getWorkspace()
+          .getFlyout()
+          .getWorkspace()
+          .getBlocksByType(mutatorBlockType)[0];
+
+        Blockly.getFocusManager().focusNode(flyoutBlock);
+      },
+      'controls_if_1',
+      'controls_if_elseif',
+    );
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that the block is now in the mutator workspace and selected
+    const numberOfIfElseBlocks = await this.browser.execute(
+      (blockId, mutatorBlockType) => {
+        return Blockly.getMainWorkspace()
+          .getBlockById(blockId)
+          .mutator.getWorkspace()
+          .getBlocksByType(mutatorBlockType).length;
+      },
+      'controls_if_1',
+      'controls_if_elseif',
+    );
+
+    chai.assert.equal(
+      numberOfIfElseBlocks,
+      1,
+      'Expected there to be one if_else block in mutator workspace',
+    );
+
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'controls_if_elseif',
+      'Newly pasted block should be selected',
+    );
+  });
+
+  test('Copy block from mutator flyout, paste to main workspace while mutator open', async function () {
+    // Load the start blocks
+    await loadStartBlocks(this.browser);
+
+    // Open the controls_if mutator
+    const block = await getBlockTypeFromWorkspace(
+      this.browser,
+      'controls_if',
+      0,
+    );
+    await openMutatorForBlock(this.browser, block);
+
+    // Select the first block in the mutator flyout
+    await this.browser.execute(
+      (blockId, mutatorBlockType) => {
+        const flyoutBlock = Blockly.getMainWorkspace()
+          .getBlockById(blockId)
+          .mutator.getWorkspace()
+          .getFlyout()
+          .getWorkspace()
+          .getBlocksByType(mutatorBlockType)[0];
+
+        Blockly.getFocusManager().focusNode(flyoutBlock);
+      },
+      'controls_if_1',
+      'controls_if_elseif',
+    );
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Click the main workspace
+    await clickWorkspace(this.browser);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that the block is now in the mutator workspace and selected
+    const numberOfIfElseBlocks = await this.browser.execute(
+      (blockId, mutatorBlockType) => {
+        return Blockly.getMainWorkspace()
+          .getBlockById(blockId)
+          .mutator.getWorkspace()
+          .getBlocksByType(mutatorBlockType).length;
+      },
+      'controls_if_1',
+      'controls_if_elseif',
+    );
+
+    chai.assert.equal(
+      numberOfIfElseBlocks,
+      1,
+      'Expected there to be one if_else block in mutator workspace',
+    );
+
+    const focusedBlockType = await getSelectedBlockType(this.browser);
+    chai.assert.equal(
+      focusedBlockType,
+      'controls_if_elseif',
+      'Newly pasted block should be selected',
+    );
+
+    // Check that there are no new blocks on the main workspace
+    const numberOfIfElseBlocksOnMainWorkspace = await this.browser.execute(
+      (mutatorBlockType) => {
+        return Blockly.getMainWorkspace().getBlocksByType(mutatorBlockType)
+          .length;
+      },
+      'controls_if_elseif',
+    );
+    chai.assert.equal(
+      numberOfIfElseBlocksOnMainWorkspace,
+      0,
+      'Mutator blocks should not appear on main workspace',
+    );
+  });
+
+  test('Copy block from mutator flyout, paste to main workspace while mutator closed', async function () {
+    // Load the start blocks
+    await loadStartBlocks(this.browser);
+
+    // Open the controls_if mutator
+    const block = await getBlockTypeFromWorkspace(
+      this.browser,
+      'controls_if',
+      0,
+    );
+    await openMutatorForBlock(this.browser, block);
+
+    // Select the first block in the mutator flyout
+    await this.browser.execute(
+      (blockId, mutatorBlockType) => {
+        const flyoutBlock = Blockly.getMainWorkspace()
+          .getBlockById(blockId)
+          .mutator.getWorkspace()
+          .getFlyout()
+          .getWorkspace()
+          .getBlocksByType(mutatorBlockType)[0];
+
+        Blockly.getFocusManager().focusNode(flyoutBlock);
+      },
+      'controls_if_1',
+      'controls_if_elseif',
+    );
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Close the mutator flyout (calling this method on open mutator closes it)
+    await openMutatorForBlock(this.browser, block);
+
+    // Click the main workspace
+    await clickWorkspace(this.browser);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that there are no new blocks on the main workspace
+    const numberOfIfElseBlocksOnMainWorkspace = await this.browser.execute(
+      (mutatorBlockType) => {
+        return Blockly.getMainWorkspace().getBlocksByType(mutatorBlockType)
+          .length;
+      },
+      'controls_if_elseif',
+    );
+    chai.assert.equal(
+      numberOfIfElseBlocksOnMainWorkspace,
+      0,
+      'Mutator blocks should not appear on main workspace',
+    );
+  });
+
+  test('Copy workspace comment, paste to main workspace', async function () {
+    // Add a workspace comment to the workspace
+    await this.browser.execute(() => {
+      const workspace = Blockly.getMainWorkspace();
+      const json = {
+        'workspaceComments': [
+          {
+            'height': 100,
+            'width': 120,
+            'id': 'workspace_comment_1',
+            'x': 13,
+            'y': -12,
+            'text': 'This is a comment',
+          },
+        ],
+      };
+      Blockly.serialization.workspaces.load(json, workspace);
+    });
+    await this.browser.pause(PAUSE_TIME);
+
+    // Select the workspace comment
+    await this.browser.execute(() => {
+      const comment = Blockly.getMainWorkspace().getCommentById(
+        'workspace_comment_1',
+      );
+      Blockly.getFocusManager().focusNode(comment);
+    });
+    await this.browser.pause(PAUSE_TIME);
+
+    // Copy
+    await this.browser.keys([Key.Ctrl, 'c']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Click the main workspace
+    await clickWorkspace(this.browser);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that there are 2 comments on the workspace
+    const numberOfComments = await this.browser.execute(() => {
+      return Blockly.getMainWorkspace().getTopComments().length;
+    });
+    chai.assert.equal(
+      numberOfComments,
+      2,
+      'Expected 2 workspace comments after pasting',
+    );
+  });
+
+  test('Cut block from main workspace, paste to main workspace', async function () {
+    await loadStartBlocks(this.browser);
+    // Select and cut the "true" block
+    await focusOnBlock(this.browser, 'logic_boolean_1');
+    await this.browser.pause(PAUSE_TIME);
+
+    await this.browser.keys([Key.Ctrl, 'x']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that the "true" block was deleted
+    const trueBlock = await this.browser.execute(() => {
+      return Blockly.getMainWorkspace().getBlockById('logic_boolean_1') ?? null;
+    });
+    chai.assert.isNull(trueBlock);
+
+    // Check how many blocks there are before pasting
+    const allBlocksBeforePaste = await getAllBlocks(this.browser);
+
+    // Paste the block while still in the main workspace
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check result
+    const allBlocksAfterPaste = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocksAfterPaste.length,
+      allBlocksBeforePaste.length + 1,
+      'Expected there to be one additional block after paste',
+    );
+  });
+
+  test('Cannot cut block from flyout', async function () {
+    // Open flyout
+    await getCategory(this.browser, 'Logic').then((category) =>
+      category.click(),
+    );
+
+    // Focus on first block in flyout
+    await this.browser.execute(() => {
+      const ws = Blockly.getMainWorkspace().getFlyout().getWorkspace();
+      const block = ws.getBlocksByType('controls_if')[0];
+      Blockly.getFocusManager().focusNode(block);
+    });
+    await this.browser.pause(PAUSE_TIME);
+
+    // Cut
+    await this.browser.keys([Key.Ctrl, 'x']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Select the main workspace
+    await clickWorkspace(this.browser);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Paste
+    await this.browser.keys([Key.Ctrl, 'v']);
+    await this.browser.pause(PAUSE_TIME);
+
+    // Check that no block was pasted
+    const allBlocks = await getAllBlocks(this.browser);
+    chai.assert.equal(
+      allBlocks.length,
+      0,
+      'Expected no blocks in the workspace because nothing to paste',
+    );
+  });
+});
diff --git a/tests/browser/test/test_setup.mjs b/tests/browser/test/test_setup.mjs
index 6cf4986fce5..0a8998c3efe 100644
--- a/tests/browser/test/test_setup.mjs
+++ b/tests/browser/test/test_setup.mjs
@@ -127,6 +127,23 @@ export const screenDirection = {
   LTR: 1,
 };
 
+/**
+ * Focuses and selects a block with the provided ID.
+ *
+ * This throws an error if no block exists for the specified ID.
+ *
+ * @param browser The active WebdriverIO Browser object.
+ * @param blockId The ID of the block to select.
+ */
+export async function focusOnBlock(browser, blockId) {
+  return await browser.execute((blockId) => {
+    const workspaceSvg = Blockly.getMainWorkspace();
+    const block = workspaceSvg.getBlockById(blockId);
+    if (!block) throw new Error(`No block found with ID: ${blockId}.`);
+    Blockly.getFocusManager().focusNode(block);
+  }, blockId);
+}
+
 /**
  * @param browser The active WebdriverIO Browser object.
  * @return A Promise that resolves to the ID of the currently selected block.
@@ -138,6 +155,17 @@ export async function getSelectedBlockId(browser) {
   });
 }
 
+/**
+ * @param browser The active WebdriverIO Browser object.
+ * @return A Promise that resolves to the ID of the currently selected block.
+ */
+export async function getSelectedBlockType(browser) {
+  return await browser.execute(() => {
+    // Note: selected is an ICopyable and I am assuming that it is a BlockSvg.
+    return Blockly.common.getSelected()?.type;
+  });
+}
+
 /**
  * @param browser The active WebdriverIO Browser object.
  * @return A Promise that resolves to the selected block's root SVG element,

From f9d0ec9d24d6ee78a0e4a52327dbd0e1688b7f1b Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 6 Aug 2025 14:04:12 -0700
Subject: [PATCH 02/52] refactor: Associate comment bar buttons with the
 comment view. (#9278)

---
 core/comments/collapse_comment_bar_button.ts     |  9 +++++----
 core/comments/comment_bar_button.ts              | 16 +++++-----------
 core/comments/comment_view.ts                    | 11 ++++++++---
 core/comments/delete_comment_bar_button.ts       |  6 ++++--
 .../comment_bar_button_navigation_policy.ts      |  8 +++++---
 core/keyboard_nav/line_cursor.ts                 | 13 +++++++++++--
 6 files changed, 38 insertions(+), 25 deletions(-)

diff --git a/core/comments/collapse_comment_bar_button.ts b/core/comments/collapse_comment_bar_button.ts
index b0738d70705..304e2af8125 100644
--- a/core/comments/collapse_comment_bar_button.ts
+++ b/core/comments/collapse_comment_bar_button.ts
@@ -10,6 +10,7 @@ import * as dom from '../utils/dom.js';
 import {Svg} from '../utils/svg.js';
 import type {WorkspaceSvg} from '../workspace_svg.js';
 import {CommentBarButton} from './comment_bar_button.js';
+import type {CommentView} from './comment_view.js';
 
 /**
  * Magic string appended to the comment ID to create a unique ID for this button.
@@ -42,8 +43,9 @@ export class CollapseCommentBarButton extends CommentBarButton {
     protected readonly id: string,
     protected readonly workspace: WorkspaceSvg,
     protected readonly container: SVGGElement,
+    protected readonly commentView: CommentView,
   ) {
-    super(id, workspace, container);
+    super(id, workspace, container, commentView);
 
     this.icon = dom.createSvgElement(
       Svg.IMAGE,
@@ -86,14 +88,13 @@ export class CollapseCommentBarButton extends CommentBarButton {
   override performAction(e?: Event) {
     touch.clearTouchIdentifier();
 
-    const comment = this.getParentComment();
-    comment.view.bringToFront();
+    this.getCommentView().bringToFront();
     if (e && e instanceof PointerEvent && browserEvents.isRightButton(e)) {
       e.stopPropagation();
       return;
     }
 
-    comment.setCollapsed(!comment.isCollapsed());
+    this.getCommentView().setCollapsed(!this.getCommentView().isCollapsed());
     this.workspace.hideChaff();
 
     e?.stopPropagation();
diff --git a/core/comments/comment_bar_button.ts b/core/comments/comment_bar_button.ts
index d78a7fd86a1..24a084ad26e 100644
--- a/core/comments/comment_bar_button.ts
+++ b/core/comments/comment_bar_button.ts
@@ -7,7 +7,7 @@
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import {Rect} from '../utils/rect.js';
 import type {WorkspaceSvg} from '../workspace_svg.js';
-import type {RenderedWorkspaceComment} from './rendered_workspace_comment.js';
+import type {CommentView} from './comment_view.js';
 
 /**
  * Button displayed on a comment's top bar.
@@ -29,6 +29,7 @@ export abstract class CommentBarButton implements IFocusableNode {
     protected readonly id: string,
     protected readonly workspace: WorkspaceSvg,
     protected readonly container: SVGGElement,
+    protected readonly commentView: CommentView,
   ) {}
 
   /**
@@ -39,17 +40,10 @@ export abstract class CommentBarButton implements IFocusableNode {
   }
 
   /**
-   * Returns the parent comment of this comment bar button.
+   * Returns the parent comment view of this comment bar button.
    */
-  getParentComment(): RenderedWorkspaceComment {
-    const comment = this.workspace.getCommentById(this.id);
-    if (!comment) {
-      throw new Error(
-        `Comment bar button ${this.id} has no corresponding comment`,
-      );
-    }
-
-    return comment;
+  getCommentView(): CommentView {
+    return this.commentView;
   }
 
   /** Adjusts the position of this button within its parent container. */
diff --git a/core/comments/comment_view.ts b/core/comments/comment_view.ts
index 936d746508f..ca0c261c390 100644
--- a/core/comments/comment_view.ts
+++ b/core/comments/comment_view.ts
@@ -102,7 +102,7 @@ export class CommentView implements IRenderedElement {
 
   constructor(
     readonly workspace: WorkspaceSvg,
-    private commentId: string,
+    readonly commentId: string,
   ) {
     this.svgRoot = dom.createSvgElement(Svg.G, {
       'class': 'blocklyComment blocklyEditable blocklyDraggable',
@@ -176,12 +176,18 @@ export class CommentView implements IRenderedElement {
       this.commentId,
       this.workspace,
       topBarGroup,
+      this,
     );
     const foldoutButton = new CollapseCommentBarButton(
       this.commentId,
       this.workspace,
       topBarGroup,
+      this,
     );
+    this.addDisposeListener(() => {
+      deleteButton.dispose();
+      foldoutButton.dispose();
+    });
     const textPreview = dom.createSvgElement(
       Svg.TEXT,
       {
@@ -612,13 +618,12 @@ export class CommentView implements IRenderedElement {
   /** Disposes of this comment view. */
   dispose() {
     this.disposing = true;
-    this.foldoutButton.dispose();
-    this.deleteButton.dispose();
     dom.removeNode(this.svgRoot);
     // Loop through listeners backwards in case they remove themselves.
     for (let i = this.disposeListeners.length - 1; i >= 0; i--) {
       this.disposeListeners[i]();
     }
+    this.disposeListeners.length = 0;
     this.disposed = true;
   }
 
diff --git a/core/comments/delete_comment_bar_button.ts b/core/comments/delete_comment_bar_button.ts
index 0b7dcd0ea27..c61db9b9cd2 100644
--- a/core/comments/delete_comment_bar_button.ts
+++ b/core/comments/delete_comment_bar_button.ts
@@ -11,6 +11,7 @@ import * as dom from '../utils/dom.js';
 import {Svg} from '../utils/svg.js';
 import type {WorkspaceSvg} from '../workspace_svg.js';
 import {CommentBarButton} from './comment_bar_button.js';
+import type {CommentView} from './comment_view.js';
 
 /**
  * Magic string appended to the comment ID to create a unique ID for this button.
@@ -42,8 +43,9 @@ export class DeleteCommentBarButton extends CommentBarButton {
     protected readonly id: string,
     protected readonly workspace: WorkspaceSvg,
     protected readonly container: SVGGElement,
+    protected readonly commentView: CommentView,
   ) {
-    super(id, workspace, container);
+    super(id, workspace, container, commentView);
 
     this.icon = dom.createSvgElement(
       Svg.IMAGE,
@@ -97,7 +99,7 @@ export class DeleteCommentBarButton extends CommentBarButton {
       return;
     }
 
-    this.getParentComment().dispose();
+    this.getCommentView().dispose();
     e?.stopPropagation();
     getFocusManager().focusNode(this.workspace);
   }
diff --git a/core/keyboard_nav/comment_bar_button_navigation_policy.ts b/core/keyboard_nav/comment_bar_button_navigation_policy.ts
index f676f465582..6654d2d8fef 100644
--- a/core/keyboard_nav/comment_bar_button_navigation_policy.ts
+++ b/core/keyboard_nav/comment_bar_button_navigation_policy.ts
@@ -31,7 +31,9 @@ export class CommentBarButtonNavigationPolicy
    * @returns The parent comment of the given CommentBarButton.
    */
   getParent(current: CommentBarButton): IFocusableNode | null {
-    return current.getParentComment();
+    return current
+      .getCommentView()
+      .workspace.getCommentById(current.getCommentView().commentId);
   }
 
   /**
@@ -41,7 +43,7 @@ export class CommentBarButtonNavigationPolicy
    * @returns The next CommentBarButton, if any.
    */
   getNextSibling(current: CommentBarButton): IFocusableNode | null {
-    const children = current.getParentComment().view.getCommentBarButtons();
+    const children = current.getCommentView().getCommentBarButtons();
     const currentIndex = children.indexOf(current);
     if (currentIndex >= 0 && currentIndex + 1 < children.length) {
       return children[currentIndex + 1];
@@ -56,7 +58,7 @@ export class CommentBarButtonNavigationPolicy
    * @returns The CommentBarButton's previous CommentBarButton, if any.
    */
   getPreviousSibling(current: CommentBarButton): IFocusableNode | null {
-    const children = current.getParentComment().view.getCommentBarButtons();
+    const children = current.getCommentView().getCommentBarButtons();
     const currentIndex = children.indexOf(current);
     if (currentIndex > 0) {
       return children[currentIndex - 1];
diff --git a/core/keyboard_nav/line_cursor.ts b/core/keyboard_nav/line_cursor.ts
index c621e3a89ef..13e5a729d0f 100644
--- a/core/keyboard_nav/line_cursor.ts
+++ b/core/keyboard_nav/line_cursor.ts
@@ -20,6 +20,7 @@ import {Field} from '../field.js';
 import {getFocusManager} from '../focus_manager.js';
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import * as registry from '../registry.js';
+import {Rect} from '../utils/rect.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
 import {Marker} from './marker.js';
 
@@ -405,8 +406,16 @@ export class LineCursor extends Marker {
     } else if (newNode instanceof RenderedWorkspaceComment) {
       newNode.workspace.scrollBoundsIntoView(newNode.getBoundingRectangle());
     } else if (newNode instanceof CommentBarButton) {
-      const comment = newNode.getParentComment();
-      comment.workspace.scrollBoundsIntoView(comment.getBoundingRectangle());
+      const commentView = newNode.getCommentView();
+      const xy = commentView.getRelativeToSurfaceXY();
+      const size = commentView.getSize();
+      const bounds = new Rect(
+        xy.y,
+        xy.y + size.height,
+        xy.x,
+        xy.x + size.width,
+      );
+      commentView.workspace.scrollBoundsIntoView(bounds);
     }
   }
 

From 7d1d745416621cc352c1048e6fb06c9f611cbcc4 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 6 Aug 2025 14:08:01 -0700
Subject: [PATCH 03/52] fix: Drag immovable and shadow blocks along with their
 parent. (#9281)

---
 core/block.ts             | 42 ++++++++++++++++++++++++---------------
 tests/mocha/block_test.js | 29 +++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 16 deletions(-)

diff --git a/core/block.ts b/core/block.ts
index 8ba61b1cac0..d15700a7e19 100644
--- a/core/block.ts
+++ b/core/block.ts
@@ -501,22 +501,32 @@ export class Block {
       // Detach this block from the parent's tree.
       this.previousConnection.disconnect();
     }
-    const nextBlock = this.getNextBlock();
-    if (opt_healStack && nextBlock && !nextBlock.isShadow()) {
-      // Disconnect the next statement.
-      const nextTarget = this.nextConnection?.targetConnection ?? null;
-      nextTarget?.disconnect();
-      if (
-        previousTarget &&
-        this.workspace.connectionChecker.canConnect(
-          previousTarget,
-          nextTarget,
-          false,
-        )
-      ) {
-        // Attach the next statement to the previous statement.
-        previousTarget.connect(nextTarget!);
-      }
+
+    if (!opt_healStack) return;
+
+    // Immovable or shadow next blocks need to move along with the block; keep
+    // going until we encounter a normal block or run off the end of the stack.
+    let nextBlock = this.getNextBlock();
+    while (nextBlock && (nextBlock.isShadow() || !nextBlock.isMovable())) {
+      nextBlock = nextBlock.getNextBlock();
+    }
+    if (!nextBlock) return;
+
+    // Disconnect the next statement.
+    const nextTarget =
+      nextBlock.previousConnection?.targetBlock()?.nextConnection
+        ?.targetConnection ?? null;
+    nextTarget?.disconnect();
+    if (
+      previousTarget &&
+      this.workspace.connectionChecker.canConnect(
+        previousTarget,
+        nextTarget,
+        false,
+      )
+    ) {
+      // Attach the next statement to the previous statement.
+      previousTarget.connect(nextTarget!);
     }
   }
 
diff --git a/tests/mocha/block_test.js b/tests/mocha/block_test.js
index 62c61ce004c..e3bd470902d 100644
--- a/tests/mocha/block_test.js
+++ b/tests/mocha/block_test.js
@@ -201,6 +201,35 @@ suite('Blocks', function () {
 
         assertUnpluggedHealFailed(blocks);
       });
+      test('Disconnect top of stack with immovable sibling', function () {
+        this.blocks.B.setMovable(false);
+        this.blocks.A.unplug(true);
+        assert.equal(this.blocks.A.nextConnection.targetBlock(), this.blocks.B);
+        assert.isNull(this.blocks.B.nextConnection.targetBlock());
+        assert.isNull(this.blocks.C.previousConnection.targetBlock());
+      });
+      test('Heal with immovable sibling mid-stack', function () {
+        const blockD = this.workspace.newBlock('stack_block', 'd');
+        this.blocks.C.nextConnection.connect(blockD.previousConnection);
+        this.blocks.C.setMovable(false);
+        this.blocks.B.unplug(true);
+        assert.equal(this.blocks.A.nextConnection.targetBlock(), blockD);
+        assert.equal(this.blocks.B.nextConnection.targetBlock(), this.blocks.C);
+        assert.isNull(this.blocks.C.nextConnection.targetBlock());
+      });
+      test('Heal with immovable sibling and shadow sibling mid-stack', function () {
+        const blockD = this.workspace.newBlock('stack_block', 'd');
+        const blockE = this.workspace.newBlock('stack_block', 'e');
+        this.blocks.C.nextConnection.connect(blockD.previousConnection);
+        blockD.nextConnection.connect(blockE.previousConnection);
+        this.blocks.C.setMovable(false);
+        blockD.setShadow(true);
+        this.blocks.B.unplug(true);
+        assert.equal(this.blocks.A.nextConnection.targetBlock(), blockE);
+        assert.equal(this.blocks.B.nextConnection.targetBlock(), this.blocks.C);
+        assert.equal(this.blocks.C.nextConnection.targetBlock(), blockD);
+        assert.isNull(blockD.nextConnection.targetBlock());
+      });
       test('Child is shadow', function () {
         const blocks = this.blocks;
         blocks.C.setShadow(true);

From 2e252a4bd80d376ab6b93524931e00d61e91683b Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 11 Aug 2025 09:38:45 -0700
Subject: [PATCH 04/52] chore(deps): bump
 google-github-actions/deploy-appengine (#9273)

Bumps [google-github-actions/deploy-appengine](https://github.com/google-github-actions/deploy-appengine) from 2.1.5 to 2.1.7.
- [Release notes](https://github.com/google-github-actions/deploy-appengine/releases)
- [Changelog](https://github.com/google-github-actions/deploy-appengine/blob/main/CHANGELOG.md)
- [Commits](https://github.com/google-github-actions/deploy-appengine/compare/v2.1.5...v2.1.7)

---
updated-dependencies:
- dependency-name: google-github-actions/deploy-appengine
  dependency-version: 2.1.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 .github/workflows/appengine_deploy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/appengine_deploy.yml b/.github/workflows/appengine_deploy.yml
index 1dd6d2ffa92..408c1b08476 100644
--- a/.github/workflows/appengine_deploy.yml
+++ b/.github/workflows/appengine_deploy.yml
@@ -42,7 +42,7 @@ jobs:
           path: _deploy/
 
       - name: Deploy to App Engine
-        uses: google-github-actions/deploy-appengine@v2.1.5
+        uses: google-github-actions/deploy-appengine@v2.1.7
         # For parameters see:
         # https://github.com/google-github-actions/deploy-appengine#inputs
         with:

From 79d314049558cd776062afcd389aef6c651f095f Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 11 Aug 2025 17:39:48 +0100
Subject: [PATCH 05/52] chore(deps): bump actions/download-artifact from 4 to 5
 (#9287)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 .github/workflows/appengine_deploy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/appengine_deploy.yml b/.github/workflows/appengine_deploy.yml
index 408c1b08476..50afec2407c 100644
--- a/.github/workflows/appengine_deploy.yml
+++ b/.github/workflows/appengine_deploy.yml
@@ -36,7 +36,7 @@ jobs:
     needs: prepare
     steps:
       - name: Download prepared files
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: appengine_files
           path: _deploy/

From b211c02e3cac05d37126f6024afc060509b5328b Mon Sep 17 00:00:00 2001
From: RoboErikG <RoboErikG@users.noreply.github.com>
Date: Mon, 11 Aug 2025 10:10:10 -0700
Subject: [PATCH 06/52] Change browser test timeout to 2 hours

---
 .github/workflows/browser_test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/browser_test.yml b/.github/workflows/browser_test.yml
index 3675af7b042..e670af9260f 100644
--- a/.github/workflows/browser_test.yml
+++ b/.github/workflows/browser_test.yml
@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   build:
-    timeout-minutes: 10
+    timeout-minutes: 120
     runs-on: ${{ matrix.os }}
 
     strategy:

From fb63360b9f7dc646293ea6419545ab5a8942a933 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 12 Aug 2025 08:55:54 -0700
Subject: [PATCH 07/52] refactor: Remove duplicated method from
 contextmenu_items.ts. (#9289)

---
 core/contextmenu_items.ts | 39 +++------------------------------------
 1 file changed, 3 insertions(+), 36 deletions(-)

diff --git a/core/contextmenu_items.ts b/core/contextmenu_items.ts
index 8bb71775fd7..001a3c58e25 100644
--- a/core/contextmenu_items.ts
+++ b/core/contextmenu_items.ts
@@ -23,6 +23,7 @@ import {CommentIcon} from './icons/comment_icon.js';
 import {Msg} from './msg.js';
 import {StatementInput} from './renderers/zelos/zelos.js';
 import {Coordinate} from './utils/coordinate.js';
+import * as svgMath from './utils/svg_math.js';
 import type {WorkspaceSvg} from './workspace_svg.js';
 
 function isFullBlockField(block?: BlockSvg) {
@@ -637,9 +638,9 @@ export function registerCommentCreate() {
       const comment = new RenderedWorkspaceComment(workspace);
       comment.setPlaceholderText(Msg['WORKSPACE_COMMENT_DEFAULT_TEXT']);
       comment.moveTo(
-        pixelsToWorkspaceCoords(
-          new Coordinate(location.x, location.y),
+        svgMath.screenToWsCoordinates(
           workspace,
+          new Coordinate(location.x, location.y),
         ),
       );
       getFocusManager().focusNode(comment);
@@ -652,40 +653,6 @@ export function registerCommentCreate() {
   ContextMenuRegistry.registry.register(createOption);
 }
 
-/**
- * Converts pixel coordinates (relative to the window) to workspace coordinates.
- */
-function pixelsToWorkspaceCoords(
-  pixelCoord: Coordinate,
-  workspace: WorkspaceSvg,
-): Coordinate {
-  const injectionDiv = workspace.getInjectionDiv();
-  // Bounding rect coordinates are in client coordinates, meaning that they
-  // are in pixels relative to the upper left corner of the visible browser
-  // window.  These coordinates change when you scroll the browser window.
-  const boundingRect = injectionDiv.getBoundingClientRect();
-
-  // The client coordinates offset by the injection div's upper left corner.
-  const clientOffsetPixels = new Coordinate(
-    pixelCoord.x - boundingRect.left,
-    pixelCoord.y - boundingRect.top,
-  );
-
-  // The offset in pixels between the main workspace's origin and the upper
-  // left corner of the injection div.
-  const mainOffsetPixels = workspace.getOriginOffsetInPixels();
-
-  // The position of the new comment in pixels relative to the origin of the
-  // main workspace.
-  const finalOffset = Coordinate.difference(
-    clientOffsetPixels,
-    mainOffsetPixels,
-  );
-  // The position of the new comment in main workspace coordinates.
-  finalOffset.scale(1 / workspace.scale);
-  return finalOffset;
-}
-
 /** Registers all block-scoped context menu items. */
 function registerBlockOptions_() {
   registerDuplicate();

From e74910c8a0b189fe01ac79d653008be0158e6374 Mon Sep 17 00:00:00 2001
From: RoboErikG <RoboErikG@users.noreply.github.com>
Date: Tue, 12 Aug 2025 10:32:32 -0700
Subject: [PATCH 08/52] Update block-test version

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 3535ae06da9..d674b8637c3 100644
--- a/package.json
+++ b/package.json
@@ -100,7 +100,7 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "@blockly/block-test": "^7.0.1",
+    "@blockly/block-test": "^7.0.2",
     "@blockly/dev-tools": "^9.0.0",
     "@blockly/theme-modern": "^7.0.1",
     "@hyperjump/browser": "^1.1.4",

From 4f4a450142923a9ba1f36c98836b549f556706f6 Mon Sep 17 00:00:00 2001
From: RoboErikG <RoboErikG@users.noreply.github.com>
Date: Wed, 13 Aug 2025 09:39:24 -0700
Subject: [PATCH 09/52] Update dev-tools version in package.json

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index d674b8637c3..e7a496b31f8 100644
--- a/package.json
+++ b/package.json
@@ -101,7 +101,7 @@
   "license": "Apache-2.0",
   "devDependencies": {
     "@blockly/block-test": "^7.0.2",
-    "@blockly/dev-tools": "^9.0.0",
+    "@blockly/dev-tools": "^9.0.2",
     "@blockly/theme-modern": "^7.0.1",
     "@hyperjump/browser": "^1.1.4",
     "@hyperjump/json-schema": "^1.5.0",

From 7b784b58c0192cb45aa4e62ef8df072e713238f8 Mon Sep 17 00:00:00 2001
From: RoboErikG <RoboErikG@users.noreply.github.com>
Date: Wed, 13 Aug 2025 11:06:10 -0700
Subject: [PATCH 10/52] Add a weekly schedule

---
 .github/workflows/browser_test.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/browser_test.yml b/.github/workflows/browser_test.yml
index e670af9260f..51ac0dffada 100644
--- a/.github/workflows/browser_test.yml
+++ b/.github/workflows/browser_test.yml
@@ -5,6 +5,8 @@ name: Run browser manually
 
 on:
   workflow_dispatch:
+  schedule:
+    - cron: '0 6 * * 1' # Runs every Monday at 06:00 UTC
 
 permissions:
   contents: read

From 34ea176b88ce1d3f242a6930f9a58859e1d4480c Mon Sep 17 00:00:00 2001
From: Erik Pasternak <epastern@google.com>
Date: Wed, 13 Aug 2025 18:14:01 +0000
Subject: [PATCH 11/52] Update package-lock.json

---
 package-lock.json | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index b1ff8dcbd8b..e03f6d24d46 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,8 +13,8 @@
         "jsdom": "26.1.0"
       },
       "devDependencies": {
-        "@blockly/block-test": "^7.0.1",
-        "@blockly/dev-tools": "^9.0.0",
+        "@blockly/block-test": "^7.0.2",
+        "@blockly/dev-tools": "^9.0.2",
         "@blockly/theme-modern": "^7.0.1",
         "@hyperjump/browser": "^1.1.4",
         "@hyperjump/json-schema": "^1.5.0",
@@ -90,10 +90,11 @@
       "license": "ISC"
     },
     "node_modules/@blockly/block-test": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/@blockly/block-test/-/block-test-7.0.1.tgz",
-      "integrity": "sha512-w91ZZbpJDKGQJVO7gKqQaM17ffcsW1ktrnSTz/OpDw5R4H+1q05NgWO5gYzGPzLfFdvPcrkc0v00KhD4UG7BRA==",
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/@blockly/block-test/-/block-test-7.0.2.tgz",
+      "integrity": "sha512-fwbJnMiH4EoX/CR0ZTGzSKaGfpRBn4nudquoWfvG4ekkhTjaNTldDdHvUSeyexzvwZZcT6M4I1Jtq3IoomTKEg==",
       "dev": true,
+      "license": "Apache 2.0",
       "engines": {
         "node": ">=8.17.0"
       },
@@ -102,13 +103,13 @@
       }
     },
     "node_modules/@blockly/dev-tools": {
-      "version": "9.0.1",
-      "resolved": "https://registry.npmjs.org/@blockly/dev-tools/-/dev-tools-9.0.1.tgz",
-      "integrity": "sha512-OnY24Up00owts0VtOaokUmOQdzH+K1PNcr3LC3huwa9PO0TlKiXTq4V5OuIqBS++enyj93gXQ8PhvFGudkogTQ==",
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@blockly/dev-tools/-/dev-tools-9.0.2.tgz",
+      "integrity": "sha512-Ic/+BkqEvLRZxzNQVW/FKXx1cB042xXXPTSmNlTv2qr4oY+hN2fwBtHj3PirBWAzWgMOF8VDTj/EXL36jH1/lg==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@blockly/block-test": "^7.0.1",
+        "@blockly/block-test": "^7.0.2",
         "@blockly/theme-dark": "^8.0.1",
         "@blockly/theme-deuteranopia": "^7.0.1",
         "@blockly/theme-highcontrast": "^7.0.1",

From 414f1056e8f576e86d7702ef4738f27bf9129311 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 18 Aug 2025 14:26:32 +0000
Subject: [PATCH 12/52] chore(deps): bump actions/first-interaction from 2 to 3

Bumps [actions/first-interaction](https://github.com/actions/first-interaction) from 2 to 3.
- [Release notes](https://github.com/actions/first-interaction/releases)
- [Commits](https://github.com/actions/first-interaction/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/first-interaction
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 .github/workflows/welcome_new_contributors.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/welcome_new_contributors.yml b/.github/workflows/welcome_new_contributors.yml
index 663f0320577..4c4860c25b0 100644
--- a/.github/workflows/welcome_new_contributors.yml
+++ b/.github/workflows/welcome_new_contributors.yml
@@ -9,7 +9,7 @@ jobs:
     permissions:
       pull-requests: write
     steps:
-      - uses: actions/first-interaction@v2
+      - uses: actions/first-interaction@v3
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           pr-message: >

From f682fa818bee77b779bf6f694acaf8e1d2262082 Mon Sep 17 00:00:00 2001
From: Maribeth Moffatt <maribethb@google.com>
Date: Tue, 19 Aug 2025 11:22:17 -0400
Subject: [PATCH 13/52] chore: lint error on only in mocha tests (#9300)

---
 eslint.config.mjs |  5 +++++
 package-lock.json | 26 ++++++++++++++++++++++++++
 package.json      |  1 +
 3 files changed, 32 insertions(+)

diff --git a/eslint.config.mjs b/eslint.config.mjs
index f018e525d87..0560586cbcc 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -1,6 +1,7 @@
 import eslint from '@eslint/js';
 import googleStyle from 'eslint-config-google';
 import jsdoc from 'eslint-plugin-jsdoc';
+import mochaPlugin from 'eslint-plugin-mocha';
 import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
 import globals from 'globals';
 import tseslint from 'typescript-eslint';
@@ -200,6 +201,9 @@ export default [
   },
   {
     files: ['tests/**'],
+    plugins: {
+      mocha: mochaPlugin,
+    },
     languageOptions: {
       globals: {
         'Blockly': true,
@@ -219,6 +223,7 @@ export default [
       'jsdoc/check-tag-names': ['warn', {'definedTags': ['record']}],
       'jsdoc/tag-lines': ['off'],
       'jsdoc/no-defaults': ['off'],
+      'mocha/no-exclusive-tests': 'error',
     },
   },
   {
diff --git a/package-lock.json b/package-lock.json
index e03f6d24d46..c491963ecee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,6 +28,7 @@
         "eslint-config-google": "^0.14.0",
         "eslint-config-prettier": "^10.1.1",
         "eslint-plugin-jsdoc": "^52.0.2",
+        "eslint-plugin-mocha": "^11.1.0",
         "eslint-plugin-prettier": "^5.2.1",
         "glob": "^11.0.1",
         "globals": "^16.0.0",
@@ -4137,6 +4138,31 @@
         "spdx-license-ids": "^3.0.0"
       }
     },
+    "node_modules/eslint-plugin-mocha": {
+      "version": "11.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-mocha/-/eslint-plugin-mocha-11.1.0.tgz",
+      "integrity": "sha512-rKntVWRsQFPbf8OkSgVNRVRrcVAPaGTyEgWCEyXaPDJkTl0v5/lwu1vTk5sWiUJU8l2sxwvGUZzSNrEKdVMeQw==",
+      "dev": true,
+      "dependencies": {
+        "@eslint-community/eslint-utils": "^4.4.1",
+        "globals": "^15.14.0"
+      },
+      "peerDependencies": {
+        "eslint": ">=9.0.0"
+      }
+    },
+    "node_modules/eslint-plugin-mocha/node_modules/globals": {
+      "version": "15.15.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-15.15.0.tgz",
+      "integrity": "sha512-7ACyT3wmyp3I61S4fG682L0VA2RGD9otkqGJIwNUMF1SWUombIIk+af1unuDYgMm082aHYwD+mzJvv9Iu8dsgg==",
+      "dev": true,
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/eslint-plugin-prettier": {
       "version": "5.5.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.1.tgz",
diff --git a/package.json b/package.json
index e7a496b31f8..da9f3db1aa5 100644
--- a/package.json
+++ b/package.json
@@ -115,6 +115,7 @@
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^10.1.1",
     "eslint-plugin-jsdoc": "^52.0.2",
+    "eslint-plugin-mocha": "^11.1.0",
     "eslint-plugin-prettier": "^5.2.1",
     "glob": "^11.0.1",
     "globals": "^16.0.0",

From b5343f3c886a2e0c5420644c2a995b67939e6164 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Tue, 19 Aug 2025 08:28:11 -0700
Subject: [PATCH 14/52] chore(deps): bump actions/checkout from 4 to 5 (#9320)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 .github/workflows/appengine_deploy.yml     | 2 +-
 .github/workflows/browser_test.yml         | 2 +-
 .github/workflows/build.yml                | 6 +++---
 .github/workflows/keyboard_plugin_test.yml | 4 ++--
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/appengine_deploy.yml b/.github/workflows/appengine_deploy.yml
index 50afec2407c..efc6fe9417d 100644
--- a/.github/workflows/appengine_deploy.yml
+++ b/.github/workflows/appengine_deploy.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE.
       # When running manually this checks out the master branch.
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Prepare demo files
         # Install all dependencies, then copy all the files needed for demos.
diff --git a/.github/workflows/browser_test.yml b/.github/workflows/browser_test.yml
index 51ac0dffada..c2ce9913635 100644
--- a/.github/workflows/browser_test.yml
+++ b/.github/workflows/browser_test.yml
@@ -26,7 +26,7 @@ jobs:
         # https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c4ab688f8fd..d7a4e786ce6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,7 @@ jobs:
         # https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
 
@@ -54,7 +54,7 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Use Node.js 20.x
         uses: actions/setup-node@v4
@@ -71,7 +71,7 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Use Node.js 20.x
         uses: actions/setup-node@v4
diff --git a/.github/workflows/keyboard_plugin_test.yml b/.github/workflows/keyboard_plugin_test.yml
index 753d31dda1e..3d7d3d5d444 100644
--- a/.github/workflows/keyboard_plugin_test.yml
+++ b/.github/workflows/keyboard_plugin_test.yml
@@ -25,12 +25,12 @@ jobs:
 
     steps:
       - name: Checkout core Blockly
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: core-blockly
 
       - name: Checkout keyboard navigation plugin
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: 'google/blockly-keyboard-experimentation'
           ref: 'main'

From 405f7da2806101c165d2a65008f94998d0d8aeef Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 19 Aug 2025 08:32:31 -0700
Subject: [PATCH 15/52] fix: Fix positioning of pasted blocks and comments in
 RTL. (#9302)

* fix: Fix positioning of pasted blocks in RTL.

* fix: Clean up after temporarily making the workspace RTL.

* fix: Remove .only.

* fix: Fix positioning of pasted comments in RTL.

* fix: Fix positioning of text preview on collapsed comments in RTL.
---
 core/clipboard/block_paster.ts |  3 ++
 core/comments/comment_view.ts  |  5 +++-
 core/xml.ts                    |  2 +-
 tests/mocha/clipboard_test.js  | 51 ++++++++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/core/clipboard/block_paster.ts b/core/clipboard/block_paster.ts
index 750cedca124..e782cc0b004 100644
--- a/core/clipboard/block_paster.ts
+++ b/core/clipboard/block_paster.ts
@@ -83,6 +83,9 @@ export function moveBlockToNotConflict(
   block: BlockSvg,
   originalPosition: Coordinate,
 ) {
+  if (block.workspace.RTL) {
+    originalPosition.x = block.workspace.getWidth() - originalPosition.x;
+  }
   const workspace = block.workspace;
   const snapRadius = config.snapRadius;
   const bumpOffset = Coordinate.difference(
diff --git a/core/comments/comment_view.ts b/core/comments/comment_view.ts
index ca0c261c390..b1cd628f8dd 100644
--- a/core/comments/comment_view.ts
+++ b/core/comments/comment_view.ts
@@ -368,7 +368,10 @@ export class CommentView implements IRenderedElement {
 
     const textPreviewWidth =
       size.width - foldoutSize.getWidth() - deleteSize.getWidth();
-    this.textPreview.setAttribute('x', `${foldoutSize.getWidth()}`);
+    this.textPreview.setAttribute(
+      'x',
+      `${(this.workspace.RTL ? -1 : 1) * foldoutSize.getWidth()}`,
+    );
     this.textPreview.setAttribute(
       'y',
       `${textPreviewMargin + textPreviewSize.height / 2}`,
diff --git a/core/xml.ts b/core/xml.ts
index cc26d8c8a2c..362a59ab287 100644
--- a/core/xml.ts
+++ b/core/xml.ts
@@ -68,7 +68,7 @@ export function saveWorkspaceComment(
   if (!skipId) elem.setAttribute('id', comment.id);
 
   const workspace = comment.workspace;
-  const loc = comment.getRelativeToSurfaceXY();
+  const loc = comment.getRelativeToSurfaceXY().clone();
   loc.x = workspace.RTL ? workspace.getWidth() - loc.x : loc.x;
   elem.setAttribute('x', `${loc.x}`);
   elem.setAttribute('y', `${loc.y}`);
diff --git a/tests/mocha/clipboard_test.js b/tests/mocha/clipboard_test.js
index d58f78b9b50..5a513b44a9e 100644
--- a/tests/mocha/clipboard_test.js
+++ b/tests/mocha/clipboard_test.js
@@ -157,6 +157,34 @@ suite('Clipboard', function () {
         );
       });
 
+      test('pasted blocks are bumped to not overlap in RTL', function () {
+        this.workspace.dispose();
+        this.workspace = Blockly.inject('blocklyDiv', {rtl: true});
+        const block = Blockly.serialization.blocks.append(
+          {
+            'type': 'controls_if',
+            'x': 38,
+            'y': 13,
+          },
+          this.workspace,
+        );
+        const data = block.toCopyData();
+
+        const newBlock = Blockly.clipboard.paste(data, this.workspace);
+        const oldBlockXY = block.getRelativeToSurfaceXY();
+        assert.deepEqual(
+          newBlock.getRelativeToSurfaceXY(),
+          new Blockly.utils.Coordinate(
+            oldBlockXY.x - Blockly.config.snapRadius,
+            oldBlockXY.y + Blockly.config.snapRadius * 2,
+          ),
+        );
+
+        // Restore an LTR workspace.
+        this.workspace.dispose();
+        this.workspace = Blockly.inject('blocklyDiv');
+      });
+
       test('pasted blocks are bumped to be outside the connection snap radius', function () {
         Blockly.serialization.workspaces.load(
           {
@@ -208,5 +236,28 @@ suite('Clipboard', function () {
         new Blockly.utils.Coordinate(40, 40),
       );
     });
+
+    test('pasted comments are bumped to not overlap in RTL', function () {
+      this.workspace.dispose();
+      this.workspace = Blockly.inject('blocklyDiv', {rtl: true});
+      Blockly.Xml.domToWorkspace(
+        Blockly.utils.xml.textToDom(
+          '<xml><comment id="test" x=10 y=10/></xml>',
+        ),
+        this.workspace,
+      );
+      const comment = this.workspace.getTopComments(false)[0];
+      const data = comment.toCopyData();
+
+      const newComment = Blockly.clipboard.paste(data, this.workspace);
+      const oldCommentXY = comment.getRelativeToSurfaceXY();
+      assert.deepEqual(
+        newComment.getRelativeToSurfaceXY(),
+        new Blockly.utils.Coordinate(oldCommentXY.x - 30, oldCommentXY.y + 30),
+      );
+      // Restore an LTR workspace.
+      this.workspace.dispose();
+      this.workspace = Blockly.inject('blocklyDiv');
+    });
   });
 });

From ac7619a6222a2c9bc3b34c6908093490ac02733b Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 19 Aug 2025 14:56:59 -0700
Subject: [PATCH 16/52] chore: Fix documentation generation warnings. (#9325)

* chore: Replace @yields with @returns.

* fix: Update the ESLint config to not require @yields.

* chore: Move docs onto getters.
---
 core/block.ts       | 2 +-
 core/field.ts       | 3 ---
 core/field_input.ts | 6 ++----
 eslint.config.mjs   | 3 ++-
 4 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/core/block.ts b/core/block.ts
index d15700a7e19..af44facda5d 100644
--- a/core/block.ts
+++ b/core/block.ts
@@ -1126,7 +1126,7 @@ export class Block {
   /**
    * Returns a generator that provides every field on the block.
    *
-   * @yields A generator that can be used to iterate the fields on the block.
+   * @returns A generator that can be used to iterate the fields on the block.
    */
   *getFields(): Generator<Field, undefined, void> {
     for (const input of this.inputList) {
diff --git a/core/field.ts b/core/field.ts
index fdcb2d693b9..3d12880a93a 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -119,9 +119,6 @@ export abstract class Field<T = any>
     return this.size;
   }
 
-  /**
-   * Sets the size of this field.
-   */
   protected set size_(newValue: Size) {
     this.size = newValue;
   }
diff --git a/core/field_input.ts b/core/field_input.ts
index b685309183a..97ad0e9594d 100644
--- a/core/field_input.ts
+++ b/core/field_input.ts
@@ -102,11 +102,9 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
    */
   override SERIALIZABLE = true;
 
-  /**
-   * Sets the size of this field. Although this appears to be a no-op, it must
-   * exist since the getter is overridden below.
-   */
   protected override set size_(newValue: Size) {
+    // Although this appears to be a no-op, it must exist since the getter is
+    // overridden below.
     super.size_ = newValue;
   }
 
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0560586cbcc..744e02b45bf 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -89,7 +89,8 @@ function buildTSOverride({files, tsconfig}) {
       '@typescript-eslint/no-explicit-any': ['off'],
       // We use this pattern extensively for block (e.g. controls_if) interfaces.
       '@typescript-eslint/no-empty-object-type': ['off'],
-
+      // TSDoc doesn't support @yields, so don't require that we use it.
+      'jsdoc/require-yields': ['off'],
       // params and returns docs are optional.
       'jsdoc/require-param-description': ['off'],
       'jsdoc/require-returns': ['off'],

From 5cc95e44e78a0b5c0a96865adb962cf012916254 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 20 Aug 2025 11:26:45 -0700
Subject: [PATCH 17/52] fix: Show the delete cursor when dragging a block by an
 editable field. (#9326)

---
 core/css.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/css.ts b/core/css.ts
index 30ee47fc58a..503b6362ba2 100644
--- a/core/css.ts
+++ b/core/css.ts
@@ -181,7 +181,8 @@ let content = `
   cursor: -webkit-grabbing;
 }
 
-.blocklyDragging.blocklyDraggingDelete {
+.blocklyDragging.blocklyDraggingDelete,
+.blocklyDragging.blocklyDraggingDelete .blocklyField {
   cursor: url("<<<PATH>>>/handdelete.cur"), auto;
 }
 

From 3e26b00038af4c87a516c04682699ebbb124aa1c Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 21 Aug 2025 11:05:43 -0700
Subject: [PATCH 18/52] fix: Correct the alignment of narrow text in input
 fields. (#9327)

* fix: Correct the alignment of narrow text in input fields.

* chore: Clarify purpose of first argument to positionTextElement_().
---
 core/field.ts          |  3 +--
 core/field_dropdown.ts |  7 +++----
 core/field_input.ts    | 26 ++++++++++++++++++++++++--
 3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/core/field.ts b/core/field.ts
index 3d12880a93a..d993e197d23 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -849,8 +849,7 @@ export abstract class Field<T = any>
       totalHeight = Math.max(totalHeight, constants!.FIELD_BORDER_RECT_HEIGHT);
     }
 
-    this.size_.height = totalHeight;
-    this.size_.width = totalWidth;
+    this.size_ = new Size(totalWidth, totalHeight);
 
     this.positionTextElement_(xOffset, contentWidth);
     this.positionBorderRect_();
diff --git a/core/field_dropdown.ts b/core/field_dropdown.ts
index 8b01ccddab1..3be5c94c3e3 100644
--- a/core/field_dropdown.ts
+++ b/core/field_dropdown.ts
@@ -29,6 +29,7 @@ import * as aria from './utils/aria.js';
 import {Coordinate} from './utils/coordinate.js';
 import * as dom from './utils/dom.js';
 import * as parsing from './utils/parsing.js';
+import {Size} from './utils/size.js';
 import * as utilsString from './utils/string.js';
 import {Svg} from './utils/svg.js';
 
@@ -553,8 +554,7 @@ export class FieldDropdown extends Field<string> {
     } else {
       arrowWidth = dom.getTextWidth(this.arrow as SVGTSpanElement);
     }
-    this.size_.width = imageWidth + arrowWidth + xPadding * 2;
-    this.size_.height = height;
+    this.size_ = new Size(imageWidth + arrowWidth + xPadding * 2, height);
 
     let arrowX = 0;
     if (block.RTL) {
@@ -595,8 +595,7 @@ export class FieldDropdown extends Field<string> {
         height / 2 - this.getConstants()!.FIELD_DROPDOWN_SVG_ARROW_SIZE / 2,
       );
     }
-    this.size_.width = textWidth + arrowWidth + xPadding * 2;
-    this.size_.height = height;
+    this.size_ = new Size(textWidth + arrowWidth + xPadding * 2, height);
 
     this.positionTextElement_(xPadding, textWidth);
   }
diff --git a/core/field_input.ts b/core/field_input.ts
index 97ad0e9594d..55383a4c1d2 100644
--- a/core/field_input.ts
+++ b/core/field_input.ts
@@ -45,6 +45,11 @@ import type {WorkspaceSvg} from './workspace_svg.js';
  */
 type InputTypes = string | number;
 
+/**
+ * The minimum width of an input field.
+ */
+const MINIMUM_WIDTH = 14;
+
 /**
  * Abstract class for an editable input field.
  *
@@ -113,8 +118,8 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
    */
   protected override get size_() {
     const s = super.size_;
-    if (s.width < 14) {
-      s.width = 14;
+    if (s.width < MINIMUM_WIDTH) {
+      s.width = MINIMUM_WIDTH;
     }
 
     return s;
@@ -730,6 +735,23 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
     return true;
   }
 
+  /**
+   * Position a field's text element after a size change.  This handles both LTR
+   * and RTL positioning.
+   *
+   * @param xMargin x offset to use when positioning the text element.
+   * @param contentWidth The content width.
+   */
+  protected override positionTextElement_(
+    xMargin: number,
+    contentWidth: number,
+  ) {
+    const effectiveWidth = xMargin * 2 + contentWidth;
+    const delta =
+      effectiveWidth < MINIMUM_WIDTH ? (MINIMUM_WIDTH - effectiveWidth) / 2 : 0;
+    super.positionTextElement_(xMargin + delta, contentWidth);
+  }
+
   /**
    * Use the `getText_` developer hook to override the field's text
    * representation. When we're currently editing, return the current HTML value

From c6730ab74fb5ba5025055fb5e55b1f0152450dba Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 21 Aug 2025 11:15:07 -0700
Subject: [PATCH 19/52] fix: Fix bug that caused inadvertent scrolling when the
 `WidgetDiv` was shown. (#9291)

* fix: Fix bug that caused inadvertent scrolling when the `WidgetDiv` was shown.

* chore: Add test to verify that displaying the context menu does not scroll the page.

* chore: Clarify comments.

* fix: Remove errant `.only`.

* chore: Add test to verify that actively focusing a node does not scroll the page.

* fix: Remove inadvertent `.only`.
---
 core/focus_manager.ts                        |  8 +++-
 core/interfaces/i_focusable_node.ts          |  3 ++
 tests/browser/test/basic_playground_test.mjs | 39 ++++++++++++++++++++
 3 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/core/focus_manager.ts b/core/focus_manager.ts
index 02e0591070f..47e4324540d 100644
--- a/core/focus_manager.ts
+++ b/core/focus_manager.ts
@@ -309,6 +309,8 @@ export class FocusManager {
    * Note that this may update the specified node's element's tabindex to ensure
    * that it can be properly read out by screenreaders while focused.
    *
+   * The focused node will not be automatically scrolled into view.
+   *
    * @param focusableNode The node that should receive active focus.
    */
   focusNode(focusableNode: IFocusableNode): void {
@@ -423,6 +425,8 @@ export class FocusManager {
    * the returned lambda is called. Additionally, only 1 ephemeral focus context
    * can be active at any given time (attempting to activate more than one
    * simultaneously will result in an error being thrown).
+   *
+   * This method does not scroll the ephemerally focused element into view.
    */
   takeEphemeralFocus(
     focusableElement: HTMLElement | SVGElement,
@@ -439,7 +443,7 @@ export class FocusManager {
     if (this.focusedNode) {
       this.passivelyFocusNode(this.focusedNode, null);
     }
-    focusableElement.focus();
+    focusableElement.focus({preventScroll: true});
 
     let hasFinishedEphemeralFocus = false;
     return () => {
@@ -574,7 +578,7 @@ export class FocusManager {
     }
 
     this.setNodeToVisualActiveFocus(node);
-    elem.focus();
+    elem.focus({preventScroll: true});
   }
 
   /**
diff --git a/core/interfaces/i_focusable_node.ts b/core/interfaces/i_focusable_node.ts
index 24833328d7f..57ec1a126e1 100644
--- a/core/interfaces/i_focusable_node.ts
+++ b/core/interfaces/i_focusable_node.ts
@@ -59,6 +59,9 @@ export interface IFocusableNode {
    * they should avoid the following:
    * - Creating or removing DOM elements (including via the renderer or drawer).
    * - Affecting focus via DOM focus() calls or the FocusManager.
+   *
+   * Implementations may consider scrolling themselves into view here; that is
+   * not handled by the focus manager.
    */
   onNodeFocus(): void;
 
diff --git a/tests/browser/test/basic_playground_test.mjs b/tests/browser/test/basic_playground_test.mjs
index 4c54523bd7f..c7c8a5a370c 100644
--- a/tests/browser/test/basic_playground_test.mjs
+++ b/tests/browser/test/basic_playground_test.mjs
@@ -101,6 +101,45 @@ suite('Right Clicking on Blocks', function () {
     await contextMenuSelect(this.browser, this.block, 'Remove Comment');
     chai.assert.isNull(await getCommentText(this.browser, this.block.id));
   });
+
+  test('does not scroll the page when node is ephemerally focused', async function () {
+    const initialScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+    // This left-right-left sequence was necessary to reproduce unintended
+    // scrolling; regardless of the number of clicks/context menu activations,
+    // the page should not scroll.
+    this.block.click({button: 2});
+    this.block.click({button: 0});
+    this.block.click({button: 2});
+    await this.browser.pause(250);
+    const finalScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+
+    chai.assert.equal(initialScroll, finalScroll);
+  });
+
+  test('does not scroll the page when node is actively focused', async function () {
+    await this.browser.setWindowSize(500, 300);
+    await this.browser.setViewport({width: 500, height: 300});
+    const initialScroll = await this.browser.execute((blockId) => {
+      window.scrollTo(0, document.body.scrollHeight);
+      return window.scrollY;
+    }, this.block.id);
+    await this.browser.execute(() => {
+      Blockly.getFocusManager().focusNode(
+        Blockly.getMainWorkspace().getToolbox(),
+      );
+    });
+    const finalScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+
+    chai.assert.equal(initialScroll, finalScroll);
+    await this.browser.setWindowSize(800, 600);
+    await this.browser.setViewport({width: 800, height: 600});
+  });
 });
 
 suite('Disabling', function () {

From cacd3583f5a7e061165d1fabe251e1e366f154f6 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Thu, 21 Aug 2025 12:06:10 -0700
Subject: [PATCH 20/52] chore(deps): bump eslint-plugin-prettier from 5.5.1 to
 5.5.4 (#9319)

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 5.5.1 to 5.5.4.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/eslint-plugin-prettier/compare/v5.5.1...v5.5.4)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-version: 5.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index c491963ecee..c20932519c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4164,10 +4164,11 @@
       }
     },
     "node_modules/eslint-plugin-prettier": {
-      "version": "5.5.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.1.tgz",
-      "integrity": "sha512-dobTkHT6XaEVOo8IO90Q4DOSxnm3Y151QxPJlM/vKC0bVy+d6cVWQZLlFiuZPP0wS6vZwSKeJgKkcS+KfMBlRw==",
+      "version": "5.5.4",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.4.tgz",
+      "integrity": "sha512-swNtI95SToIz05YINMA6Ox5R057IMAmWZ26GqPxusAp1TZzj+IdY9tXNWWD3vkF/wEqydCONcwjTFpxybBqZsg==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "prettier-linter-helpers": "^1.0.0",
         "synckit": "^0.11.7"

From 802472486e755554188f2f7ba88ad71381f211c7 Mon Sep 17 00:00:00 2001
From: Ennis Nian <nxy1027@163.com>
Date: Fri, 22 Aug 2025 04:59:09 +0800
Subject: [PATCH 21/52] fix: pointercancel event is not handled (#9250)

---
 core/touch.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/touch.ts b/core/touch.ts
index 8fb2cd2298c..9af3b1f9494 100644
--- a/core/touch.ts
+++ b/core/touch.ts
@@ -46,6 +46,7 @@ export const TOUCH_MAP: {[key: string]: string[]} = {
   'mouseup': ['pointerup', 'pointercancel'],
   'touchend': ['pointerup'],
   'touchcancel': ['pointercancel'],
+  'pointerup': ['pointerup', 'pointercancel'],
 };
 
 /** PID of queued long-press task. */

From 86da7dcbfab72a84182f633295ce0e904b1bb9bd Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 21 Aug 2025 14:21:02 -0700
Subject: [PATCH 22/52] release: Update version number to 12.3.0-beta.0

---
 package-lock.json | 4 ++--
 package.json      | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index e03f6d24d46..c7f681f2e38 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "blockly",
-  "version": "12.2.0",
+  "version": "12.3.0-beta.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "blockly",
-      "version": "12.2.0",
+      "version": "12.3.0-beta.0",
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
diff --git a/package.json b/package.json
index e7a496b31f8..c122a32fe1f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "blockly",
-  "version": "12.2.0",
+  "version": "12.3.0-beta.0",
   "description": "Blockly is a library for building visual programming editors.",
   "keywords": [
     "blockly"

From dd05c8de2ff5506bfa99b8bc7b48e5ac87bfb770 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Fri, 22 Aug 2025 20:01:03 +0100
Subject: [PATCH 23/52] chore(deps): bump eslint-config-prettier from 10.1.5 to
 10.1.8 (#9321)

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 10.1.5 to 10.1.8.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/eslint-config-prettier/compare/v10.1.5...v10.1.8)

---
updated-dependencies:
- dependency-name: eslint-config-prettier
  dependency-version: 10.1.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index c20932519c1..24f3ad602d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4076,10 +4076,11 @@
       }
     },
     "node_modules/eslint-config-prettier": {
-      "version": "10.1.5",
-      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.5.tgz",
-      "integrity": "sha512-zc1UmCpNltmVY34vuLRV61r1K27sWuX39E+uyUnY8xS2Bex88VV9cugG+UZbRSRGtGyFboj+D8JODyme1plMpw==",
+      "version": "10.1.8",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.8.tgz",
+      "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
       "dev": true,
+      "license": "MIT",
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },

From 3b498d1384baba09e3787b1ce92bb1364d121304 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Fri, 22 Aug 2025 14:55:07 -0700
Subject: [PATCH 24/52] fix: Allow reregistering fields. (#9290)

---
 core/field_registry.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/field_registry.ts b/core/field_registry.ts
index 06bb9acd045..e02ece75c96 100644
--- a/core/field_registry.ts
+++ b/core/field_registry.ts
@@ -56,11 +56,11 @@ export interface RegistrableField {
  * @param type The field type name as used in the JSON definition.
  * @param fieldClass The field class containing a fromJson function that can
  *     construct an instance of the field.
- * @throws {Error} if the type name is empty, the field is already registered,
- *     or the fieldClass is not an object containing a fromJson function.
+ * @throws {Error} if the type name is empty or the fieldClass is not an object
+ *     containing a fromJson function.
  */
 export function register(type: string, fieldClass: RegistrableField) {
-  registry.register(registry.Type.FIELD, type, fieldClass);
+  registry.register(registry.Type.FIELD, type, fieldClass, true);
 }
 
 /**

From 8873e5fe7ac03f150a066dca1b24e7d90e183ec4 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Tue, 26 Aug 2025 09:08:01 -0700
Subject: [PATCH 25/52] chore(deps): bump chai from 5.2.1 to 6.0.1 (#9330)

* chore(deps): bump chai from 5.2.1 to 6.0.1

Bumps [chai](https://github.com/chaijs/chai) from 5.2.1 to 6.0.1.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](https://github.com/chaijs/chai/compare/v5.2.1...v6.0.1)

---
updated-dependencies:
- dependency-name: chai
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix: Fix Chai import path.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Aaron Dodson <adodson@google.com>
---
 package-lock.json                             | 60 ++-----------------
 package.json                                  |  2 +-
 tests/mocha/block_json_test.js                |  2 +-
 tests/mocha/block_test.js                     |  2 +-
 tests/mocha/blocks/lists_test.js              |  2 +-
 tests/mocha/blocks/logic_ternary_test.js      |  2 +-
 tests/mocha/blocks/loops_test.js              |  2 +-
 tests/mocha/blocks/procedures_test.js         |  2 +-
 tests/mocha/blocks/variables_test.js          |  2 +-
 tests/mocha/clipboard_test.js                 |  2 +-
 tests/mocha/comment_deserialization_test.js   |  2 +-
 tests/mocha/comment_test.js                   |  2 +-
 tests/mocha/comment_view_test.js              |  2 +-
 tests/mocha/connection_checker_test.js        |  2 +-
 tests/mocha/connection_db_test.js             |  2 +-
 tests/mocha/connection_test.js                |  2 +-
 tests/mocha/contextmenu_items_test.js         |  2 +-
 tests/mocha/contextmenu_test.js               |  2 +-
 tests/mocha/cursor_test.js                    |  2 +-
 tests/mocha/dialog_test.js                    |  2 +-
 tests/mocha/dropdowndiv_test.js               |  2 +-
 tests/mocha/event_block_change_test.js        |  2 +-
 tests/mocha/event_block_create_test.js        |  2 +-
 tests/mocha/event_block_delete_test.js        |  2 +-
 tests/mocha/event_block_drag_test.js          |  2 +-
 ...nt_block_field_intermediate_change_test.js |  2 +-
 tests/mocha/event_block_move_test.js          |  2 +-
 tests/mocha/event_bubble_open_test.js         |  2 +-
 tests/mocha/event_click_test.js               |  2 +-
 tests/mocha/event_comment_change_test.js      |  2 +-
 tests/mocha/event_comment_collapse_test.js    |  2 +-
 tests/mocha/event_comment_create_test.js      |  2 +-
 tests/mocha/event_comment_delete_test.js      |  2 +-
 tests/mocha/event_comment_drag_test.js        |  2 +-
 tests/mocha/event_comment_move_test.js        |  2 +-
 tests/mocha/event_comment_resize_test.js      |  2 +-
 tests/mocha/event_selected_test.js            |  2 +-
 tests/mocha/event_test.js                     |  2 +-
 tests/mocha/event_theme_change_test.js        |  2 +-
 tests/mocha/event_toolbox_item_select_test.js |  2 +-
 tests/mocha/event_trashcan_open_test.js       |  2 +-
 tests/mocha/event_var_create_test.js          |  2 +-
 tests/mocha/event_var_delete_test.js          |  2 +-
 tests/mocha/event_var_rename_test.js          |  2 +-
 tests/mocha/event_var_type_change_test.js     |  2 +-
 tests/mocha/event_viewport_test.js            |  2 +-
 tests/mocha/extensions_test.js                |  2 +-
 tests/mocha/field_checkbox_test.js            |  2 +-
 tests/mocha/field_colour_test.js              |  2 +-
 tests/mocha/field_dropdown_test.js            |  2 +-
 tests/mocha/field_image_test.js               |  2 +-
 tests/mocha/field_label_serializable_test.js  |  2 +-
 tests/mocha/field_label_test.js               |  2 +-
 tests/mocha/field_number_test.js              |  2 +-
 tests/mocha/field_registry_test.js            |  2 +-
 tests/mocha/field_test.js                     |  2 +-
 tests/mocha/field_textinput_test.js           |  2 +-
 tests/mocha/field_variable_test.js            |  2 +-
 tests/mocha/flyout_test.js                    |  2 +-
 tests/mocha/focus_manager_test.js             |  2 +-
 tests/mocha/focusable_tree_traverser_test.js  |  2 +-
 tests/mocha/generator_test.js                 |  2 +-
 tests/mocha/gesture_test.js                   |  2 +-
 tests/mocha/icon_test.js                      |  2 +-
 tests/mocha/input_test.js                     |  2 +-
 tests/mocha/insertion_marker_test.js          |  2 +-
 tests/mocha/jso_deserialization_test.js       |  2 +-
 tests/mocha/jso_serialization_test.js         |  2 +-
 tests/mocha/json_test.js                      |  2 +-
 .../keyboard_navigation_controller_test.js    |  2 +-
 tests/mocha/layering_test.js                  |  2 +-
 tests/mocha/metrics_test.js                   |  2 +-
 tests/mocha/mutator_test.js                   |  2 +-
 tests/mocha/names_test.js                     |  2 +-
 tests/mocha/navigation_test.js                |  2 +-
 tests/mocha/old_workspace_comment_test.js     |  2 +-
 tests/mocha/procedure_map_test.js             |  2 +-
 tests/mocha/rect_test.js                      |  2 +-
 tests/mocha/registry_test.js                  |  2 +-
 tests/mocha/render_management_test.js         |  2 +-
 tests/mocha/serializer_test.js                |  2 +-
 tests/mocha/shortcut_items_test.js            |  2 +-
 tests/mocha/shortcut_registry_test.js         |  2 +-
 tests/mocha/test_helpers/code_generation.js   |  2 +-
 tests/mocha/test_helpers/events.js            |  2 +-
 tests/mocha/test_helpers/fields.js            |  2 +-
 tests/mocha/test_helpers/procedures.js        |  2 +-
 tests/mocha/test_helpers/serialization.js     |  2 +-
 tests/mocha/test_helpers/variables.js         |  2 +-
 tests/mocha/test_helpers/warnings.js          |  2 +-
 tests/mocha/test_helpers/workspace.js         |  2 +-
 tests/mocha/theme_test.js                     |  2 +-
 tests/mocha/toast_test.js                     |  2 +-
 tests/mocha/toolbox_test.js                   |  2 +-
 tests/mocha/tooltip_test.js                   |  2 +-
 tests/mocha/touch_test.js                     |  2 +-
 tests/mocha/trashcan_test.js                  |  2 +-
 tests/mocha/utils_test.js                     |  2 +-
 tests/mocha/variable_map_test.js              |  2 +-
 tests/mocha/variable_model_test.js            |  2 +-
 tests/mocha/widget_div_test.js                |  2 +-
 tests/mocha/workspace_comment_test.js         |  2 +-
 tests/mocha/workspace_svg_test.js             |  2 +-
 tests/mocha/xml_test.js                       |  2 +-
 tests/mocha/zoom_controls_test.js             |  2 +-
 105 files changed, 108 insertions(+), 160 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 24f3ad602d8..287be1f1f97 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@microsoft/api-extractor": "^7.29.5",
         "ajv": "^8.17.1",
         "async-done": "^2.0.0",
-        "chai": "^5.1.1",
+        "chai": "^6.0.1",
         "concurrently": "^9.0.1",
         "eslint": "^9.15.0",
         "eslint-config-google": "^0.14.0",
@@ -2489,15 +2489,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/assertion-error": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
-      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
-      "dev": true,
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -2882,18 +2873,11 @@
       }
     },
     "node_modules/chai": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-5.2.1.tgz",
-      "integrity": "sha512-5nFxhUrX0PqtyogoYOA8IPswy5sZFTOsBFl/9bNsmDLgsxYTzSZQJDPppDnZPTQbzSEm0hqGjWPzRemQCYbD6A==",
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.0.1.tgz",
+      "integrity": "sha512-/JOoU2//6p5vCXh00FpNgtlw0LjvhGttaWc+y7wpW9yjBm3ys0dI8tSKZxIOgNruz5J0RleccatSIC3uxEZP0g==",
       "dev": true,
       "license": "MIT",
-      "dependencies": {
-        "assertion-error": "^2.0.1",
-        "check-error": "^2.1.1",
-        "deep-eql": "^5.0.1",
-        "loupe": "^3.1.0",
-        "pathval": "^2.0.0"
-      },
       "engines": {
         "node": ">=18"
       }
@@ -2914,15 +2898,6 @@
         "url": "https://github.com/chalk/chalk?sponsor=1"
       }
     },
-    "node_modules/check-error": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/check-error/-/check-error-2.1.1.tgz",
-      "integrity": "sha512-OAlb+T7V4Op9OwdkjmguYRqncdlx5JiofwOAUkmTF+jNdHwzTaTs4sRAGpzLF3oOz5xAyDGrPgeIDFQmDOTiJw==",
-      "dev": true,
-      "engines": {
-        "node": ">= 16"
-      }
-    },
     "node_modules/cheerio": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-1.0.0.tgz",
@@ -3586,15 +3561,6 @@
         "node": ">=0.10"
       }
     },
-    "node_modules/deep-eql": {
-      "version": "5.0.2",
-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-5.0.2.tgz",
-      "integrity": "sha512-h5k/5U50IJJFpzfL6nO9jaaumfjO/f2NjK/oYB2Djzm4p9L+3T9qWpZqZ2hAbLPuuYq9wrU08WQyBTL5GbPk5Q==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/deep-is": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
@@ -6794,15 +6760,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/loupe": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/loupe/-/loupe-3.1.1.tgz",
-      "integrity": "sha512-edNu/8D5MKVfGVFRhFf8aAxiTM6Wumfz5XsaatSxlD3w4R1d/WEKUTydCdPGbl9K7QG/Ca3GnDV2sIKIpXRQcw==",
-      "dev": true,
-      "dependencies": {
-        "get-func-name": "^2.0.1"
-      }
-    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -7731,15 +7688,6 @@
       "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
       "dev": true
     },
-    "node_modules/pathval": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-2.0.0.tgz",
-      "integrity": "sha512-vE7JKRyES09KiunauX7nd2Q9/L7lhok4smP9RZTDeD4MVs72Dp2qNFVz39Nz5a0FVEW0BJR6C0DYrq6unoziZA==",
-      "dev": true,
-      "engines": {
-        "node": ">= 14.16"
-      }
-    },
     "node_modules/pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
diff --git a/package.json b/package.json
index da9f3db1aa5..29865b98659 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "@microsoft/api-extractor": "^7.29.5",
     "ajv": "^8.17.1",
     "async-done": "^2.0.0",
-    "chai": "^5.1.1",
+    "chai": "^6.0.1",
     "concurrently": "^9.0.1",
     "eslint": "^9.15.0",
     "eslint-config-google": "^0.14.0",
diff --git a/tests/mocha/block_json_test.js b/tests/mocha/block_json_test.js
index 4baccef6b7b..31abd6e3484 100644
--- a/tests/mocha/block_json_test.js
+++ b/tests/mocha/block_json_test.js
@@ -5,7 +5,7 @@
  */
 
 import {Align} from '../../build/src/core/inputs/align.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/block_test.js b/tests/mocha/block_test.js
index e3bd470902d..1f8f9b1ee41 100644
--- a/tests/mocha/block_test.js
+++ b/tests/mocha/block_test.js
@@ -11,7 +11,7 @@ import {IconType} from '../../build/src/core/icons/icon_types.js';
 import {EndRowInput} from '../../build/src/core/inputs/end_row_input.js';
 import {isCommentIcon} from '../../build/src/core/interfaces/i_comment_icon.js';
 import {Size} from '../../build/src/core/utils/size.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createRenderedBlock} from './test_helpers/block_definitions.js';
 import {
   createChangeListenerSpy,
diff --git a/tests/mocha/blocks/lists_test.js b/tests/mocha/blocks/lists_test.js
index 490109d22ca..e749fae90a7 100644
--- a/tests/mocha/blocks/lists_test.js
+++ b/tests/mocha/blocks/lists_test.js
@@ -5,7 +5,7 @@
  */
 
 import {ConnectionType} from '../../../build/src/core/connection_type.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {defineStatementBlock} from '../test_helpers/block_definitions.js';
 import {runSerializationTestSuite} from '../test_helpers/serialization.js';
 import {
diff --git a/tests/mocha/blocks/logic_ternary_test.js b/tests/mocha/blocks/logic_ternary_test.js
index 71920935981..3d343a7caec 100644
--- a/tests/mocha/blocks/logic_ternary_test.js
+++ b/tests/mocha/blocks/logic_ternary_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as eventUtils from '../../../build/src/core/events/utils.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runSerializationTestSuite} from '../test_helpers/serialization.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/blocks/loops_test.js b/tests/mocha/blocks/loops_test.js
index f8d74916c29..eb040c884a7 100644
--- a/tests/mocha/blocks/loops_test.js
+++ b/tests/mocha/blocks/loops_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../../build/src/core/blockly.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/blocks/procedures_test.js b/tests/mocha/blocks/procedures_test.js
index 4b20662cf93..5ac651fe4cd 100644
--- a/tests/mocha/blocks/procedures_test.js
+++ b/tests/mocha/blocks/procedures_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../../build/src/core/blockly.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {defineRowBlock} from '../test_helpers/block_definitions.js';
 import {
   assertCallBlockStructure,
diff --git a/tests/mocha/blocks/variables_test.js b/tests/mocha/blocks/variables_test.js
index d12691dd476..a317fe11b52 100644
--- a/tests/mocha/blocks/variables_test.js
+++ b/tests/mocha/blocks/variables_test.js
@@ -5,7 +5,7 @@
  */
 
 import {nameUsedWithConflictingParam} from '../../../build/src/core/variables.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {
   MockParameterModelWithVar,
   MockProcedureModel,
diff --git a/tests/mocha/clipboard_test.js b/tests/mocha/clipboard_test.js
index 5a513b44a9e..ff49c0e303c 100644
--- a/tests/mocha/clipboard_test.js
+++ b/tests/mocha/clipboard_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   createChangeListenerSpy,
diff --git a/tests/mocha/comment_deserialization_test.js b/tests/mocha/comment_deserialization_test.js
index 54ee0b2ff30..f834eb0f301 100644
--- a/tests/mocha/comment_deserialization_test.js
+++ b/tests/mocha/comment_deserialization_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/comment_test.js b/tests/mocha/comment_test.js
index 0ff1c239e30..1f52df8fd52 100644
--- a/tests/mocha/comment_test.js
+++ b/tests/mocha/comment_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/comment_view_test.js b/tests/mocha/comment_view_test.js
index 57a24742457..a60a7a973ff 100644
--- a/tests/mocha/comment_view_test.js
+++ b/tests/mocha/comment_view_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_checker_test.js b/tests/mocha/connection_checker_test.js
index fee2966d766..bdbcb70a6ec 100644
--- a/tests/mocha/connection_checker_test.js
+++ b/tests/mocha/connection_checker_test.js
@@ -5,7 +5,7 @@
  */
 
 import {ConnectionType} from '../../build/src/core/connection_type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_db_test.js b/tests/mocha/connection_db_test.js
index 04f685124ca..459c59e3ab4 100644
--- a/tests/mocha/connection_db_test.js
+++ b/tests/mocha/connection_db_test.js
@@ -6,7 +6,7 @@
 
 import {ConnectionType} from '../../build/src/core/connection_type.js';
 import * as idGenerator from '../../build/src/core/utils/idgenerator.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_test.js b/tests/mocha/connection_test.js
index cefea1784e7..b36f358eac3 100644
--- a/tests/mocha/connection_test.js
+++ b/tests/mocha/connection_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineRowBlock,
   defineStackBlock,
diff --git a/tests/mocha/contextmenu_items_test.js b/tests/mocha/contextmenu_items_test.js
index d9044ec7e28..08ab5d5267b 100644
--- a/tests/mocha/contextmenu_items_test.js
+++ b/tests/mocha/contextmenu_items_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/contextmenu_test.js b/tests/mocha/contextmenu_test.js
index 65896112bb1..df5bf79dc35 100644
--- a/tests/mocha/contextmenu_test.js
+++ b/tests/mocha/contextmenu_test.js
@@ -6,7 +6,7 @@
 
 import {callbackFactory} from '../../build/src/core/contextmenu.js';
 import * as xmlUtils from '../../build/src/core/utils/xml.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/cursor_test.js b/tests/mocha/cursor_test.js
index 6f841ae09c6..02426ae26b8 100644
--- a/tests/mocha/cursor_test.js
+++ b/tests/mocha/cursor_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createRenderedBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/dialog_test.js b/tests/mocha/dialog_test.js
index f250ff0f8aa..7d4147d83f8 100644
--- a/tests/mocha/dialog_test.js
+++ b/tests/mocha/dialog_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/dropdowndiv_test.js b/tests/mocha/dropdowndiv_test.js
index fc792fbaf24..495237f18bc 100644
--- a/tests/mocha/dropdowndiv_test.js
+++ b/tests/mocha/dropdowndiv_test.js
@@ -6,7 +6,7 @@
 
 import {Rect} from '../../build/src/core/utils/rect.js';
 import * as style from '../../build/src/core/utils/style.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_block_change_test.js b/tests/mocha/event_block_change_test.js
index 7de0a23b607..9e1f9c3103e 100644
--- a/tests/mocha/event_block_change_test.js
+++ b/tests/mocha/event_block_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineMutatorBlocks} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_create_test.js b/tests/mocha/event_block_create_test.js
index f59f9435efd..1672b56bb98 100644
--- a/tests/mocha/event_block_create_test.js
+++ b/tests/mocha/event_block_create_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
diff --git a/tests/mocha/event_block_delete_test.js b/tests/mocha/event_block_delete_test.js
index d74b6aa062b..e2fb5b8ce88 100644
--- a/tests/mocha/event_block_delete_test.js
+++ b/tests/mocha/event_block_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_drag_test.js b/tests/mocha/event_block_drag_test.js
index 9b0f2031ad0..cc71e3bf084 100644
--- a/tests/mocha/event_block_drag_test.js
+++ b/tests/mocha/event_block_drag_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_field_intermediate_change_test.js b/tests/mocha/event_block_field_intermediate_change_test.js
index 0ff4e1bbf3c..d917dadcdd5 100644
--- a/tests/mocha/event_block_field_intermediate_change_test.js
+++ b/tests/mocha/event_block_field_intermediate_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_block_move_test.js b/tests/mocha/event_block_move_test.js
index b93457e14c1..6d1890eebeb 100644
--- a/tests/mocha/event_block_move_test.js
+++ b/tests/mocha/event_block_move_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_bubble_open_test.js b/tests/mocha/event_bubble_open_test.js
index 099a625f6e2..a445a6a7819 100644
--- a/tests/mocha/event_bubble_open_test.js
+++ b/tests/mocha/event_bubble_open_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineMutatorBlocks} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_click_test.js b/tests/mocha/event_click_test.js
index 6e18769485b..5c4afbcadf9 100644
--- a/tests/mocha/event_click_test.js
+++ b/tests/mocha/event_click_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_comment_change_test.js b/tests/mocha/event_comment_change_test.js
index ed5f4d9f6ae..edb539ef555 100644
--- a/tests/mocha/event_comment_change_test.js
+++ b/tests/mocha/event_comment_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_collapse_test.js b/tests/mocha/event_comment_collapse_test.js
index e2d27530708..5c3f61054a1 100644
--- a/tests/mocha/event_comment_collapse_test.js
+++ b/tests/mocha/event_comment_collapse_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_create_test.js b/tests/mocha/event_comment_create_test.js
index df919541d95..71ef8ed1b75 100644
--- a/tests/mocha/event_comment_create_test.js
+++ b/tests/mocha/event_comment_create_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_delete_test.js b/tests/mocha/event_comment_delete_test.js
index 2e2bb45c491..dd9f0dd2286 100644
--- a/tests/mocha/event_comment_delete_test.js
+++ b/tests/mocha/event_comment_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_drag_test.js b/tests/mocha/event_comment_drag_test.js
index d214e0adba1..f6685cc5bdf 100644
--- a/tests/mocha/event_comment_drag_test.js
+++ b/tests/mocha/event_comment_drag_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_move_test.js b/tests/mocha/event_comment_move_test.js
index aae3fdfe632..b3acea990a6 100644
--- a/tests/mocha/event_comment_move_test.js
+++ b/tests/mocha/event_comment_move_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_resize_test.js b/tests/mocha/event_comment_resize_test.js
index b74e1abb2bf..bed3e733a65 100644
--- a/tests/mocha/event_comment_resize_test.js
+++ b/tests/mocha/event_comment_resize_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_selected_test.js b/tests/mocha/event_selected_test.js
index 1ce8306db48..8731099ec96 100644
--- a/tests/mocha/event_selected_test.js
+++ b/tests/mocha/event_selected_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_test.js b/tests/mocha/event_test.js
index 7423f22f74b..a5019c8a978 100644
--- a/tests/mocha/event_test.js
+++ b/tests/mocha/event_test.js
@@ -6,7 +6,7 @@
 
 import * as Blockly from '../../build/src/core/blockly.js';
 import * as eventUtils from '../../build/src/core/events/utils.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventEquals,
   assertNthCallEventArgEquals,
diff --git a/tests/mocha/event_theme_change_test.js b/tests/mocha/event_theme_change_test.js
index f20f745b6a0..396347c9e13 100644
--- a/tests/mocha/event_theme_change_test.js
+++ b/tests/mocha/event_theme_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_toolbox_item_select_test.js b/tests/mocha/event_toolbox_item_select_test.js
index bf6a9a46212..02484c35bc1 100644
--- a/tests/mocha/event_toolbox_item_select_test.js
+++ b/tests/mocha/event_toolbox_item_select_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_trashcan_open_test.js b/tests/mocha/event_trashcan_open_test.js
index 2c809f2dfad..47da09a075a 100644
--- a/tests/mocha/event_trashcan_open_test.js
+++ b/tests/mocha/event_trashcan_open_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_create_test.js b/tests/mocha/event_var_create_test.js
index e374c496541..79af41281de 100644
--- a/tests/mocha/event_var_create_test.js
+++ b/tests/mocha/event_var_create_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_delete_test.js b/tests/mocha/event_var_delete_test.js
index b06943d9a19..93d9ef0ba2d 100644
--- a/tests/mocha/event_var_delete_test.js
+++ b/tests/mocha/event_var_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_rename_test.js b/tests/mocha/event_var_rename_test.js
index 7fbd185ab7b..b6d77cb35bd 100644
--- a/tests/mocha/event_var_rename_test.js
+++ b/tests/mocha/event_var_rename_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_type_change_test.js b/tests/mocha/event_var_type_change_test.js
index d19b0421a33..066c145a3ef 100644
--- a/tests/mocha/event_var_type_change_test.js
+++ b/tests/mocha/event_var_type_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_viewport_test.js b/tests/mocha/event_viewport_test.js
index edacc0da6cb..cd11079fa32 100644
--- a/tests/mocha/event_viewport_test.js
+++ b/tests/mocha/event_viewport_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/extensions_test.js b/tests/mocha/extensions_test.js
index 66772cbea4b..8c41861d5d8 100644
--- a/tests/mocha/extensions_test.js
+++ b/tests/mocha/extensions_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/field_checkbox_test.js b/tests/mocha/field_checkbox_test.js
index 08190fed823..74357338a5a 100644
--- a/tests/mocha/field_checkbox_test.js
+++ b/tests/mocha/field_checkbox_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   assertFieldValue,
diff --git a/tests/mocha/field_colour_test.js b/tests/mocha/field_colour_test.js
index 262f978f29d..975d5a01d4a 100644
--- a/tests/mocha/field_colour_test.js
+++ b/tests/mocha/field_colour_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_dropdown_test.js b/tests/mocha/field_dropdown_test.js
index e9bc159146d..a1731e81281 100644
--- a/tests/mocha/field_dropdown_test.js
+++ b/tests/mocha/field_dropdown_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_image_test.js b/tests/mocha/field_image_test.js
index a02b3f6b64a..f0358703bdf 100644
--- a/tests/mocha/field_image_test.js
+++ b/tests/mocha/field_image_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertFieldValue,
   runConstructorSuiteTests,
diff --git a/tests/mocha/field_label_serializable_test.js b/tests/mocha/field_label_serializable_test.js
index a831713412c..443cc6d1753 100644
--- a/tests/mocha/field_label_serializable_test.js
+++ b/tests/mocha/field_label_serializable_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_label_test.js b/tests/mocha/field_label_test.js
index cf5b4904493..bae600aff19 100644
--- a/tests/mocha/field_label_test.js
+++ b/tests/mocha/field_label_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createTestBlock} from './test_helpers/block_definitions.js';
 import {
   assertFieldValue,
diff --git a/tests/mocha/field_number_test.js b/tests/mocha/field_number_test.js
index 768766bf013..3c12fed820d 100644
--- a/tests/mocha/field_number_test.js
+++ b/tests/mocha/field_number_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {runTestCases} from './test_helpers/common.js';
 import {
diff --git a/tests/mocha/field_registry_test.js b/tests/mocha/field_registry_test.js
index 26b33c16c3d..1f19477dee1 100644
--- a/tests/mocha/field_registry_test.js
+++ b/tests/mocha/field_registry_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/field_test.js b/tests/mocha/field_test.js
index 38f9662d6d6..422b0473418 100644
--- a/tests/mocha/field_test.js
+++ b/tests/mocha/field_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addBlockTypeToCleanup,
   addMessageToCleanup,
diff --git a/tests/mocha/field_textinput_test.js b/tests/mocha/field_textinput_test.js
index 7dc105f72f0..7cafd00d948 100644
--- a/tests/mocha/field_textinput_test.js
+++ b/tests/mocha/field_textinput_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_variable_test.js b/tests/mocha/field_variable_test.js
index 2dc8d35a55c..58a20977521 100644
--- a/tests/mocha/field_variable_test.js
+++ b/tests/mocha/field_variable_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/flyout_test.js b/tests/mocha/flyout_test.js
index f6d3019df55..998279a0874 100644
--- a/tests/mocha/flyout_test.js
+++ b/tests/mocha/flyout_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/focus_manager_test.js b/tests/mocha/focus_manager_test.js
index 26dcb8dbe68..490fa4301b8 100644
--- a/tests/mocha/focus_manager_test.js
+++ b/tests/mocha/focus_manager_test.js
@@ -8,7 +8,7 @@ import {
   FocusManager,
   getFocusManager,
 } from '../../build/src/core/focus_manager.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/focusable_tree_traverser_test.js b/tests/mocha/focusable_tree_traverser_test.js
index 0f88e1106f9..a384dd4be45 100644
--- a/tests/mocha/focusable_tree_traverser_test.js
+++ b/tests/mocha/focusable_tree_traverser_test.js
@@ -6,7 +6,7 @@
 
 import {FocusManager} from '../../build/src/core/focus_manager.js';
 import {FocusableTreeTraverser} from '../../build/src/core/utils/focusable_tree_traverser.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/generator_test.js b/tests/mocha/generator_test.js
index 527448eacc9..3c377e7c1ab 100644
--- a/tests/mocha/generator_test.js
+++ b/tests/mocha/generator_test.js
@@ -10,7 +10,7 @@ import {JavascriptGenerator} from '../../build/src/generators/javascript/javascr
 import {LuaGenerator} from '../../build/src/generators/lua/lua_generator.js';
 import {PhpGenerator} from '../../build/src/generators/php/php_generator.js';
 import {PythonGenerator} from '../../build/src/generators/python/python_generator.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/gesture_test.js b/tests/mocha/gesture_test.js
index 3f53b8894b9..af4c599fea3 100644
--- a/tests/mocha/gesture_test.js
+++ b/tests/mocha/gesture_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineBasicBlockWithField} from './test_helpers/block_definitions.js';
 import {assertEventFired, assertEventNotFired} from './test_helpers/events.js';
 import {
diff --git a/tests/mocha/icon_test.js b/tests/mocha/icon_test.js
index 5855fcfc576..ba1b7116065 100644
--- a/tests/mocha/icon_test.js
+++ b/tests/mocha/icon_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineEmptyBlock} from './test_helpers/block_definitions.js';
 import {MockIcon, MockSerializableIcon} from './test_helpers/icon_mocks.js';
 import {
diff --git a/tests/mocha/input_test.js b/tests/mocha/input_test.js
index 0c2b0973eaf..dfa30858e0e 100644
--- a/tests/mocha/input_test.js
+++ b/tests/mocha/input_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/insertion_marker_test.js b/tests/mocha/insertion_marker_test.js
index 9ccf8a00b0f..f8215a847eb 100644
--- a/tests/mocha/insertion_marker_test.js
+++ b/tests/mocha/insertion_marker_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/jso_deserialization_test.js b/tests/mocha/jso_deserialization_test.js
index dfd3e62b7f2..f6b47d7de6a 100644
--- a/tests/mocha/jso_deserialization_test.js
+++ b/tests/mocha/jso_deserialization_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   MockParameterModel,
diff --git a/tests/mocha/jso_serialization_test.js b/tests/mocha/jso_serialization_test.js
index 7cf415e676a..4a7d5e9e1d3 100644
--- a/tests/mocha/jso_serialization_test.js
+++ b/tests/mocha/jso_serialization_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineRowBlock,
   defineStackBlock,
diff --git a/tests/mocha/json_test.js b/tests/mocha/json_test.js
index 471d2fb9711..2e4b68df9ec 100644
--- a/tests/mocha/json_test.js
+++ b/tests/mocha/json_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addMessageToCleanup,
   sharedTestSetup,
diff --git a/tests/mocha/keyboard_navigation_controller_test.js b/tests/mocha/keyboard_navigation_controller_test.js
index c7abd863ec1..dd81e9e4b45 100644
--- a/tests/mocha/keyboard_navigation_controller_test.js
+++ b/tests/mocha/keyboard_navigation_controller_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/layering_test.js b/tests/mocha/layering_test.js
index 1ef0ee6973d..b84f23252b3 100644
--- a/tests/mocha/layering_test.js
+++ b/tests/mocha/layering_test.js
@@ -3,7 +3,7 @@
  * Copyright 2023 Google LLC
  * SPDX-License-Identifier: Apache-2.0
  */
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/metrics_test.js b/tests/mocha/metrics_test.js
index 860e802550d..de9a5641ad7 100644
--- a/tests/mocha/metrics_test.js
+++ b/tests/mocha/metrics_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/mutator_test.js b/tests/mocha/mutator_test.js
index fb6d8caf09b..72b17d0a4bb 100644
--- a/tests/mocha/mutator_test.js
+++ b/tests/mocha/mutator_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createRenderedBlock,
   defineMutatorBlocks,
diff --git a/tests/mocha/names_test.js b/tests/mocha/names_test.js
index 732e28cd57a..e449a59fd6c 100644
--- a/tests/mocha/names_test.js
+++ b/tests/mocha/names_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/navigation_test.js b/tests/mocha/navigation_test.js
index 5bed2aaab8c..38dc88894b1 100644
--- a/tests/mocha/navigation_test.js
+++ b/tests/mocha/navigation_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/old_workspace_comment_test.js b/tests/mocha/old_workspace_comment_test.js
index 08a2523f50e..5038d67bad8 100644
--- a/tests/mocha/old_workspace_comment_test.js
+++ b/tests/mocha/old_workspace_comment_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/procedure_map_test.js b/tests/mocha/procedure_map_test.js
index eebd5a9f326..5e29c6ca050 100644
--- a/tests/mocha/procedure_map_test.js
+++ b/tests/mocha/procedure_map_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {MockProcedureModel} from './test_helpers/procedures.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/rect_test.js b/tests/mocha/rect_test.js
index 37712dff3a0..652837eaef6 100644
--- a/tests/mocha/rect_test.js
+++ b/tests/mocha/rect_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/registry_test.js b/tests/mocha/registry_test.js
index 6bcb8b5b077..2d5e22543ca 100644
--- a/tests/mocha/registry_test.js
+++ b/tests/mocha/registry_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/render_management_test.js b/tests/mocha/render_management_test.js
index 4de0635394b..94fa48805cf 100644
--- a/tests/mocha/render_management_test.js
+++ b/tests/mocha/render_management_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/serializer_test.js b/tests/mocha/serializer_test.js
index a3a3761e9c6..efd1f308b01 100644
--- a/tests/mocha/serializer_test.js
+++ b/tests/mocha/serializer_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   TestCase,
   TestSuite,
diff --git a/tests/mocha/shortcut_items_test.js b/tests/mocha/shortcut_items_test.js
index d96ddbfeadc..dfbae3f0901 100644
--- a/tests/mocha/shortcut_items_test.js
+++ b/tests/mocha/shortcut_items_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/shortcut_registry_test.js b/tests/mocha/shortcut_registry_test.js
index 5641e17c7d1..a06f01b9c00 100644
--- a/tests/mocha/shortcut_registry_test.js
+++ b/tests/mocha/shortcut_registry_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createTestBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/test_helpers/code_generation.js b/tests/mocha/test_helpers/code_generation.js
index 95bd902cd45..e61a45653b2 100644
--- a/tests/mocha/test_helpers/code_generation.js
+++ b/tests/mocha/test_helpers/code_generation.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestSuites} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/events.js b/tests/mocha/test_helpers/events.js
index c074bdd77a4..3e0b1e95d8b 100644
--- a/tests/mocha/test_helpers/events.js
+++ b/tests/mocha/test_helpers/events.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Creates spy for workspace fireChangeListener
diff --git a/tests/mocha/test_helpers/fields.js b/tests/mocha/test_helpers/fields.js
index e082abb4ccc..ab304a808a7 100644
--- a/tests/mocha/test_helpers/fields.js
+++ b/tests/mocha/test_helpers/fields.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestCases, TestCase} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/procedures.js b/tests/mocha/test_helpers/procedures.js
index ecf8c13adcc..16ef973350f 100644
--- a/tests/mocha/test_helpers/procedures.js
+++ b/tests/mocha/test_helpers/procedures.js
@@ -6,7 +6,7 @@
 
 import {ConnectionType} from '../../../build/src/core/connection_type.js';
 import {VariableModel} from '../../../build/src/core/variable_model.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Asserts that the procedure definition or call block has the expected var
diff --git a/tests/mocha/test_helpers/serialization.js b/tests/mocha/test_helpers/serialization.js
index c99f508d4dc..c476eae3d6f 100644
--- a/tests/mocha/test_helpers/serialization.js
+++ b/tests/mocha/test_helpers/serialization.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestCases} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/variables.js b/tests/mocha/test_helpers/variables.js
index 83f175f6327..dd19b4904c9 100644
--- a/tests/mocha/test_helpers/variables.js
+++ b/tests/mocha/test_helpers/variables.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Check if a variable with the given values exists.
diff --git a/tests/mocha/test_helpers/warnings.js b/tests/mocha/test_helpers/warnings.js
index 0e07f846c5a..d718a25c166 100644
--- a/tests/mocha/test_helpers/warnings.js
+++ b/tests/mocha/test_helpers/warnings.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Captures the strings sent to console.warn() when calling a function.
diff --git a/tests/mocha/test_helpers/workspace.js b/tests/mocha/test_helpers/workspace.js
index 917ce6f629e..b5f3cadabd3 100644
--- a/tests/mocha/test_helpers/workspace.js
+++ b/tests/mocha/test_helpers/workspace.js
@@ -5,7 +5,7 @@
  */
 
 import * as eventUtils from '../../../build/src/core/events/utils.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {workspaceTeardown} from './setup_teardown.js';
 import {assertVariableValues} from './variables.js';
 import {assertWarnings} from './warnings.js';
diff --git a/tests/mocha/theme_test.js b/tests/mocha/theme_test.js
index 1f425dca6a3..f54641a348f 100644
--- a/tests/mocha/theme_test.js
+++ b/tests/mocha/theme_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/toast_test.js b/tests/mocha/toast_test.js
index 45e02ad5de8..afb7f7f6cb9 100644
--- a/tests/mocha/toast_test.js
+++ b/tests/mocha/toast_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/toolbox_test.js b/tests/mocha/toolbox_test.js
index 4e92cd28fd3..480fdfdc6fc 100644
--- a/tests/mocha/toolbox_test.js
+++ b/tests/mocha/toolbox_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/tooltip_test.js b/tests/mocha/tooltip_test.js
index 1edc8ad6e25..0695b9ebe03 100644
--- a/tests/mocha/tooltip_test.js
+++ b/tests/mocha/tooltip_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/touch_test.js b/tests/mocha/touch_test.js
index 775665643b7..30a9fe72724 100644
--- a/tests/mocha/touch_test.js
+++ b/tests/mocha/touch_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/trashcan_test.js b/tests/mocha/trashcan_test.js
index 5486326f1e0..d96e00f3a21 100644
--- a/tests/mocha/trashcan_test.js
+++ b/tests/mocha/trashcan_test.js
@@ -6,7 +6,7 @@
 
 import {EventType} from '../../build/src/core/events/type.js';
 import * as eventUtils from '../../build/src/core/events/utils.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineBasicBlockWithField,
   defineMutatorBlocks,
diff --git a/tests/mocha/utils_test.js b/tests/mocha/utils_test.js
index b6228448db7..accf164b79b 100644
--- a/tests/mocha/utils_test.js
+++ b/tests/mocha/utils_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/variable_map_test.js b/tests/mocha/variable_map_test.js
index 2d6cee0b94a..76dffbe9dc7 100644
--- a/tests/mocha/variable_map_test.js
+++ b/tests/mocha/variable_map_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   assertEventNotFired,
diff --git a/tests/mocha/variable_model_test.js b/tests/mocha/variable_model_test.js
index cd2a89db420..eee7ea9bf41 100644
--- a/tests/mocha/variable_model_test.js
+++ b/tests/mocha/variable_model_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/widget_div_test.js b/tests/mocha/widget_div_test.js
index 61c94247110..4ad31f96c72 100644
--- a/tests/mocha/widget_div_test.js
+++ b/tests/mocha/widget_div_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/workspace_comment_test.js b/tests/mocha/workspace_comment_test.js
index 3ce276e8579..bb87ad82ac6 100644
--- a/tests/mocha/workspace_comment_test.js
+++ b/tests/mocha/workspace_comment_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   createChangeListenerSpy,
diff --git a/tests/mocha/workspace_svg_test.js b/tests/mocha/workspace_svg_test.js
index 207cad45dc7..6193dda2db7 100644
--- a/tests/mocha/workspace_svg_test.js
+++ b/tests/mocha/workspace_svg_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   assertEventFired,
diff --git a/tests/mocha/xml_test.js b/tests/mocha/xml_test.js
index 218324197bf..cd1bce128bb 100644
--- a/tests/mocha/xml_test.js
+++ b/tests/mocha/xml_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addBlockTypeToCleanup,
   createGenUidStubWithReturns,
diff --git a/tests/mocha/zoom_controls_test.js b/tests/mocha/zoom_controls_test.js
index dedc36b75b4..d9bb0f91e9b 100644
--- a/tests/mocha/zoom_controls_test.js
+++ b/tests/mocha/zoom_controls_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired, assertEventNotFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,

From e5eada84318c8f85f8a8ff83556691423c2e7f5d Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Wed, 27 Aug 2025 19:12:06 +0100
Subject: [PATCH 26/52] chore(deps): bump eslint from 9.30.0 to 9.34.0 (#9329)

Bumps [eslint](https://github.com/eslint/eslint) from 9.30.0 to 9.34.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v9.30.0...v9.34.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 9.34.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 60 +++++++++++++++++++++--------------------------
 1 file changed, 27 insertions(+), 33 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 287be1f1f97..345e4271927 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -445,19 +445,21 @@
       }
     },
     "node_modules/@eslint/config-helpers": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/@eslint/config-helpers/-/config-helpers-0.3.0.tgz",
-      "integrity": "sha512-ViuymvFmcJi04qdZeDc2whTHryouGcDlaxPqarTD0ZE10ISpxGUVZGZDx4w01upyIynL3iu6IXH2bS1NhclQMw==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@eslint/config-helpers/-/config-helpers-0.3.1.tgz",
+      "integrity": "sha512-xR93k9WhrDYpXHORXpxVL5oHj3Era7wo6k/Wd8/IsQNnZUTzkGS29lyn3nAT05v6ltUuTFVCCYDEGfy2Or/sPA==",
       "dev": true,
+      "license": "Apache-2.0",
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
     "node_modules/@eslint/core": {
-      "version": "0.14.0",
-      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.14.0.tgz",
-      "integrity": "sha512-qIbV0/JZr7iSDjqAc60IqbLdsj9GDt16xQtWD+B78d/HAlvysGdZZ6rpJHGAc2T0FQx1X6thsSPdnoiGKdNtdg==",
+      "version": "0.15.2",
+      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.2.tgz",
+      "integrity": "sha512-78Md3/Rrxh83gCxoUc0EiciuOHsIITzLy53m3d9UyiW8y9Dj2D29FeETqyKA+BRK76tnTp6RXWb3pCay8Oyomg==",
       "dev": true,
+      "license": "Apache-2.0",
       "dependencies": {
         "@types/json-schema": "^7.0.15"
       },
@@ -527,10 +529,11 @@
       "license": "MIT"
     },
     "node_modules/@eslint/js": {
-      "version": "9.30.0",
-      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.30.0.tgz",
-      "integrity": "sha512-Wzw3wQwPvc9sHM+NjakWTcPx11mbZyiYHuwWa/QfZ7cIRX7WK54PSk7bdyXDaoaopUcMatv1zaQvOAAO8hCdww==",
+      "version": "9.34.0",
+      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.34.0.tgz",
+      "integrity": "sha512-EoyvqQnBNsV1CWaEJ559rxXL4c8V92gxirbawSmVUOWXlsRxxQXl6LmCpdUblgxgSkDIqKnhzba2SjRTI/A5Rw==",
       "dev": true,
+      "license": "MIT",
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       },
@@ -548,30 +551,19 @@
       }
     },
     "node_modules/@eslint/plugin-kit": {
-      "version": "0.3.3",
-      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.3.tgz",
-      "integrity": "sha512-1+WqvgNMhmlAambTvT3KPtCl/Ibr68VldY2XY40SL1CE0ZXiakFR/cbTspaF5HsnpDMvcYYoJHfl4980NBjGag==",
+      "version": "0.3.5",
+      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.5.tgz",
+      "integrity": "sha512-Z5kJ+wU3oA7MMIqVR9tyZRtjYPr4OC004Q4Rw7pgOKUOKkJfZ3O24nz3WYfGRpMDNmcOi3TwQOmgm7B7Tpii0w==",
       "dev": true,
+      "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/core": "^0.15.1",
+        "@eslint/core": "^0.15.2",
         "levn": "^0.4.1"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
-    "node_modules/@eslint/plugin-kit/node_modules/@eslint/core": {
-      "version": "0.15.1",
-      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.1.tgz",
-      "integrity": "sha512-bkOp+iumZCCbt1K1CmWf0R9pM5yKpDv+ZXtvSyQpudrI9kuFLp+bM2WOPXImuD/ceQuaa8f5pj93Y7zyECIGNA==",
-      "dev": true,
-      "dependencies": {
-        "@types/json-schema": "^7.0.15"
-      },
-      "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
-      }
-    },
     "node_modules/@gulp-sourcemaps/identity-map": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/@gulp-sourcemaps/identity-map/-/identity-map-2.0.1.tgz",
@@ -1528,7 +1520,8 @@
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
       "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
-      "dev": true
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/node": {
       "version": "20.16.3",
@@ -3970,19 +3963,20 @@
       }
     },
     "node_modules/eslint": {
-      "version": "9.30.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.30.0.tgz",
-      "integrity": "sha512-iN/SiPxmQu6EVkf+m1qpBxzUhE12YqFLOSySuOyVLJLEF9nzTf+h/1AJYc1JWzCnktggeNrjvQGLngDzXirU6g==",
+      "version": "9.34.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.34.0.tgz",
+      "integrity": "sha512-RNCHRX5EwdrESy3Jc9o8ie8Bog+PeYvvSR8sDGoZxNFTvZ4dlxUB3WzQ3bQMztFrSRODGrLLj8g6OFuGY/aiQg==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.12.1",
         "@eslint/config-array": "^0.21.0",
-        "@eslint/config-helpers": "^0.3.0",
-        "@eslint/core": "^0.14.0",
+        "@eslint/config-helpers": "^0.3.1",
+        "@eslint/core": "^0.15.2",
         "@eslint/eslintrc": "^3.3.1",
-        "@eslint/js": "9.30.0",
-        "@eslint/plugin-kit": "^0.3.1",
+        "@eslint/js": "9.34.0",
+        "@eslint/plugin-kit": "^0.3.5",
         "@humanfs/node": "^0.16.6",
         "@humanwhocodes/module-importer": "^1.0.1",
         "@humanwhocodes/retry": "^0.4.2",

From 3d28ca8448df4d496090f6828ee1a8276c0b87da Mon Sep 17 00:00:00 2001
From: Christopher Allen <cpcallen+git@google.com>
Date: Wed, 27 Aug 2025 19:18:20 +0100
Subject: [PATCH 27/52] chore: Add node.js v24 to CI build matrix (#9219)

Node.js v24 has now been released, so add it to our build matrix.

Node v18 is no longer in LTS but we want to continue to test on
it until it is removed from package.json engines.
---
 .github/workflows/build.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d7a4e786ce6..cdec5308279 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
         # TODO (#2114): re-enable osx build.
         # os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [18.x, 20.x, 22.x, 24.x]
         # See supported Node.js release schedule at
         # https://nodejs.org/en/about/releases/
 

From b2bbe965ba621e17f100787b3aa72fbfaab21dea Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 27 Aug 2025 12:28:06 -0700
Subject: [PATCH 28/52] fix: Prevent mocha tests failures when window does not
 have focus. (#9332)

* chore: Add puppeteer-core as a dev dependency.

* fix: Make mocha tests run in a fake-focused window.

* fix: Make `test:mocha:interactive` use the same gulp codepath as `test`.
---
 gulpfile.mjs                     |  7 ++-
 package-lock.json                | 89 +++++++++++++++++++++++++++-----
 package.json                     |  3 +-
 scripts/gulpfiles/test_tasks.mjs | 12 ++++-
 tests/mocha/webdriver.js         | 18 ++++++-
 5 files changed, 111 insertions(+), 18 deletions(-)

diff --git a/gulpfile.mjs b/gulpfile.mjs
index fd3de3bde8c..ad61bcb516d 100644
--- a/gulpfile.mjs
+++ b/gulpfile.mjs
@@ -45,7 +45,11 @@ import {
   publishBeta,
   recompile,
 } from './scripts/gulpfiles/release_tasks.mjs';
-import {generators, test} from './scripts/gulpfiles/test_tasks.mjs';
+import {
+  generators,
+  interactiveMocha,
+  test,
+} from './scripts/gulpfiles/test_tasks.mjs';
 
 const clean = parallel(cleanBuildDir, cleanReleaseDir);
 
@@ -80,6 +84,7 @@ export {
   clean,
   test,
   generators as testGenerators,
+  interactiveMocha,
   buildAdvancedCompilationTest,
   createRC as gitCreateRC,
   docs,
diff --git a/package-lock.json b/package-lock.json
index 345e4271927..61111110180 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -51,6 +51,7 @@
         "patch-package": "^8.0.0",
         "prettier": "^3.3.3",
         "prettier-plugin-organize-imports": "^4.0.0",
+        "puppeteer-core": "^24.17.0",
         "readline-sync": "^1.4.10",
         "rimraf": "^5.0.0",
         "typescript": "^5.3.3",
@@ -1282,18 +1283,18 @@
       }
     },
     "node_modules/@puppeteer/browsers": {
-      "version": "2.10.4",
-      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.10.4.tgz",
-      "integrity": "sha512-9DxbZx+XGMNdjBynIs4BRSz+M3iRDeB7qRcAr6UORFLphCIM2x3DXgOucvADiifcqCE4XePFUKcnaAMyGbrDlQ==",
+      "version": "2.10.7",
+      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.10.7.tgz",
+      "integrity": "sha512-wHWLkQWBjHtajZeqCB74nsa/X70KheyOhySYBRmVQDJiNj0zjZR/naPCvdWjMhcG1LmjaMV/9WtTo5mpe8qWLw==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "debug": "^4.4.0",
+        "debug": "^4.4.1",
         "extract-zip": "^2.0.1",
         "progress": "^2.0.3",
         "proxy-agent": "^6.5.0",
-        "semver": "^7.7.1",
-        "tar-fs": "^3.0.8",
+        "semver": "^7.7.2",
+        "tar-fs": "^3.1.0",
         "yargs": "^17.7.2"
       },
       "bin": {
@@ -2960,6 +2961,20 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/chromium-bidi": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/chromium-bidi/-/chromium-bidi-8.0.0.tgz",
+      "integrity": "sha512-d1VmE0FD7lxZQHzcDUCKZSNRtRwISXDsdg4HjdTR5+Ll5nQ/vzU12JeNmupD6VWffrPSlrnGhEWlLESKH3VO+g==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "mitt": "^3.0.1",
+        "zod": "^3.24.1"
+      },
+      "peerDependencies": {
+        "devtools-protocol": "*"
+      }
+    },
     "node_modules/ci-info": {
       "version": "3.8.0",
       "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-3.8.0.tgz",
@@ -3612,6 +3627,13 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/devtools-protocol": {
+      "version": "0.0.1475386",
+      "resolved": "https://registry.npmjs.org/devtools-protocol/-/devtools-protocol-0.0.1475386.tgz",
+      "integrity": "sha512-RQ809ykTfJ+dgj9bftdeL2vRVxASAuGU+I9LEx9Ij5TXU5HrgAQVmzi72VA+mkzscE12uzlRv5/tWWv9R9J1SA==",
+      "dev": true,
+      "license": "BSD-3-Clause"
+    },
     "node_modules/diff": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/diff/-/diff-7.0.0.tgz",
@@ -6895,6 +6917,13 @@
         "node": ">=16 || 14 >=14.17"
       }
     },
+    "node_modules/mitt": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/mitt/-/mitt-3.0.1.tgz",
+      "integrity": "sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/mkdirp": {
       "version": "0.5.6",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
@@ -7925,6 +7954,24 @@
         "node": ">=6"
       }
     },
+    "node_modules/puppeteer-core": {
+      "version": "24.17.0",
+      "resolved": "https://registry.npmjs.org/puppeteer-core/-/puppeteer-core-24.17.0.tgz",
+      "integrity": "sha512-RYOBKFiF+3RdwIZTEacqNpD567gaFcBAOKTT7742FdB1icXudrPI7BlZbYTYWK2wgGQUXt9Zi1Yn+D5PmCs4CA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@puppeteer/browsers": "2.10.7",
+        "chromium-bidi": "8.0.0",
+        "debug": "^4.4.1",
+        "devtools-protocol": "0.0.1475386",
+        "typed-query-selector": "^2.12.0",
+        "ws": "^8.18.3"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/qs": {
       "version": "6.14.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
@@ -8993,9 +9040,9 @@
       }
     },
     "node_modules/tar-fs": {
-      "version": "3.0.9",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.0.9.tgz",
-      "integrity": "sha512-XF4w9Xp+ZQgifKakjZYmFdkLoSWd34VGKcsTCwlNWM7QG3ZbaxnTsaBwnjFZqHRf/rROxaR8rXnbtwdvaDI+lA==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.1.0.tgz",
+      "integrity": "sha512-5Mty5y/sOF1YWj1J6GiBodjlDc05CUR8PKXrsnFAiSG0xA+GHeWLovaZPYUDXkH/1iKRf2+M5+OrRgzC7O9b7w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -9212,6 +9259,13 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/typed-query-selector": {
+      "version": "2.12.0",
+      "resolved": "https://registry.npmjs.org/typed-query-selector/-/typed-query-selector-2.12.0.tgz",
+      "integrity": "sha512-SbklCd1F0EiZOyPiW192rrHZzZ5sBijB6xM+cpmrwDqObvdtunOHHIk9fCGsoK5JVIYXoyEp4iEdE3upFH3PAg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/typedarray": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
@@ -9773,9 +9827,10 @@
       "dev": true
     },
     "node_modules/ws": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
-      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
+      "license": "MIT",
       "engines": {
         "node": ">=10.0.0"
       },
@@ -10029,6 +10084,16 @@
       "dependencies": {
         "safe-buffer": "~5.2.0"
       }
+    },
+    "node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 29865b98659..3f45191f3ee 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "test": "gulp test",
     "test:browser": "cd tests/browser && npx mocha",
     "test:generators": "gulp testGenerators",
-    "test:mocha:interactive": "npm run build && concurrently -n tsc,server \"tsc --watch --preserveWatchOutput --outDir \"build/src\" --declarationDir \"build/declarations\"\" \"http-server ./ -o /tests/mocha/index.html -c-1\"",
+    "test:mocha:interactive": "npm run build && concurrently -n tsc,server \"tsc --watch --preserveWatchOutput --outDir \"build/src\" --declarationDir \"build/declarations\"\" \"gulp interactiveMocha\"",
     "test:compile:advanced": "gulp buildAdvancedCompilationTest --debug",
     "updateGithubPages": "npm ci && gulp gitUpdateGithubPages"
   },
@@ -138,6 +138,7 @@
     "patch-package": "^8.0.0",
     "prettier": "^3.3.3",
     "prettier-plugin-organize-imports": "^4.0.0",
+    "puppeteer-core": "^24.17.0",
     "readline-sync": "^1.4.10",
     "rimraf": "^5.0.0",
     "typescript": "^5.3.3",
diff --git a/scripts/gulpfiles/test_tasks.mjs b/scripts/gulpfiles/test_tasks.mjs
index d4b73cdb3c1..37f9884440d 100644
--- a/scripts/gulpfiles/test_tasks.mjs
+++ b/scripts/gulpfiles/test_tasks.mjs
@@ -257,9 +257,9 @@ async function metadata() {
  * Run Mocha tests inside a browser.
  * @return {Promise} Asynchronous result.
  */
-async function mocha() {
+async function mocha(exitOnCompletion = true) {
   return runTestTask('mocha', async () => {
-    const result = await runMochaTestsInBrowser().catch(e => {
+    const result = await runMochaTestsInBrowser(exitOnCompletion).catch(e => {
       throw e;
     });
     if (result) {
@@ -269,6 +269,14 @@ async function mocha() {
   });
 }
 
+/**
+ * Run Mocha tests inside a browser and keep the browser open upon completion.
+ * @return {Promise} Asynchronous result.
+ */
+export async function interactiveMocha() {
+  return mocha(false);
+}
+
 /**
  * Helper method for comparison file.
  * @param {string} file1 First target file.
diff --git a/tests/mocha/webdriver.js b/tests/mocha/webdriver.js
index 207917c5e6b..06e7a3e6585 100644
--- a/tests/mocha/webdriver.js
+++ b/tests/mocha/webdriver.js
@@ -15,9 +15,12 @@ const {posixPath} = require('../../scripts/helpers');
  * Runs the Mocha tests in this directory in Chrome. It uses webdriverio to
  * launch Chrome and load index.html. Outputs a summary of the test results
  * to the console.
+ *
+ * @param {boolean} exitOnCompletetion True if the browser should automatically
+ *     quit after tests have finished running.
  * @return {number} 0 on success, 1 on failure.
  */
-async function runMochaTestsInBrowser() {
+async function runMochaTestsInBrowser(exitOnCompletion = true) {
   const options = {
     capabilities: {
       browserName: 'chrome',
@@ -45,6 +48,17 @@ async function runMochaTestsInBrowser() {
   console.log('Loading URL: ' + url);
   await browser.url(url);
 
+  // Toggle the devtools setting to emulate focus, so that the window will
+  // always act as if it has focus regardless of the state of the window manager
+  // or operating system. This improves the reliability of FocusManager-related
+  // tests.
+  const puppeteer = await browser.getPuppeteer();
+  await browser.call(async () => {
+    const page = (await puppeteer.pages())[0];
+    const session = await page.createCDPSession();
+    await session.send('Emulation.setFocusEmulationEnabled', { enabled: true });
+  });
+
   await browser.waitUntil(async() => {
     const elem = await browser.$('#failureCount');
     const text = await elem.getAttribute('tests_failed');
@@ -74,7 +88,7 @@ async function runMochaTestsInBrowser() {
   if (parseInt(numOfFailure) !== 0) {
     return 1;
   }
-  await browser.deleteSession();
+  if (exitOnCompletion) await browser.deleteSession();
   return 0;
 }
 

From fd0aaedb10d77e672e2692ee96487bf304923d69 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 28 Aug 2025 10:06:52 -0700
Subject: [PATCH 29/52] fix: Fix bug that could cause errant line when
 rendering. (#9333)

---
 core/renderers/common/drawer.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/core/renderers/common/drawer.ts b/core/renderers/common/drawer.ts
index 7046406adc7..c474bc8c339 100644
--- a/core/renderers/common/drawer.ts
+++ b/core/renderers/common/drawer.ts
@@ -122,9 +122,12 @@ export class Drawer {
       } else if (Types.isSpacer(elem)) {
         this.outlinePath_ += svgPaths.lineOnAxis('h', elem.width);
       }
+      // No branch for a square corner, because it's a no-op.
     }
-    // No branch for a square corner, because it's a no-op.
-    this.outlinePath_ += svgPaths.lineOnAxis('v', topRow.height);
+    this.outlinePath_ += svgPaths.lineOnAxis(
+      'v',
+      topRow.height - topRow.ascenderHeight,
+    );
   }
 
   /**

From 47307a9e5358de8c48e315218ea9efb3041fa8ac Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 28 Aug 2025 11:28:40 -0700
Subject: [PATCH 30/52] refactor: Make focusable elements responsible for
 scrolling themselves into bounds. (#9288)

* refactor: Make focusable elements responsible for scrolling themselves into bounds.

* chore: Add tests for scrolling focused elements into view.

* fix: Removed inadvertent `.only`.

* fix: Scroll parent block of connections into bounds on focus.
---
 core/block_svg.ts                            |   3 +
 core/bubbles/bubble.ts                       |   4 +
 core/comments/comment_bar_button.ts          |   8 +-
 core/comments/comment_editor.ts              |  13 +-
 core/comments/rendered_workspace_comment.ts  |   1 +
 core/field.ts                                |   7 +-
 core/flyout_button.ts                        |   6 +-
 core/icons/icon.ts                           |  12 +-
 core/keyboard_nav/line_cursor.ts             |  30 +--
 core/rendered_connection.ts                  |   7 +-
 tests/browser/test/basic_playground_test.mjs | 221 +++++++++++++++++++
 11 files changed, 276 insertions(+), 36 deletions(-)

diff --git a/core/block_svg.ts b/core/block_svg.ts
index c6065282a5c..b3fdeb2d6b6 100644
--- a/core/block_svg.ts
+++ b/core/block_svg.ts
@@ -1844,6 +1844,9 @@ export class BlockSvg
   /** See IFocusableNode.onNodeFocus. */
   onNodeFocus(): void {
     this.select();
+    this.workspace.scrollBoundsIntoView(
+      this.getBoundingRectangleWithoutChildren(),
+    );
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/bubbles/bubble.ts b/core/bubbles/bubble.ts
index c42e602544e..742d300adf1 100644
--- a/core/bubbles/bubble.ts
+++ b/core/bubbles/bubble.ts
@@ -707,6 +707,10 @@ export abstract class Bubble implements IBubble, ISelectable, IFocusableNode {
   onNodeFocus(): void {
     this.select();
     this.bringToFront();
+    const xy = this.getRelativeToSurfaceXY();
+    const size = this.getSize();
+    const bounds = new Rect(xy.y, xy.y + size.height, xy.x, xy.x + size.width);
+    this.workspace.scrollBoundsIntoView(bounds);
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/comments/comment_bar_button.ts b/core/comments/comment_bar_button.ts
index 24a084ad26e..be130b0e335 100644
--- a/core/comments/comment_bar_button.ts
+++ b/core/comments/comment_bar_button.ts
@@ -87,7 +87,13 @@ export abstract class CommentBarButton implements IFocusableNode {
   }
 
   /** Called when this button's focusable DOM element gains focus. */
-  onNodeFocus() {}
+  onNodeFocus() {
+    const commentView = this.getCommentView();
+    const xy = commentView.getRelativeToSurfaceXY();
+    const size = commentView.getSize();
+    const bounds = new Rect(xy.y, xy.y + size.height, xy.x, xy.x + size.width);
+    commentView.workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** Called when this button's focusable DOM element loses focus. */
   onNodeBlur() {}
diff --git a/core/comments/comment_editor.ts b/core/comments/comment_editor.ts
index ac1559c4b3d..b4c741ba1ad 100644
--- a/core/comments/comment_editor.ts
+++ b/core/comments/comment_editor.ts
@@ -10,8 +10,10 @@ import {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import {IFocusableTree} from '../interfaces/i_focusable_tree.js';
 import * as touch from '../touch.js';
 import * as dom from '../utils/dom.js';
+import {Rect} from '../utils/rect.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
+import * as svgMath from '../utils/svg_math.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
 
 /**
@@ -188,7 +190,16 @@ export class CommentEditor implements IFocusableNode {
   getFocusableTree(): IFocusableTree {
     return this.workspace;
   }
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const bbox = Rect.from(this.foreignObject.getBoundingClientRect());
+    this.workspace.scrollBoundsIntoView(
+      Rect.createFromPoint(
+        svgMath.screenToWsCoordinates(this.workspace, bbox.getOrigin()),
+        bbox.getWidth(),
+        bbox.getHeight(),
+      ),
+    );
+  }
   onNodeBlur(): void {}
   canBeFocused(): boolean {
     if (this.id) return true;
diff --git a/core/comments/rendered_workspace_comment.ts b/core/comments/rendered_workspace_comment.ts
index 49c75e60883..2903bff4bce 100644
--- a/core/comments/rendered_workspace_comment.ts
+++ b/core/comments/rendered_workspace_comment.ts
@@ -347,6 +347,7 @@ export class RenderedWorkspaceComment
     this.select();
     // Ensure that the comment is always at the top when focused.
     this.workspace.getLayerManager()?.append(this, layers.BLOCK);
+    this.workspace.scrollBoundsIntoView(this.getBoundingRectangle());
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/field.ts b/core/field.ts
index d993e197d23..e025efab709 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -1380,7 +1380,12 @@ export abstract class Field<T = any>
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const block = this.getSourceBlock() as BlockSvg;
+    block.workspace.scrollBoundsIntoView(
+      block.getBoundingRectangleWithoutChildren(),
+    );
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/flyout_button.ts b/core/flyout_button.ts
index c9afb8b0159..5a066a23b11 100644
--- a/core/flyout_button.ts
+++ b/core/flyout_button.ts
@@ -398,7 +398,11 @@ export class FlyoutButton
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const xy = this.getPosition();
+    const bounds = new Rect(xy.y, xy.y + this.height, xy.x, xy.x + this.width);
+    this.workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/icons/icon.ts b/core/icons/icon.ts
index 8f8ff70fc32..f5f76603875 100644
--- a/core/icons/icon.ts
+++ b/core/icons/icon.ts
@@ -14,6 +14,7 @@ import * as tooltip from '../tooltip.js';
 import {Coordinate} from '../utils/coordinate.js';
 import * as dom from '../utils/dom.js';
 import * as idGenerator from '../utils/idgenerator.js';
+import {Rect} from '../utils/rect.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
 import type {WorkspaceSvg} from '../workspace_svg.js';
@@ -168,7 +169,16 @@ export abstract class Icon implements IIcon {
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const blockBounds = (this.sourceBlock as BlockSvg).getBoundingRectangle();
+    const bounds = new Rect(
+      blockBounds.top + this.offsetInBlock.y,
+      blockBounds.top + this.offsetInBlock.y + this.getSize().height,
+      blockBounds.left + this.offsetInBlock.x,
+      blockBounds.left + this.offsetInBlock.x + this.getSize().width,
+    );
+    (this.sourceBlock as BlockSvg).workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/keyboard_nav/line_cursor.ts b/core/keyboard_nav/line_cursor.ts
index 13e5a729d0f..30770e47d2d 100644
--- a/core/keyboard_nav/line_cursor.ts
+++ b/core/keyboard_nav/line_cursor.ts
@@ -14,14 +14,11 @@
  */
 
 import {BlockSvg} from '../block_svg.js';
-import {CommentBarButton} from '../comments/comment_bar_button.js';
 import {RenderedWorkspaceComment} from '../comments/rendered_workspace_comment.js';
-import {Field} from '../field.js';
 import {getFocusManager} from '../focus_manager.js';
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import * as registry from '../registry.js';
-import {Rect} from '../utils/rect.js';
-import {WorkspaceSvg} from '../workspace_svg.js';
+import type {WorkspaceSvg} from '../workspace_svg.js';
 import {Marker} from './marker.js';
 
 /**
@@ -392,31 +389,6 @@ export class LineCursor extends Marker {
    */
   setCurNode(newNode: IFocusableNode) {
     getFocusManager().focusNode(newNode);
-
-    // Try to scroll cursor into view.
-    if (newNode instanceof BlockSvg) {
-      newNode.workspace.scrollBoundsIntoView(
-        newNode.getBoundingRectangleWithoutChildren(),
-      );
-    } else if (newNode instanceof Field) {
-      const block = newNode.getSourceBlock() as BlockSvg;
-      block.workspace.scrollBoundsIntoView(
-        block.getBoundingRectangleWithoutChildren(),
-      );
-    } else if (newNode instanceof RenderedWorkspaceComment) {
-      newNode.workspace.scrollBoundsIntoView(newNode.getBoundingRectangle());
-    } else if (newNode instanceof CommentBarButton) {
-      const commentView = newNode.getCommentView();
-      const xy = commentView.getRelativeToSurfaceXY();
-      const size = commentView.getSize();
-      const bounds = new Rect(
-        xy.y,
-        xy.y + size.height,
-        xy.x,
-        xy.x + size.width,
-      );
-      commentView.workspace.scrollBoundsIntoView(bounds);
-    }
   }
 
   /**
diff --git a/core/rendered_connection.ts b/core/rendered_connection.ts
index 84905eeccc2..4a53048bc84 100644
--- a/core/rendered_connection.ts
+++ b/core/rendered_connection.ts
@@ -644,6 +644,9 @@ export class RenderedConnection
   /** See IFocusableNode.onNodeFocus. */
   onNodeFocus(): void {
     this.highlight();
+    this.getSourceBlock().workspace.scrollBoundsIntoView(
+      this.getSourceBlock().getBoundingRectangleWithoutChildren(),
+    );
   }
 
   /** See IFocusableNode.onNodeBlur. */
@@ -656,12 +659,12 @@ export class RenderedConnection
     return true;
   }
 
-  private findHighlightSvg(): SVGElement | null {
+  private findHighlightSvg(): SVGPathElement | null {
     // This cast is valid as TypeScript's definition is wrong. See:
     // https://github.com/microsoft/TypeScript/issues/60996.
     return document.getElementById(this.id) as
       | unknown
-      | null as SVGElement | null;
+      | null as SVGPathElement | null;
   }
 }
 
diff --git a/tests/browser/test/basic_playground_test.mjs b/tests/browser/test/basic_playground_test.mjs
index c7c8a5a370c..72b3894a6a3 100644
--- a/tests/browser/test/basic_playground_test.mjs
+++ b/tests/browser/test/basic_playground_test.mjs
@@ -238,3 +238,224 @@ suite('Disabling', function () {
     },
   );
 });
+
+suite('Focused nodes are scrolled into bounds', function () {
+  // Setting timeout to unlimited as the webdriver takes a longer time to run
+  // than most mocha tests.
+  this.timeout(0);
+
+  // Setup Selenium for all of the tests
+  suiteSetup(async function () {
+    this.browser = await testSetup(testFileLocations.PLAYGROUND);
+    await this.browser.execute(() => {
+      window.focusScrollTest = async (testcase) => {
+        const workspace = Blockly.getMainWorkspace();
+        const metrics = workspace.getMetricsManager();
+        const initialViewport = metrics.getViewMetrics(true);
+        const elementBounds = await testcase(workspace);
+        await Blockly.renderManagement.finishQueuedRenders();
+        const scrolledViewport = metrics.getViewMetrics(true);
+        const workspaceBounds = new Blockly.utils.Rect(
+          scrolledViewport.top,
+          scrolledViewport.top + scrolledViewport.height,
+          scrolledViewport.left,
+          scrolledViewport.left + scrolledViewport.width,
+        );
+        return {
+          changed:
+            JSON.stringify(initialViewport) !==
+            JSON.stringify(scrolledViewport),
+          intersects: elementBounds.intersects(workspaceBounds),
+          contains: workspaceBounds.contains(
+            elementBounds.getOrigin().x,
+            elementBounds.getOrigin().y,
+          ),
+          elementBounds,
+          workspaceBounds,
+        };
+      };
+    });
+  });
+
+  setup(async function () {
+    await this.browser.execute(() => {
+      Blockly.serialization.blocks.append(
+        {
+          'type': 'text',
+          'x': -500,
+          'y': -500,
+        },
+        Blockly.getMainWorkspace(),
+      );
+      Blockly.serialization.blocks.append(
+        {
+          'type': 'controls_if',
+          'x': 500,
+          'y': 500,
+        },
+        Blockly.getMainWorkspace(),
+      );
+      Blockly.getMainWorkspace().zoomCenter(1);
+    });
+  });
+
+  test('Focused blocks scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        Blockly.getFocusManager().focusNode(block);
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Focused bubbles scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        block.setCommentText('hello world');
+        const icon = block.getIcon(Blockly.icons.IconType.COMMENT);
+        icon.setBubbleVisible(true);
+        await Blockly.renderManagement.finishQueuedRenders();
+        icon.setBubbleLocation(new Blockly.utils.Coordinate(-510, -510));
+        Blockly.getFocusManager().focusNode(icon.getBubble());
+        const xy = icon.getBubble().getRelativeToSurfaceXY();
+        const size = icon.getBubble().getSize();
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Comment bar buttons scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-300, 500));
+        const commentBarButton = comment.view.getCommentBarButtons()[0];
+        Blockly.getFocusManager().focusNode(commentBarButton);
+        const xy = comment.view.getRelativeToSurfaceXY();
+        const size = comment.view.getSize();
+        // Comment bar buttons scroll their parent comment view into view.
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Comment editors scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-300, 500));
+        const commentEditor = comment.view.getEditorFocusableNode();
+        Blockly.getFocusManager().focusNode(commentEditor);
+        // Comment editor bounds can't be calculated externally since they
+        // depend on private properties, but the comment view is a reasonable
+        // proxy.
+        const xy = comment.view.getRelativeToSurfaceXY();
+        const size = comment.view.getSize();
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Workspace comments scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-500, 500));
+        Blockly.getFocusManager().focusNode(comment);
+        return comment.getBoundingRectangle();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Icons scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        block.setWarningText('this is bad');
+        const icon = block.getIcon(Blockly.icons.IconType.WARNING);
+        Blockly.getFocusManager().focusNode(icon);
+        // Icon bounds can't be calculated externally since they depend on
+        // protected properties, but the parent block is a reasonable proxy.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Fields scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        const field = block.getField('TEXT');
+        Blockly.getFocusManager().focusNode(field);
+        // Fields scroll their source block into view.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Connections scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getBlocksByType('controls_if')[0];
+        Blockly.getFocusManager().focusNode(block.nextConnection);
+        // Connection bounds can't be calculated externally since they depend on
+        // protected properties, but the parent block is a reasonable proxy.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+});

From 84933b9119b0d874d80a9e7f0fa0b34d6d10fa71 Mon Sep 17 00:00:00 2001
From: Maribeth Moffatt <maribethb@google.com>
Date: Tue, 19 Aug 2025 11:22:17 -0400
Subject: [PATCH 31/52] chore: lint error on only in mocha tests (#9300)

---
 eslint.config.mjs |  5 +++++
 package-lock.json | 26 ++++++++++++++++++++++++++
 package.json      |  1 +
 3 files changed, 32 insertions(+)

diff --git a/eslint.config.mjs b/eslint.config.mjs
index f018e525d87..0560586cbcc 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -1,6 +1,7 @@
 import eslint from '@eslint/js';
 import googleStyle from 'eslint-config-google';
 import jsdoc from 'eslint-plugin-jsdoc';
+import mochaPlugin from 'eslint-plugin-mocha';
 import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
 import globals from 'globals';
 import tseslint from 'typescript-eslint';
@@ -200,6 +201,9 @@ export default [
   },
   {
     files: ['tests/**'],
+    plugins: {
+      mocha: mochaPlugin,
+    },
     languageOptions: {
       globals: {
         'Blockly': true,
@@ -219,6 +223,7 @@ export default [
       'jsdoc/check-tag-names': ['warn', {'definedTags': ['record']}],
       'jsdoc/tag-lines': ['off'],
       'jsdoc/no-defaults': ['off'],
+      'mocha/no-exclusive-tests': 'error',
     },
   },
   {
diff --git a/package-lock.json b/package-lock.json
index c7f681f2e38..d30a69df659 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,6 +28,7 @@
         "eslint-config-google": "^0.14.0",
         "eslint-config-prettier": "^10.1.1",
         "eslint-plugin-jsdoc": "^52.0.2",
+        "eslint-plugin-mocha": "^11.1.0",
         "eslint-plugin-prettier": "^5.2.1",
         "glob": "^11.0.1",
         "globals": "^16.0.0",
@@ -4137,6 +4138,31 @@
         "spdx-license-ids": "^3.0.0"
       }
     },
+    "node_modules/eslint-plugin-mocha": {
+      "version": "11.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-mocha/-/eslint-plugin-mocha-11.1.0.tgz",
+      "integrity": "sha512-rKntVWRsQFPbf8OkSgVNRVRrcVAPaGTyEgWCEyXaPDJkTl0v5/lwu1vTk5sWiUJU8l2sxwvGUZzSNrEKdVMeQw==",
+      "dev": true,
+      "dependencies": {
+        "@eslint-community/eslint-utils": "^4.4.1",
+        "globals": "^15.14.0"
+      },
+      "peerDependencies": {
+        "eslint": ">=9.0.0"
+      }
+    },
+    "node_modules/eslint-plugin-mocha/node_modules/globals": {
+      "version": "15.15.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-15.15.0.tgz",
+      "integrity": "sha512-7ACyT3wmyp3I61S4fG682L0VA2RGD9otkqGJIwNUMF1SWUombIIk+af1unuDYgMm082aHYwD+mzJvv9Iu8dsgg==",
+      "dev": true,
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/eslint-plugin-prettier": {
       "version": "5.5.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.1.tgz",
diff --git a/package.json b/package.json
index c122a32fe1f..6cfd025c714 100644
--- a/package.json
+++ b/package.json
@@ -115,6 +115,7 @@
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^10.1.1",
     "eslint-plugin-jsdoc": "^52.0.2",
+    "eslint-plugin-mocha": "^11.1.0",
     "eslint-plugin-prettier": "^5.2.1",
     "glob": "^11.0.1",
     "globals": "^16.0.0",

From 29d5b43cd3ba1d210472c064c16e9a1c9dd7cddb Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Tue, 19 Aug 2025 08:28:11 -0700
Subject: [PATCH 32/52] chore(deps): bump actions/checkout from 4 to 5 (#9320)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 .github/workflows/appengine_deploy.yml     | 2 +-
 .github/workflows/browser_test.yml         | 2 +-
 .github/workflows/build.yml                | 6 +++---
 .github/workflows/keyboard_plugin_test.yml | 4 ++--
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/appengine_deploy.yml b/.github/workflows/appengine_deploy.yml
index 50afec2407c..efc6fe9417d 100644
--- a/.github/workflows/appengine_deploy.yml
+++ b/.github/workflows/appengine_deploy.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE.
       # When running manually this checks out the master branch.
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Prepare demo files
         # Install all dependencies, then copy all the files needed for demos.
diff --git a/.github/workflows/browser_test.yml b/.github/workflows/browser_test.yml
index 51ac0dffada..c2ce9913635 100644
--- a/.github/workflows/browser_test.yml
+++ b/.github/workflows/browser_test.yml
@@ -26,7 +26,7 @@ jobs:
         # https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c4ab688f8fd..d7a4e786ce6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,7 @@ jobs:
         # https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
 
@@ -54,7 +54,7 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Use Node.js 20.x
         uses: actions/setup-node@v4
@@ -71,7 +71,7 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Use Node.js 20.x
         uses: actions/setup-node@v4
diff --git a/.github/workflows/keyboard_plugin_test.yml b/.github/workflows/keyboard_plugin_test.yml
index 753d31dda1e..3d7d3d5d444 100644
--- a/.github/workflows/keyboard_plugin_test.yml
+++ b/.github/workflows/keyboard_plugin_test.yml
@@ -25,12 +25,12 @@ jobs:
 
     steps:
       - name: Checkout core Blockly
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: core-blockly
 
       - name: Checkout keyboard navigation plugin
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: 'google/blockly-keyboard-experimentation'
           ref: 'main'

From 10b1d1e848239ee6eff6fb6a1dd3e2cf2ead590f Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 19 Aug 2025 08:32:31 -0700
Subject: [PATCH 33/52] fix: Fix positioning of pasted blocks and comments in
 RTL. (#9302)

* fix: Fix positioning of pasted blocks in RTL.

* fix: Clean up after temporarily making the workspace RTL.

* fix: Remove .only.

* fix: Fix positioning of pasted comments in RTL.

* fix: Fix positioning of text preview on collapsed comments in RTL.
---
 core/clipboard/block_paster.ts |  3 ++
 core/comments/comment_view.ts  |  5 +++-
 core/xml.ts                    |  2 +-
 tests/mocha/clipboard_test.js  | 51 ++++++++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/core/clipboard/block_paster.ts b/core/clipboard/block_paster.ts
index 750cedca124..e782cc0b004 100644
--- a/core/clipboard/block_paster.ts
+++ b/core/clipboard/block_paster.ts
@@ -83,6 +83,9 @@ export function moveBlockToNotConflict(
   block: BlockSvg,
   originalPosition: Coordinate,
 ) {
+  if (block.workspace.RTL) {
+    originalPosition.x = block.workspace.getWidth() - originalPosition.x;
+  }
   const workspace = block.workspace;
   const snapRadius = config.snapRadius;
   const bumpOffset = Coordinate.difference(
diff --git a/core/comments/comment_view.ts b/core/comments/comment_view.ts
index ca0c261c390..b1cd628f8dd 100644
--- a/core/comments/comment_view.ts
+++ b/core/comments/comment_view.ts
@@ -368,7 +368,10 @@ export class CommentView implements IRenderedElement {
 
     const textPreviewWidth =
       size.width - foldoutSize.getWidth() - deleteSize.getWidth();
-    this.textPreview.setAttribute('x', `${foldoutSize.getWidth()}`);
+    this.textPreview.setAttribute(
+      'x',
+      `${(this.workspace.RTL ? -1 : 1) * foldoutSize.getWidth()}`,
+    );
     this.textPreview.setAttribute(
       'y',
       `${textPreviewMargin + textPreviewSize.height / 2}`,
diff --git a/core/xml.ts b/core/xml.ts
index cc26d8c8a2c..362a59ab287 100644
--- a/core/xml.ts
+++ b/core/xml.ts
@@ -68,7 +68,7 @@ export function saveWorkspaceComment(
   if (!skipId) elem.setAttribute('id', comment.id);
 
   const workspace = comment.workspace;
-  const loc = comment.getRelativeToSurfaceXY();
+  const loc = comment.getRelativeToSurfaceXY().clone();
   loc.x = workspace.RTL ? workspace.getWidth() - loc.x : loc.x;
   elem.setAttribute('x', `${loc.x}`);
   elem.setAttribute('y', `${loc.y}`);
diff --git a/tests/mocha/clipboard_test.js b/tests/mocha/clipboard_test.js
index d58f78b9b50..5a513b44a9e 100644
--- a/tests/mocha/clipboard_test.js
+++ b/tests/mocha/clipboard_test.js
@@ -157,6 +157,34 @@ suite('Clipboard', function () {
         );
       });
 
+      test('pasted blocks are bumped to not overlap in RTL', function () {
+        this.workspace.dispose();
+        this.workspace = Blockly.inject('blocklyDiv', {rtl: true});
+        const block = Blockly.serialization.blocks.append(
+          {
+            'type': 'controls_if',
+            'x': 38,
+            'y': 13,
+          },
+          this.workspace,
+        );
+        const data = block.toCopyData();
+
+        const newBlock = Blockly.clipboard.paste(data, this.workspace);
+        const oldBlockXY = block.getRelativeToSurfaceXY();
+        assert.deepEqual(
+          newBlock.getRelativeToSurfaceXY(),
+          new Blockly.utils.Coordinate(
+            oldBlockXY.x - Blockly.config.snapRadius,
+            oldBlockXY.y + Blockly.config.snapRadius * 2,
+          ),
+        );
+
+        // Restore an LTR workspace.
+        this.workspace.dispose();
+        this.workspace = Blockly.inject('blocklyDiv');
+      });
+
       test('pasted blocks are bumped to be outside the connection snap radius', function () {
         Blockly.serialization.workspaces.load(
           {
@@ -208,5 +236,28 @@ suite('Clipboard', function () {
         new Blockly.utils.Coordinate(40, 40),
       );
     });
+
+    test('pasted comments are bumped to not overlap in RTL', function () {
+      this.workspace.dispose();
+      this.workspace = Blockly.inject('blocklyDiv', {rtl: true});
+      Blockly.Xml.domToWorkspace(
+        Blockly.utils.xml.textToDom(
+          '<xml><comment id="test" x=10 y=10/></xml>',
+        ),
+        this.workspace,
+      );
+      const comment = this.workspace.getTopComments(false)[0];
+      const data = comment.toCopyData();
+
+      const newComment = Blockly.clipboard.paste(data, this.workspace);
+      const oldCommentXY = comment.getRelativeToSurfaceXY();
+      assert.deepEqual(
+        newComment.getRelativeToSurfaceXY(),
+        new Blockly.utils.Coordinate(oldCommentXY.x - 30, oldCommentXY.y + 30),
+      );
+      // Restore an LTR workspace.
+      this.workspace.dispose();
+      this.workspace = Blockly.inject('blocklyDiv');
+    });
   });
 });

From 9e1db9e332b6b2c609c22fff27cede7bb8b3acc7 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 19 Aug 2025 14:56:59 -0700
Subject: [PATCH 34/52] chore: Fix documentation generation warnings. (#9325)

* chore: Replace @yields with @returns.

* fix: Update the ESLint config to not require @yields.

* chore: Move docs onto getters.
---
 core/block.ts       | 2 +-
 core/field.ts       | 3 ---
 core/field_input.ts | 6 ++----
 eslint.config.mjs   | 3 ++-
 4 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/core/block.ts b/core/block.ts
index d15700a7e19..af44facda5d 100644
--- a/core/block.ts
+++ b/core/block.ts
@@ -1126,7 +1126,7 @@ export class Block {
   /**
    * Returns a generator that provides every field on the block.
    *
-   * @yields A generator that can be used to iterate the fields on the block.
+   * @returns A generator that can be used to iterate the fields on the block.
    */
   *getFields(): Generator<Field, undefined, void> {
     for (const input of this.inputList) {
diff --git a/core/field.ts b/core/field.ts
index fdcb2d693b9..3d12880a93a 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -119,9 +119,6 @@ export abstract class Field<T = any>
     return this.size;
   }
 
-  /**
-   * Sets the size of this field.
-   */
   protected set size_(newValue: Size) {
     this.size = newValue;
   }
diff --git a/core/field_input.ts b/core/field_input.ts
index b685309183a..97ad0e9594d 100644
--- a/core/field_input.ts
+++ b/core/field_input.ts
@@ -102,11 +102,9 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
    */
   override SERIALIZABLE = true;
 
-  /**
-   * Sets the size of this field. Although this appears to be a no-op, it must
-   * exist since the getter is overridden below.
-   */
   protected override set size_(newValue: Size) {
+    // Although this appears to be a no-op, it must exist since the getter is
+    // overridden below.
     super.size_ = newValue;
   }
 
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0560586cbcc..744e02b45bf 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -89,7 +89,8 @@ function buildTSOverride({files, tsconfig}) {
       '@typescript-eslint/no-explicit-any': ['off'],
       // We use this pattern extensively for block (e.g. controls_if) interfaces.
       '@typescript-eslint/no-empty-object-type': ['off'],
-
+      // TSDoc doesn't support @yields, so don't require that we use it.
+      'jsdoc/require-yields': ['off'],
       // params and returns docs are optional.
       'jsdoc/require-param-description': ['off'],
       'jsdoc/require-returns': ['off'],

From 4a0b710f7c2f7e5f9596e1476f0dc9ffe168344b Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 20 Aug 2025 11:26:45 -0700
Subject: [PATCH 35/52] fix: Show the delete cursor when dragging a block by an
 editable field. (#9326)

---
 core/css.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/css.ts b/core/css.ts
index 30ee47fc58a..503b6362ba2 100644
--- a/core/css.ts
+++ b/core/css.ts
@@ -181,7 +181,8 @@ let content = `
   cursor: -webkit-grabbing;
 }
 
-.blocklyDragging.blocklyDraggingDelete {
+.blocklyDragging.blocklyDraggingDelete,
+.blocklyDragging.blocklyDraggingDelete .blocklyField {
   cursor: url("<<<PATH>>>/handdelete.cur"), auto;
 }
 

From cf93f0721b244e206c3b5287a65dae4cc0fd1eda Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 21 Aug 2025 11:05:43 -0700
Subject: [PATCH 36/52] fix: Correct the alignment of narrow text in input
 fields. (#9327)

* fix: Correct the alignment of narrow text in input fields.

* chore: Clarify purpose of first argument to positionTextElement_().
---
 core/field.ts          |  3 +--
 core/field_dropdown.ts |  7 +++----
 core/field_input.ts    | 26 ++++++++++++++++++++++++--
 3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/core/field.ts b/core/field.ts
index 3d12880a93a..d993e197d23 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -849,8 +849,7 @@ export abstract class Field<T = any>
       totalHeight = Math.max(totalHeight, constants!.FIELD_BORDER_RECT_HEIGHT);
     }
 
-    this.size_.height = totalHeight;
-    this.size_.width = totalWidth;
+    this.size_ = new Size(totalWidth, totalHeight);
 
     this.positionTextElement_(xOffset, contentWidth);
     this.positionBorderRect_();
diff --git a/core/field_dropdown.ts b/core/field_dropdown.ts
index 8b01ccddab1..3be5c94c3e3 100644
--- a/core/field_dropdown.ts
+++ b/core/field_dropdown.ts
@@ -29,6 +29,7 @@ import * as aria from './utils/aria.js';
 import {Coordinate} from './utils/coordinate.js';
 import * as dom from './utils/dom.js';
 import * as parsing from './utils/parsing.js';
+import {Size} from './utils/size.js';
 import * as utilsString from './utils/string.js';
 import {Svg} from './utils/svg.js';
 
@@ -553,8 +554,7 @@ export class FieldDropdown extends Field<string> {
     } else {
       arrowWidth = dom.getTextWidth(this.arrow as SVGTSpanElement);
     }
-    this.size_.width = imageWidth + arrowWidth + xPadding * 2;
-    this.size_.height = height;
+    this.size_ = new Size(imageWidth + arrowWidth + xPadding * 2, height);
 
     let arrowX = 0;
     if (block.RTL) {
@@ -595,8 +595,7 @@ export class FieldDropdown extends Field<string> {
         height / 2 - this.getConstants()!.FIELD_DROPDOWN_SVG_ARROW_SIZE / 2,
       );
     }
-    this.size_.width = textWidth + arrowWidth + xPadding * 2;
-    this.size_.height = height;
+    this.size_ = new Size(textWidth + arrowWidth + xPadding * 2, height);
 
     this.positionTextElement_(xPadding, textWidth);
   }
diff --git a/core/field_input.ts b/core/field_input.ts
index 97ad0e9594d..55383a4c1d2 100644
--- a/core/field_input.ts
+++ b/core/field_input.ts
@@ -45,6 +45,11 @@ import type {WorkspaceSvg} from './workspace_svg.js';
  */
 type InputTypes = string | number;
 
+/**
+ * The minimum width of an input field.
+ */
+const MINIMUM_WIDTH = 14;
+
 /**
  * Abstract class for an editable input field.
  *
@@ -113,8 +118,8 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
    */
   protected override get size_() {
     const s = super.size_;
-    if (s.width < 14) {
-      s.width = 14;
+    if (s.width < MINIMUM_WIDTH) {
+      s.width = MINIMUM_WIDTH;
     }
 
     return s;
@@ -730,6 +735,23 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
     return true;
   }
 
+  /**
+   * Position a field's text element after a size change.  This handles both LTR
+   * and RTL positioning.
+   *
+   * @param xMargin x offset to use when positioning the text element.
+   * @param contentWidth The content width.
+   */
+  protected override positionTextElement_(
+    xMargin: number,
+    contentWidth: number,
+  ) {
+    const effectiveWidth = xMargin * 2 + contentWidth;
+    const delta =
+      effectiveWidth < MINIMUM_WIDTH ? (MINIMUM_WIDTH - effectiveWidth) / 2 : 0;
+    super.positionTextElement_(xMargin + delta, contentWidth);
+  }
+
   /**
    * Use the `getText_` developer hook to override the field's text
    * representation. When we're currently editing, return the current HTML value

From 4891659d6e6ff8c82ec09dfc36ecf0d5b5cfe7be Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 21 Aug 2025 11:15:07 -0700
Subject: [PATCH 37/52] fix: Fix bug that caused inadvertent scrolling when the
 `WidgetDiv` was shown. (#9291)

* fix: Fix bug that caused inadvertent scrolling when the `WidgetDiv` was shown.

* chore: Add test to verify that displaying the context menu does not scroll the page.

* chore: Clarify comments.

* fix: Remove errant `.only`.

* chore: Add test to verify that actively focusing a node does not scroll the page.

* fix: Remove inadvertent `.only`.
---
 core/focus_manager.ts                        |  8 +++-
 core/interfaces/i_focusable_node.ts          |  3 ++
 tests/browser/test/basic_playground_test.mjs | 39 ++++++++++++++++++++
 3 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/core/focus_manager.ts b/core/focus_manager.ts
index 02e0591070f..47e4324540d 100644
--- a/core/focus_manager.ts
+++ b/core/focus_manager.ts
@@ -309,6 +309,8 @@ export class FocusManager {
    * Note that this may update the specified node's element's tabindex to ensure
    * that it can be properly read out by screenreaders while focused.
    *
+   * The focused node will not be automatically scrolled into view.
+   *
    * @param focusableNode The node that should receive active focus.
    */
   focusNode(focusableNode: IFocusableNode): void {
@@ -423,6 +425,8 @@ export class FocusManager {
    * the returned lambda is called. Additionally, only 1 ephemeral focus context
    * can be active at any given time (attempting to activate more than one
    * simultaneously will result in an error being thrown).
+   *
+   * This method does not scroll the ephemerally focused element into view.
    */
   takeEphemeralFocus(
     focusableElement: HTMLElement | SVGElement,
@@ -439,7 +443,7 @@ export class FocusManager {
     if (this.focusedNode) {
       this.passivelyFocusNode(this.focusedNode, null);
     }
-    focusableElement.focus();
+    focusableElement.focus({preventScroll: true});
 
     let hasFinishedEphemeralFocus = false;
     return () => {
@@ -574,7 +578,7 @@ export class FocusManager {
     }
 
     this.setNodeToVisualActiveFocus(node);
-    elem.focus();
+    elem.focus({preventScroll: true});
   }
 
   /**
diff --git a/core/interfaces/i_focusable_node.ts b/core/interfaces/i_focusable_node.ts
index 24833328d7f..57ec1a126e1 100644
--- a/core/interfaces/i_focusable_node.ts
+++ b/core/interfaces/i_focusable_node.ts
@@ -59,6 +59,9 @@ export interface IFocusableNode {
    * they should avoid the following:
    * - Creating or removing DOM elements (including via the renderer or drawer).
    * - Affecting focus via DOM focus() calls or the FocusManager.
+   *
+   * Implementations may consider scrolling themselves into view here; that is
+   * not handled by the focus manager.
    */
   onNodeFocus(): void;
 
diff --git a/tests/browser/test/basic_playground_test.mjs b/tests/browser/test/basic_playground_test.mjs
index 4c54523bd7f..c7c8a5a370c 100644
--- a/tests/browser/test/basic_playground_test.mjs
+++ b/tests/browser/test/basic_playground_test.mjs
@@ -101,6 +101,45 @@ suite('Right Clicking on Blocks', function () {
     await contextMenuSelect(this.browser, this.block, 'Remove Comment');
     chai.assert.isNull(await getCommentText(this.browser, this.block.id));
   });
+
+  test('does not scroll the page when node is ephemerally focused', async function () {
+    const initialScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+    // This left-right-left sequence was necessary to reproduce unintended
+    // scrolling; regardless of the number of clicks/context menu activations,
+    // the page should not scroll.
+    this.block.click({button: 2});
+    this.block.click({button: 0});
+    this.block.click({button: 2});
+    await this.browser.pause(250);
+    const finalScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+
+    chai.assert.equal(initialScroll, finalScroll);
+  });
+
+  test('does not scroll the page when node is actively focused', async function () {
+    await this.browser.setWindowSize(500, 300);
+    await this.browser.setViewport({width: 500, height: 300});
+    const initialScroll = await this.browser.execute((blockId) => {
+      window.scrollTo(0, document.body.scrollHeight);
+      return window.scrollY;
+    }, this.block.id);
+    await this.browser.execute(() => {
+      Blockly.getFocusManager().focusNode(
+        Blockly.getMainWorkspace().getToolbox(),
+      );
+    });
+    const finalScroll = await this.browser.execute(() => {
+      return window.scrollY;
+    });
+
+    chai.assert.equal(initialScroll, finalScroll);
+    await this.browser.setWindowSize(800, 600);
+    await this.browser.setViewport({width: 800, height: 600});
+  });
 });
 
 suite('Disabling', function () {

From c32f6db02287e0140350f7693fc15888ffae656e Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Thu, 21 Aug 2025 12:06:10 -0700
Subject: [PATCH 38/52] chore(deps): bump eslint-plugin-prettier from 5.5.1 to
 5.5.4 (#9319)

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 5.5.1 to 5.5.4.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/eslint-plugin-prettier/compare/v5.5.1...v5.5.4)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-version: 5.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index d30a69df659..285fbba583b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4164,10 +4164,11 @@
       }
     },
     "node_modules/eslint-plugin-prettier": {
-      "version": "5.5.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.1.tgz",
-      "integrity": "sha512-dobTkHT6XaEVOo8IO90Q4DOSxnm3Y151QxPJlM/vKC0bVy+d6cVWQZLlFiuZPP0wS6vZwSKeJgKkcS+KfMBlRw==",
+      "version": "5.5.4",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.4.tgz",
+      "integrity": "sha512-swNtI95SToIz05YINMA6Ox5R057IMAmWZ26GqPxusAp1TZzj+IdY9tXNWWD3vkF/wEqydCONcwjTFpxybBqZsg==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "prettier-linter-helpers": "^1.0.0",
         "synckit": "^0.11.7"

From be5f5a2a0a3d8271c15eaf6ece4c73023a184d88 Mon Sep 17 00:00:00 2001
From: Ennis Nian <nxy1027@163.com>
Date: Fri, 22 Aug 2025 04:59:09 +0800
Subject: [PATCH 39/52] fix: pointercancel event is not handled (#9250)

---
 core/touch.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/touch.ts b/core/touch.ts
index 8fb2cd2298c..9af3b1f9494 100644
--- a/core/touch.ts
+++ b/core/touch.ts
@@ -46,6 +46,7 @@ export const TOUCH_MAP: {[key: string]: string[]} = {
   'mouseup': ['pointerup', 'pointercancel'],
   'touchend': ['pointerup'],
   'touchcancel': ['pointercancel'],
+  'pointerup': ['pointerup', 'pointercancel'],
 };
 
 /** PID of queued long-press task. */

From e358f4e7eeeffe93b995d6d5df0d83523a5a388d Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Fri, 22 Aug 2025 20:01:03 +0100
Subject: [PATCH 40/52] chore(deps): bump eslint-config-prettier from 10.1.5 to
 10.1.8 (#9321)

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 10.1.5 to 10.1.8.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/eslint-config-prettier/compare/v10.1.5...v10.1.8)

---
updated-dependencies:
- dependency-name: eslint-config-prettier
  dependency-version: 10.1.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 285fbba583b..0f8f34104fc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4076,10 +4076,11 @@
       }
     },
     "node_modules/eslint-config-prettier": {
-      "version": "10.1.5",
-      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.5.tgz",
-      "integrity": "sha512-zc1UmCpNltmVY34vuLRV61r1K27sWuX39E+uyUnY8xS2Bex88VV9cugG+UZbRSRGtGyFboj+D8JODyme1plMpw==",
+      "version": "10.1.8",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.8.tgz",
+      "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
       "dev": true,
+      "license": "MIT",
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },

From cb698928251738e2c912b197479813c535c2f57f Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Fri, 22 Aug 2025 14:55:07 -0700
Subject: [PATCH 41/52] fix: Allow reregistering fields. (#9290)

---
 core/field_registry.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/field_registry.ts b/core/field_registry.ts
index 06bb9acd045..e02ece75c96 100644
--- a/core/field_registry.ts
+++ b/core/field_registry.ts
@@ -56,11 +56,11 @@ export interface RegistrableField {
  * @param type The field type name as used in the JSON definition.
  * @param fieldClass The field class containing a fromJson function that can
  *     construct an instance of the field.
- * @throws {Error} if the type name is empty, the field is already registered,
- *     or the fieldClass is not an object containing a fromJson function.
+ * @throws {Error} if the type name is empty or the fieldClass is not an object
+ *     containing a fromJson function.
  */
 export function register(type: string, fieldClass: RegistrableField) {
-  registry.register(registry.Type.FIELD, type, fieldClass);
+  registry.register(registry.Type.FIELD, type, fieldClass, true);
 }
 
 /**

From aeb3e5e1435e0fc5769cea62170de35c2b8e84a6 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Tue, 26 Aug 2025 09:08:01 -0700
Subject: [PATCH 42/52] chore(deps): bump chai from 5.2.1 to 6.0.1 (#9330)

* chore(deps): bump chai from 5.2.1 to 6.0.1

Bumps [chai](https://github.com/chaijs/chai) from 5.2.1 to 6.0.1.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](https://github.com/chaijs/chai/compare/v5.2.1...v6.0.1)

---
updated-dependencies:
- dependency-name: chai
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix: Fix Chai import path.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Aaron Dodson <adodson@google.com>
---
 package-lock.json                             | 60 ++-----------------
 package.json                                  |  2 +-
 tests/mocha/block_json_test.js                |  2 +-
 tests/mocha/block_test.js                     |  2 +-
 tests/mocha/blocks/lists_test.js              |  2 +-
 tests/mocha/blocks/logic_ternary_test.js      |  2 +-
 tests/mocha/blocks/loops_test.js              |  2 +-
 tests/mocha/blocks/procedures_test.js         |  2 +-
 tests/mocha/blocks/variables_test.js          |  2 +-
 tests/mocha/clipboard_test.js                 |  2 +-
 tests/mocha/comment_deserialization_test.js   |  2 +-
 tests/mocha/comment_test.js                   |  2 +-
 tests/mocha/comment_view_test.js              |  2 +-
 tests/mocha/connection_checker_test.js        |  2 +-
 tests/mocha/connection_db_test.js             |  2 +-
 tests/mocha/connection_test.js                |  2 +-
 tests/mocha/contextmenu_items_test.js         |  2 +-
 tests/mocha/contextmenu_test.js               |  2 +-
 tests/mocha/cursor_test.js                    |  2 +-
 tests/mocha/dialog_test.js                    |  2 +-
 tests/mocha/dropdowndiv_test.js               |  2 +-
 tests/mocha/event_block_change_test.js        |  2 +-
 tests/mocha/event_block_create_test.js        |  2 +-
 tests/mocha/event_block_delete_test.js        |  2 +-
 tests/mocha/event_block_drag_test.js          |  2 +-
 ...nt_block_field_intermediate_change_test.js |  2 +-
 tests/mocha/event_block_move_test.js          |  2 +-
 tests/mocha/event_bubble_open_test.js         |  2 +-
 tests/mocha/event_click_test.js               |  2 +-
 tests/mocha/event_comment_change_test.js      |  2 +-
 tests/mocha/event_comment_collapse_test.js    |  2 +-
 tests/mocha/event_comment_create_test.js      |  2 +-
 tests/mocha/event_comment_delete_test.js      |  2 +-
 tests/mocha/event_comment_drag_test.js        |  2 +-
 tests/mocha/event_comment_move_test.js        |  2 +-
 tests/mocha/event_comment_resize_test.js      |  2 +-
 tests/mocha/event_selected_test.js            |  2 +-
 tests/mocha/event_test.js                     |  2 +-
 tests/mocha/event_theme_change_test.js        |  2 +-
 tests/mocha/event_toolbox_item_select_test.js |  2 +-
 tests/mocha/event_trashcan_open_test.js       |  2 +-
 tests/mocha/event_var_create_test.js          |  2 +-
 tests/mocha/event_var_delete_test.js          |  2 +-
 tests/mocha/event_var_rename_test.js          |  2 +-
 tests/mocha/event_var_type_change_test.js     |  2 +-
 tests/mocha/event_viewport_test.js            |  2 +-
 tests/mocha/extensions_test.js                |  2 +-
 tests/mocha/field_checkbox_test.js            |  2 +-
 tests/mocha/field_colour_test.js              |  2 +-
 tests/mocha/field_dropdown_test.js            |  2 +-
 tests/mocha/field_image_test.js               |  2 +-
 tests/mocha/field_label_serializable_test.js  |  2 +-
 tests/mocha/field_label_test.js               |  2 +-
 tests/mocha/field_number_test.js              |  2 +-
 tests/mocha/field_registry_test.js            |  2 +-
 tests/mocha/field_test.js                     |  2 +-
 tests/mocha/field_textinput_test.js           |  2 +-
 tests/mocha/field_variable_test.js            |  2 +-
 tests/mocha/flyout_test.js                    |  2 +-
 tests/mocha/focus_manager_test.js             |  2 +-
 tests/mocha/focusable_tree_traverser_test.js  |  2 +-
 tests/mocha/generator_test.js                 |  2 +-
 tests/mocha/gesture_test.js                   |  2 +-
 tests/mocha/icon_test.js                      |  2 +-
 tests/mocha/input_test.js                     |  2 +-
 tests/mocha/insertion_marker_test.js          |  2 +-
 tests/mocha/jso_deserialization_test.js       |  2 +-
 tests/mocha/jso_serialization_test.js         |  2 +-
 tests/mocha/json_test.js                      |  2 +-
 .../keyboard_navigation_controller_test.js    |  2 +-
 tests/mocha/layering_test.js                  |  2 +-
 tests/mocha/metrics_test.js                   |  2 +-
 tests/mocha/mutator_test.js                   |  2 +-
 tests/mocha/names_test.js                     |  2 +-
 tests/mocha/navigation_test.js                |  2 +-
 tests/mocha/old_workspace_comment_test.js     |  2 +-
 tests/mocha/procedure_map_test.js             |  2 +-
 tests/mocha/rect_test.js                      |  2 +-
 tests/mocha/registry_test.js                  |  2 +-
 tests/mocha/render_management_test.js         |  2 +-
 tests/mocha/serializer_test.js                |  2 +-
 tests/mocha/shortcut_items_test.js            |  2 +-
 tests/mocha/shortcut_registry_test.js         |  2 +-
 tests/mocha/test_helpers/code_generation.js   |  2 +-
 tests/mocha/test_helpers/events.js            |  2 +-
 tests/mocha/test_helpers/fields.js            |  2 +-
 tests/mocha/test_helpers/procedures.js        |  2 +-
 tests/mocha/test_helpers/serialization.js     |  2 +-
 tests/mocha/test_helpers/variables.js         |  2 +-
 tests/mocha/test_helpers/warnings.js          |  2 +-
 tests/mocha/test_helpers/workspace.js         |  2 +-
 tests/mocha/theme_test.js                     |  2 +-
 tests/mocha/toast_test.js                     |  2 +-
 tests/mocha/toolbox_test.js                   |  2 +-
 tests/mocha/tooltip_test.js                   |  2 +-
 tests/mocha/touch_test.js                     |  2 +-
 tests/mocha/trashcan_test.js                  |  2 +-
 tests/mocha/utils_test.js                     |  2 +-
 tests/mocha/variable_map_test.js              |  2 +-
 tests/mocha/variable_model_test.js            |  2 +-
 tests/mocha/widget_div_test.js                |  2 +-
 tests/mocha/workspace_comment_test.js         |  2 +-
 tests/mocha/workspace_svg_test.js             |  2 +-
 tests/mocha/xml_test.js                       |  2 +-
 tests/mocha/zoom_controls_test.js             |  2 +-
 105 files changed, 108 insertions(+), 160 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 0f8f34104fc..f7a8f9426b9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@microsoft/api-extractor": "^7.29.5",
         "ajv": "^8.17.1",
         "async-done": "^2.0.0",
-        "chai": "^5.1.1",
+        "chai": "^6.0.1",
         "concurrently": "^9.0.1",
         "eslint": "^9.15.0",
         "eslint-config-google": "^0.14.0",
@@ -2489,15 +2489,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/assertion-error": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
-      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
-      "dev": true,
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -2882,18 +2873,11 @@
       }
     },
     "node_modules/chai": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-5.2.1.tgz",
-      "integrity": "sha512-5nFxhUrX0PqtyogoYOA8IPswy5sZFTOsBFl/9bNsmDLgsxYTzSZQJDPppDnZPTQbzSEm0hqGjWPzRemQCYbD6A==",
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.0.1.tgz",
+      "integrity": "sha512-/JOoU2//6p5vCXh00FpNgtlw0LjvhGttaWc+y7wpW9yjBm3ys0dI8tSKZxIOgNruz5J0RleccatSIC3uxEZP0g==",
       "dev": true,
       "license": "MIT",
-      "dependencies": {
-        "assertion-error": "^2.0.1",
-        "check-error": "^2.1.1",
-        "deep-eql": "^5.0.1",
-        "loupe": "^3.1.0",
-        "pathval": "^2.0.0"
-      },
       "engines": {
         "node": ">=18"
       }
@@ -2914,15 +2898,6 @@
         "url": "https://github.com/chalk/chalk?sponsor=1"
       }
     },
-    "node_modules/check-error": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/check-error/-/check-error-2.1.1.tgz",
-      "integrity": "sha512-OAlb+T7V4Op9OwdkjmguYRqncdlx5JiofwOAUkmTF+jNdHwzTaTs4sRAGpzLF3oOz5xAyDGrPgeIDFQmDOTiJw==",
-      "dev": true,
-      "engines": {
-        "node": ">= 16"
-      }
-    },
     "node_modules/cheerio": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-1.0.0.tgz",
@@ -3586,15 +3561,6 @@
         "node": ">=0.10"
       }
     },
-    "node_modules/deep-eql": {
-      "version": "5.0.2",
-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-5.0.2.tgz",
-      "integrity": "sha512-h5k/5U50IJJFpzfL6nO9jaaumfjO/f2NjK/oYB2Djzm4p9L+3T9qWpZqZ2hAbLPuuYq9wrU08WQyBTL5GbPk5Q==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/deep-is": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
@@ -6794,15 +6760,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/loupe": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/loupe/-/loupe-3.1.1.tgz",
-      "integrity": "sha512-edNu/8D5MKVfGVFRhFf8aAxiTM6Wumfz5XsaatSxlD3w4R1d/WEKUTydCdPGbl9K7QG/Ca3GnDV2sIKIpXRQcw==",
-      "dev": true,
-      "dependencies": {
-        "get-func-name": "^2.0.1"
-      }
-    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -7731,15 +7688,6 @@
       "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
       "dev": true
     },
-    "node_modules/pathval": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-2.0.0.tgz",
-      "integrity": "sha512-vE7JKRyES09KiunauX7nd2Q9/L7lhok4smP9RZTDeD4MVs72Dp2qNFVz39Nz5a0FVEW0BJR6C0DYrq6unoziZA==",
-      "dev": true,
-      "engines": {
-        "node": ">= 14.16"
-      }
-    },
     "node_modules/pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
diff --git a/package.json b/package.json
index 6cfd025c714..c52a79003e9 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "@microsoft/api-extractor": "^7.29.5",
     "ajv": "^8.17.1",
     "async-done": "^2.0.0",
-    "chai": "^5.1.1",
+    "chai": "^6.0.1",
     "concurrently": "^9.0.1",
     "eslint": "^9.15.0",
     "eslint-config-google": "^0.14.0",
diff --git a/tests/mocha/block_json_test.js b/tests/mocha/block_json_test.js
index 4baccef6b7b..31abd6e3484 100644
--- a/tests/mocha/block_json_test.js
+++ b/tests/mocha/block_json_test.js
@@ -5,7 +5,7 @@
  */
 
 import {Align} from '../../build/src/core/inputs/align.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/block_test.js b/tests/mocha/block_test.js
index e3bd470902d..1f8f9b1ee41 100644
--- a/tests/mocha/block_test.js
+++ b/tests/mocha/block_test.js
@@ -11,7 +11,7 @@ import {IconType} from '../../build/src/core/icons/icon_types.js';
 import {EndRowInput} from '../../build/src/core/inputs/end_row_input.js';
 import {isCommentIcon} from '../../build/src/core/interfaces/i_comment_icon.js';
 import {Size} from '../../build/src/core/utils/size.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createRenderedBlock} from './test_helpers/block_definitions.js';
 import {
   createChangeListenerSpy,
diff --git a/tests/mocha/blocks/lists_test.js b/tests/mocha/blocks/lists_test.js
index 490109d22ca..e749fae90a7 100644
--- a/tests/mocha/blocks/lists_test.js
+++ b/tests/mocha/blocks/lists_test.js
@@ -5,7 +5,7 @@
  */
 
 import {ConnectionType} from '../../../build/src/core/connection_type.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {defineStatementBlock} from '../test_helpers/block_definitions.js';
 import {runSerializationTestSuite} from '../test_helpers/serialization.js';
 import {
diff --git a/tests/mocha/blocks/logic_ternary_test.js b/tests/mocha/blocks/logic_ternary_test.js
index 71920935981..3d343a7caec 100644
--- a/tests/mocha/blocks/logic_ternary_test.js
+++ b/tests/mocha/blocks/logic_ternary_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as eventUtils from '../../../build/src/core/events/utils.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runSerializationTestSuite} from '../test_helpers/serialization.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/blocks/loops_test.js b/tests/mocha/blocks/loops_test.js
index f8d74916c29..eb040c884a7 100644
--- a/tests/mocha/blocks/loops_test.js
+++ b/tests/mocha/blocks/loops_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../../build/src/core/blockly.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/blocks/procedures_test.js b/tests/mocha/blocks/procedures_test.js
index 4b20662cf93..5ac651fe4cd 100644
--- a/tests/mocha/blocks/procedures_test.js
+++ b/tests/mocha/blocks/procedures_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../../build/src/core/blockly.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {defineRowBlock} from '../test_helpers/block_definitions.js';
 import {
   assertCallBlockStructure,
diff --git a/tests/mocha/blocks/variables_test.js b/tests/mocha/blocks/variables_test.js
index d12691dd476..a317fe11b52 100644
--- a/tests/mocha/blocks/variables_test.js
+++ b/tests/mocha/blocks/variables_test.js
@@ -5,7 +5,7 @@
  */
 
 import {nameUsedWithConflictingParam} from '../../../build/src/core/variables.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {
   MockParameterModelWithVar,
   MockProcedureModel,
diff --git a/tests/mocha/clipboard_test.js b/tests/mocha/clipboard_test.js
index 5a513b44a9e..ff49c0e303c 100644
--- a/tests/mocha/clipboard_test.js
+++ b/tests/mocha/clipboard_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   createChangeListenerSpy,
diff --git a/tests/mocha/comment_deserialization_test.js b/tests/mocha/comment_deserialization_test.js
index 54ee0b2ff30..f834eb0f301 100644
--- a/tests/mocha/comment_deserialization_test.js
+++ b/tests/mocha/comment_deserialization_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/comment_test.js b/tests/mocha/comment_test.js
index 0ff1c239e30..1f52df8fd52 100644
--- a/tests/mocha/comment_test.js
+++ b/tests/mocha/comment_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/comment_view_test.js b/tests/mocha/comment_view_test.js
index 57a24742457..a60a7a973ff 100644
--- a/tests/mocha/comment_view_test.js
+++ b/tests/mocha/comment_view_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_checker_test.js b/tests/mocha/connection_checker_test.js
index fee2966d766..bdbcb70a6ec 100644
--- a/tests/mocha/connection_checker_test.js
+++ b/tests/mocha/connection_checker_test.js
@@ -5,7 +5,7 @@
  */
 
 import {ConnectionType} from '../../build/src/core/connection_type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_db_test.js b/tests/mocha/connection_db_test.js
index 04f685124ca..459c59e3ab4 100644
--- a/tests/mocha/connection_db_test.js
+++ b/tests/mocha/connection_db_test.js
@@ -6,7 +6,7 @@
 
 import {ConnectionType} from '../../build/src/core/connection_type.js';
 import * as idGenerator from '../../build/src/core/utils/idgenerator.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/connection_test.js b/tests/mocha/connection_test.js
index cefea1784e7..b36f358eac3 100644
--- a/tests/mocha/connection_test.js
+++ b/tests/mocha/connection_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineRowBlock,
   defineStackBlock,
diff --git a/tests/mocha/contextmenu_items_test.js b/tests/mocha/contextmenu_items_test.js
index d9044ec7e28..08ab5d5267b 100644
--- a/tests/mocha/contextmenu_items_test.js
+++ b/tests/mocha/contextmenu_items_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/contextmenu_test.js b/tests/mocha/contextmenu_test.js
index 65896112bb1..df5bf79dc35 100644
--- a/tests/mocha/contextmenu_test.js
+++ b/tests/mocha/contextmenu_test.js
@@ -6,7 +6,7 @@
 
 import {callbackFactory} from '../../build/src/core/contextmenu.js';
 import * as xmlUtils from '../../build/src/core/utils/xml.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/cursor_test.js b/tests/mocha/cursor_test.js
index 6f841ae09c6..02426ae26b8 100644
--- a/tests/mocha/cursor_test.js
+++ b/tests/mocha/cursor_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createRenderedBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/dialog_test.js b/tests/mocha/dialog_test.js
index f250ff0f8aa..7d4147d83f8 100644
--- a/tests/mocha/dialog_test.js
+++ b/tests/mocha/dialog_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/dropdowndiv_test.js b/tests/mocha/dropdowndiv_test.js
index fc792fbaf24..495237f18bc 100644
--- a/tests/mocha/dropdowndiv_test.js
+++ b/tests/mocha/dropdowndiv_test.js
@@ -6,7 +6,7 @@
 
 import {Rect} from '../../build/src/core/utils/rect.js';
 import * as style from '../../build/src/core/utils/style.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_block_change_test.js b/tests/mocha/event_block_change_test.js
index 7de0a23b607..9e1f9c3103e 100644
--- a/tests/mocha/event_block_change_test.js
+++ b/tests/mocha/event_block_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineMutatorBlocks} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_create_test.js b/tests/mocha/event_block_create_test.js
index f59f9435efd..1672b56bb98 100644
--- a/tests/mocha/event_block_create_test.js
+++ b/tests/mocha/event_block_create_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
diff --git a/tests/mocha/event_block_delete_test.js b/tests/mocha/event_block_delete_test.js
index d74b6aa062b..e2fb5b8ce88 100644
--- a/tests/mocha/event_block_delete_test.js
+++ b/tests/mocha/event_block_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_drag_test.js b/tests/mocha/event_block_drag_test.js
index 9b0f2031ad0..cc71e3bf084 100644
--- a/tests/mocha/event_block_drag_test.js
+++ b/tests/mocha/event_block_drag_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_block_field_intermediate_change_test.js b/tests/mocha/event_block_field_intermediate_change_test.js
index 0ff4e1bbf3c..d917dadcdd5 100644
--- a/tests/mocha/event_block_field_intermediate_change_test.js
+++ b/tests/mocha/event_block_field_intermediate_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_block_move_test.js b/tests/mocha/event_block_move_test.js
index b93457e14c1..6d1890eebeb 100644
--- a/tests/mocha/event_block_move_test.js
+++ b/tests/mocha/event_block_move_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_bubble_open_test.js b/tests/mocha/event_bubble_open_test.js
index 099a625f6e2..a445a6a7819 100644
--- a/tests/mocha/event_bubble_open_test.js
+++ b/tests/mocha/event_bubble_open_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineMutatorBlocks} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_click_test.js b/tests/mocha/event_click_test.js
index 6e18769485b..5c4afbcadf9 100644
--- a/tests/mocha/event_click_test.js
+++ b/tests/mocha/event_click_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_comment_change_test.js b/tests/mocha/event_comment_change_test.js
index ed5f4d9f6ae..edb539ef555 100644
--- a/tests/mocha/event_comment_change_test.js
+++ b/tests/mocha/event_comment_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_collapse_test.js b/tests/mocha/event_comment_collapse_test.js
index e2d27530708..5c3f61054a1 100644
--- a/tests/mocha/event_comment_collapse_test.js
+++ b/tests/mocha/event_comment_collapse_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_create_test.js b/tests/mocha/event_comment_create_test.js
index df919541d95..71ef8ed1b75 100644
--- a/tests/mocha/event_comment_create_test.js
+++ b/tests/mocha/event_comment_create_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_delete_test.js b/tests/mocha/event_comment_delete_test.js
index 2e2bb45c491..dd9f0dd2286 100644
--- a/tests/mocha/event_comment_delete_test.js
+++ b/tests/mocha/event_comment_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_drag_test.js b/tests/mocha/event_comment_drag_test.js
index d214e0adba1..f6685cc5bdf 100644
--- a/tests/mocha/event_comment_drag_test.js
+++ b/tests/mocha/event_comment_drag_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_move_test.js b/tests/mocha/event_comment_move_test.js
index aae3fdfe632..b3acea990a6 100644
--- a/tests/mocha/event_comment_move_test.js
+++ b/tests/mocha/event_comment_move_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_comment_resize_test.js b/tests/mocha/event_comment_resize_test.js
index b74e1abb2bf..bed3e733a65 100644
--- a/tests/mocha/event_comment_resize_test.js
+++ b/tests/mocha/event_comment_resize_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_selected_test.js b/tests/mocha/event_selected_test.js
index 1ce8306db48..8731099ec96 100644
--- a/tests/mocha/event_selected_test.js
+++ b/tests/mocha/event_selected_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/event_test.js b/tests/mocha/event_test.js
index 7423f22f74b..a5019c8a978 100644
--- a/tests/mocha/event_test.js
+++ b/tests/mocha/event_test.js
@@ -6,7 +6,7 @@
 
 import * as Blockly from '../../build/src/core/blockly.js';
 import * as eventUtils from '../../build/src/core/events/utils.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventEquals,
   assertNthCallEventArgEquals,
diff --git a/tests/mocha/event_theme_change_test.js b/tests/mocha/event_theme_change_test.js
index f20f745b6a0..396347c9e13 100644
--- a/tests/mocha/event_theme_change_test.js
+++ b/tests/mocha/event_theme_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_toolbox_item_select_test.js b/tests/mocha/event_toolbox_item_select_test.js
index bf6a9a46212..02484c35bc1 100644
--- a/tests/mocha/event_toolbox_item_select_test.js
+++ b/tests/mocha/event_toolbox_item_select_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_trashcan_open_test.js b/tests/mocha/event_trashcan_open_test.js
index 2c809f2dfad..47da09a075a 100644
--- a/tests/mocha/event_trashcan_open_test.js
+++ b/tests/mocha/event_trashcan_open_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_create_test.js b/tests/mocha/event_var_create_test.js
index e374c496541..79af41281de 100644
--- a/tests/mocha/event_var_create_test.js
+++ b/tests/mocha/event_var_create_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_delete_test.js b/tests/mocha/event_var_delete_test.js
index b06943d9a19..93d9ef0ba2d 100644
--- a/tests/mocha/event_var_delete_test.js
+++ b/tests/mocha/event_var_delete_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_rename_test.js b/tests/mocha/event_var_rename_test.js
index 7fbd185ab7b..b6d77cb35bd 100644
--- a/tests/mocha/event_var_rename_test.js
+++ b/tests/mocha/event_var_rename_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_var_type_change_test.js b/tests/mocha/event_var_type_change_test.js
index d19b0421a33..066c145a3ef 100644
--- a/tests/mocha/event_var_type_change_test.js
+++ b/tests/mocha/event_var_type_change_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/event_viewport_test.js b/tests/mocha/event_viewport_test.js
index edacc0da6cb..cd11079fa32 100644
--- a/tests/mocha/event_viewport_test.js
+++ b/tests/mocha/event_viewport_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/extensions_test.js b/tests/mocha/extensions_test.js
index 66772cbea4b..8c41861d5d8 100644
--- a/tests/mocha/extensions_test.js
+++ b/tests/mocha/extensions_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/field_checkbox_test.js b/tests/mocha/field_checkbox_test.js
index 08190fed823..74357338a5a 100644
--- a/tests/mocha/field_checkbox_test.js
+++ b/tests/mocha/field_checkbox_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {
   assertFieldValue,
diff --git a/tests/mocha/field_colour_test.js b/tests/mocha/field_colour_test.js
index 262f978f29d..975d5a01d4a 100644
--- a/tests/mocha/field_colour_test.js
+++ b/tests/mocha/field_colour_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_dropdown_test.js b/tests/mocha/field_dropdown_test.js
index e9bc159146d..a1731e81281 100644
--- a/tests/mocha/field_dropdown_test.js
+++ b/tests/mocha/field_dropdown_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_image_test.js b/tests/mocha/field_image_test.js
index a02b3f6b64a..f0358703bdf 100644
--- a/tests/mocha/field_image_test.js
+++ b/tests/mocha/field_image_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertFieldValue,
   runConstructorSuiteTests,
diff --git a/tests/mocha/field_label_serializable_test.js b/tests/mocha/field_label_serializable_test.js
index a831713412c..443cc6d1753 100644
--- a/tests/mocha/field_label_serializable_test.js
+++ b/tests/mocha/field_label_serializable_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_label_test.js b/tests/mocha/field_label_test.js
index cf5b4904493..bae600aff19 100644
--- a/tests/mocha/field_label_test.js
+++ b/tests/mocha/field_label_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createTestBlock} from './test_helpers/block_definitions.js';
 import {
   assertFieldValue,
diff --git a/tests/mocha/field_number_test.js b/tests/mocha/field_number_test.js
index 768766bf013..3c12fed820d 100644
--- a/tests/mocha/field_number_test.js
+++ b/tests/mocha/field_number_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineRowBlock} from './test_helpers/block_definitions.js';
 import {runTestCases} from './test_helpers/common.js';
 import {
diff --git a/tests/mocha/field_registry_test.js b/tests/mocha/field_registry_test.js
index 26b33c16c3d..1f19477dee1 100644
--- a/tests/mocha/field_registry_test.js
+++ b/tests/mocha/field_registry_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/field_test.js b/tests/mocha/field_test.js
index 38f9662d6d6..422b0473418 100644
--- a/tests/mocha/field_test.js
+++ b/tests/mocha/field_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addBlockTypeToCleanup,
   addMessageToCleanup,
diff --git a/tests/mocha/field_textinput_test.js b/tests/mocha/field_textinput_test.js
index 7dc105f72f0..7cafd00d948 100644
--- a/tests/mocha/field_textinput_test.js
+++ b/tests/mocha/field_textinput_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/field_variable_test.js b/tests/mocha/field_variable_test.js
index 2dc8d35a55c..58a20977521 100644
--- a/tests/mocha/field_variable_test.js
+++ b/tests/mocha/field_variable_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createTestBlock,
   defineRowBlock,
diff --git a/tests/mocha/flyout_test.js b/tests/mocha/flyout_test.js
index f6d3019df55..998279a0874 100644
--- a/tests/mocha/flyout_test.js
+++ b/tests/mocha/flyout_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/focus_manager_test.js b/tests/mocha/focus_manager_test.js
index 26dcb8dbe68..490fa4301b8 100644
--- a/tests/mocha/focus_manager_test.js
+++ b/tests/mocha/focus_manager_test.js
@@ -8,7 +8,7 @@ import {
   FocusManager,
   getFocusManager,
 } from '../../build/src/core/focus_manager.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/focusable_tree_traverser_test.js b/tests/mocha/focusable_tree_traverser_test.js
index 0f88e1106f9..a384dd4be45 100644
--- a/tests/mocha/focusable_tree_traverser_test.js
+++ b/tests/mocha/focusable_tree_traverser_test.js
@@ -6,7 +6,7 @@
 
 import {FocusManager} from '../../build/src/core/focus_manager.js';
 import {FocusableTreeTraverser} from '../../build/src/core/utils/focusable_tree_traverser.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/generator_test.js b/tests/mocha/generator_test.js
index 527448eacc9..3c377e7c1ab 100644
--- a/tests/mocha/generator_test.js
+++ b/tests/mocha/generator_test.js
@@ -10,7 +10,7 @@ import {JavascriptGenerator} from '../../build/src/generators/javascript/javascr
 import {LuaGenerator} from '../../build/src/generators/lua/lua_generator.js';
 import {PhpGenerator} from '../../build/src/generators/php/php_generator.js';
 import {PythonGenerator} from '../../build/src/generators/python/python_generator.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/gesture_test.js b/tests/mocha/gesture_test.js
index 3f53b8894b9..af4c599fea3 100644
--- a/tests/mocha/gesture_test.js
+++ b/tests/mocha/gesture_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineBasicBlockWithField} from './test_helpers/block_definitions.js';
 import {assertEventFired, assertEventNotFired} from './test_helpers/events.js';
 import {
diff --git a/tests/mocha/icon_test.js b/tests/mocha/icon_test.js
index 5855fcfc576..ba1b7116065 100644
--- a/tests/mocha/icon_test.js
+++ b/tests/mocha/icon_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineEmptyBlock} from './test_helpers/block_definitions.js';
 import {MockIcon, MockSerializableIcon} from './test_helpers/icon_mocks.js';
 import {
diff --git a/tests/mocha/input_test.js b/tests/mocha/input_test.js
index 0c2b0973eaf..dfa30858e0e 100644
--- a/tests/mocha/input_test.js
+++ b/tests/mocha/input_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/insertion_marker_test.js b/tests/mocha/insertion_marker_test.js
index 9ccf8a00b0f..f8215a847eb 100644
--- a/tests/mocha/insertion_marker_test.js
+++ b/tests/mocha/insertion_marker_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/jso_deserialization_test.js b/tests/mocha/jso_deserialization_test.js
index dfd3e62b7f2..f6b47d7de6a 100644
--- a/tests/mocha/jso_deserialization_test.js
+++ b/tests/mocha/jso_deserialization_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   MockParameterModel,
diff --git a/tests/mocha/jso_serialization_test.js b/tests/mocha/jso_serialization_test.js
index 7cf415e676a..4a7d5e9e1d3 100644
--- a/tests/mocha/jso_serialization_test.js
+++ b/tests/mocha/jso_serialization_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineRowBlock,
   defineStackBlock,
diff --git a/tests/mocha/json_test.js b/tests/mocha/json_test.js
index 471d2fb9711..2e4b68df9ec 100644
--- a/tests/mocha/json_test.js
+++ b/tests/mocha/json_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addMessageToCleanup,
   sharedTestSetup,
diff --git a/tests/mocha/keyboard_navigation_controller_test.js b/tests/mocha/keyboard_navigation_controller_test.js
index c7abd863ec1..dd81e9e4b45 100644
--- a/tests/mocha/keyboard_navigation_controller_test.js
+++ b/tests/mocha/keyboard_navigation_controller_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/layering_test.js b/tests/mocha/layering_test.js
index 1ef0ee6973d..b84f23252b3 100644
--- a/tests/mocha/layering_test.js
+++ b/tests/mocha/layering_test.js
@@ -3,7 +3,7 @@
  * Copyright 2023 Google LLC
  * SPDX-License-Identifier: Apache-2.0
  */
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/metrics_test.js b/tests/mocha/metrics_test.js
index 860e802550d..de9a5641ad7 100644
--- a/tests/mocha/metrics_test.js
+++ b/tests/mocha/metrics_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/mutator_test.js b/tests/mocha/mutator_test.js
index fb6d8caf09b..72b17d0a4bb 100644
--- a/tests/mocha/mutator_test.js
+++ b/tests/mocha/mutator_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   createRenderedBlock,
   defineMutatorBlocks,
diff --git a/tests/mocha/names_test.js b/tests/mocha/names_test.js
index 732e28cd57a..e449a59fd6c 100644
--- a/tests/mocha/names_test.js
+++ b/tests/mocha/names_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/navigation_test.js b/tests/mocha/navigation_test.js
index 5bed2aaab8c..38dc88894b1 100644
--- a/tests/mocha/navigation_test.js
+++ b/tests/mocha/navigation_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/old_workspace_comment_test.js b/tests/mocha/old_workspace_comment_test.js
index 08a2523f50e..5038d67bad8 100644
--- a/tests/mocha/old_workspace_comment_test.js
+++ b/tests/mocha/old_workspace_comment_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/procedure_map_test.js b/tests/mocha/procedure_map_test.js
index eebd5a9f326..5e29c6ca050 100644
--- a/tests/mocha/procedure_map_test.js
+++ b/tests/mocha/procedure_map_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {MockProcedureModel} from './test_helpers/procedures.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/rect_test.js b/tests/mocha/rect_test.js
index 37712dff3a0..652837eaef6 100644
--- a/tests/mocha/rect_test.js
+++ b/tests/mocha/rect_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/registry_test.js b/tests/mocha/registry_test.js
index 6bcb8b5b077..2d5e22543ca 100644
--- a/tests/mocha/registry_test.js
+++ b/tests/mocha/registry_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/render_management_test.js b/tests/mocha/render_management_test.js
index 4de0635394b..94fa48805cf 100644
--- a/tests/mocha/render_management_test.js
+++ b/tests/mocha/render_management_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/serializer_test.js b/tests/mocha/serializer_test.js
index a3a3761e9c6..efd1f308b01 100644
--- a/tests/mocha/serializer_test.js
+++ b/tests/mocha/serializer_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   TestCase,
   TestSuite,
diff --git a/tests/mocha/shortcut_items_test.js b/tests/mocha/shortcut_items_test.js
index d96ddbfeadc..dfbae3f0901 100644
--- a/tests/mocha/shortcut_items_test.js
+++ b/tests/mocha/shortcut_items_test.js
@@ -5,7 +5,7 @@
  */
 
 import * as Blockly from '../../build/src/core/blockly.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/shortcut_registry_test.js b/tests/mocha/shortcut_registry_test.js
index 5641e17c7d1..a06f01b9c00 100644
--- a/tests/mocha/shortcut_registry_test.js
+++ b/tests/mocha/shortcut_registry_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {createTestBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/test_helpers/code_generation.js b/tests/mocha/test_helpers/code_generation.js
index 95bd902cd45..e61a45653b2 100644
--- a/tests/mocha/test_helpers/code_generation.js
+++ b/tests/mocha/test_helpers/code_generation.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestSuites} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/events.js b/tests/mocha/test_helpers/events.js
index c074bdd77a4..3e0b1e95d8b 100644
--- a/tests/mocha/test_helpers/events.js
+++ b/tests/mocha/test_helpers/events.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Creates spy for workspace fireChangeListener
diff --git a/tests/mocha/test_helpers/fields.js b/tests/mocha/test_helpers/fields.js
index e082abb4ccc..ab304a808a7 100644
--- a/tests/mocha/test_helpers/fields.js
+++ b/tests/mocha/test_helpers/fields.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestCases, TestCase} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/procedures.js b/tests/mocha/test_helpers/procedures.js
index ecf8c13adcc..16ef973350f 100644
--- a/tests/mocha/test_helpers/procedures.js
+++ b/tests/mocha/test_helpers/procedures.js
@@ -6,7 +6,7 @@
 
 import {ConnectionType} from '../../../build/src/core/connection_type.js';
 import {VariableModel} from '../../../build/src/core/variable_model.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Asserts that the procedure definition or call block has the expected var
diff --git a/tests/mocha/test_helpers/serialization.js b/tests/mocha/test_helpers/serialization.js
index c99f508d4dc..c476eae3d6f 100644
--- a/tests/mocha/test_helpers/serialization.js
+++ b/tests/mocha/test_helpers/serialization.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {runTestCases} from './common.js';
 
 /**
diff --git a/tests/mocha/test_helpers/variables.js b/tests/mocha/test_helpers/variables.js
index 83f175f6327..dd19b4904c9 100644
--- a/tests/mocha/test_helpers/variables.js
+++ b/tests/mocha/test_helpers/variables.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Check if a variable with the given values exists.
diff --git a/tests/mocha/test_helpers/warnings.js b/tests/mocha/test_helpers/warnings.js
index 0e07f846c5a..d718a25c166 100644
--- a/tests/mocha/test_helpers/warnings.js
+++ b/tests/mocha/test_helpers/warnings.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 
 /**
  * Captures the strings sent to console.warn() when calling a function.
diff --git a/tests/mocha/test_helpers/workspace.js b/tests/mocha/test_helpers/workspace.js
index 917ce6f629e..b5f3cadabd3 100644
--- a/tests/mocha/test_helpers/workspace.js
+++ b/tests/mocha/test_helpers/workspace.js
@@ -5,7 +5,7 @@
  */
 
 import * as eventUtils from '../../../build/src/core/events/utils.js';
-import {assert} from '../../../node_modules/chai/chai.js';
+import {assert} from '../../../node_modules/chai/index.js';
 import {workspaceTeardown} from './setup_teardown.js';
 import {assertVariableValues} from './variables.js';
 import {assertWarnings} from './warnings.js';
diff --git a/tests/mocha/theme_test.js b/tests/mocha/theme_test.js
index 1f425dca6a3..f54641a348f 100644
--- a/tests/mocha/theme_test.js
+++ b/tests/mocha/theme_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/toast_test.js b/tests/mocha/toast_test.js
index 45e02ad5de8..afb7f7f6cb9 100644
--- a/tests/mocha/toast_test.js
+++ b/tests/mocha/toast_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/toolbox_test.js b/tests/mocha/toolbox_test.js
index 4e92cd28fd3..480fdfdc6fc 100644
--- a/tests/mocha/toolbox_test.js
+++ b/tests/mocha/toolbox_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   sharedTestSetup,
diff --git a/tests/mocha/tooltip_test.js b/tests/mocha/tooltip_test.js
index 1edc8ad6e25..0695b9ebe03 100644
--- a/tests/mocha/tooltip_test.js
+++ b/tests/mocha/tooltip_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/touch_test.js b/tests/mocha/touch_test.js
index 775665643b7..30a9fe72724 100644
--- a/tests/mocha/touch_test.js
+++ b/tests/mocha/touch_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/trashcan_test.js b/tests/mocha/trashcan_test.js
index 5486326f1e0..d96e00f3a21 100644
--- a/tests/mocha/trashcan_test.js
+++ b/tests/mocha/trashcan_test.js
@@ -6,7 +6,7 @@
 
 import {EventType} from '../../build/src/core/events/type.js';
 import * as eventUtils from '../../build/src/core/events/utils.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   defineBasicBlockWithField,
   defineMutatorBlocks,
diff --git a/tests/mocha/utils_test.js b/tests/mocha/utils_test.js
index b6228448db7..accf164b79b 100644
--- a/tests/mocha/utils_test.js
+++ b/tests/mocha/utils_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/variable_map_test.js b/tests/mocha/variable_map_test.js
index 2d6cee0b94a..76dffbe9dc7 100644
--- a/tests/mocha/variable_map_test.js
+++ b/tests/mocha/variable_map_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   assertEventNotFired,
diff --git a/tests/mocha/variable_model_test.js b/tests/mocha/variable_model_test.js
index cd2a89db420..eee7ea9bf41 100644
--- a/tests/mocha/variable_model_test.js
+++ b/tests/mocha/variable_model_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/widget_div_test.js b/tests/mocha/widget_div_test.js
index 61c94247110..4ad31f96c72 100644
--- a/tests/mocha/widget_div_test.js
+++ b/tests/mocha/widget_div_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   sharedTestSetup,
   sharedTestTeardown,
diff --git a/tests/mocha/workspace_comment_test.js b/tests/mocha/workspace_comment_test.js
index 3ce276e8579..bb87ad82ac6 100644
--- a/tests/mocha/workspace_comment_test.js
+++ b/tests/mocha/workspace_comment_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   assertEventFired,
   createChangeListenerSpy,
diff --git a/tests/mocha/workspace_svg_test.js b/tests/mocha/workspace_svg_test.js
index 207cad45dc7..6193dda2db7 100644
--- a/tests/mocha/workspace_svg_test.js
+++ b/tests/mocha/workspace_svg_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {defineStackBlock} from './test_helpers/block_definitions.js';
 import {
   assertEventFired,
diff --git a/tests/mocha/xml_test.js b/tests/mocha/xml_test.js
index 218324197bf..cd1bce128bb 100644
--- a/tests/mocha/xml_test.js
+++ b/tests/mocha/xml_test.js
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {
   addBlockTypeToCleanup,
   createGenUidStubWithReturns,
diff --git a/tests/mocha/zoom_controls_test.js b/tests/mocha/zoom_controls_test.js
index dedc36b75b4..d9bb0f91e9b 100644
--- a/tests/mocha/zoom_controls_test.js
+++ b/tests/mocha/zoom_controls_test.js
@@ -5,7 +5,7 @@
  */
 
 import {EventType} from '../../build/src/core/events/type.js';
-import {assert} from '../../node_modules/chai/chai.js';
+import {assert} from '../../node_modules/chai/index.js';
 import {assertEventFired, assertEventNotFired} from './test_helpers/events.js';
 import {
   sharedTestSetup,

From 90580a8655f754b0c158be917b04925a1e83690d Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Wed, 27 Aug 2025 19:12:06 +0100
Subject: [PATCH 43/52] chore(deps): bump eslint from 9.30.0 to 9.34.0 (#9329)

Bumps [eslint](https://github.com/eslint/eslint) from 9.30.0 to 9.34.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v9.30.0...v9.34.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 9.34.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
---
 package-lock.json | 60 +++++++++++++++++++++--------------------------
 1 file changed, 27 insertions(+), 33 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index f7a8f9426b9..847c0d79512 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -445,19 +445,21 @@
       }
     },
     "node_modules/@eslint/config-helpers": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/@eslint/config-helpers/-/config-helpers-0.3.0.tgz",
-      "integrity": "sha512-ViuymvFmcJi04qdZeDc2whTHryouGcDlaxPqarTD0ZE10ISpxGUVZGZDx4w01upyIynL3iu6IXH2bS1NhclQMw==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@eslint/config-helpers/-/config-helpers-0.3.1.tgz",
+      "integrity": "sha512-xR93k9WhrDYpXHORXpxVL5oHj3Era7wo6k/Wd8/IsQNnZUTzkGS29lyn3nAT05v6ltUuTFVCCYDEGfy2Or/sPA==",
       "dev": true,
+      "license": "Apache-2.0",
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
     "node_modules/@eslint/core": {
-      "version": "0.14.0",
-      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.14.0.tgz",
-      "integrity": "sha512-qIbV0/JZr7iSDjqAc60IqbLdsj9GDt16xQtWD+B78d/HAlvysGdZZ6rpJHGAc2T0FQx1X6thsSPdnoiGKdNtdg==",
+      "version": "0.15.2",
+      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.2.tgz",
+      "integrity": "sha512-78Md3/Rrxh83gCxoUc0EiciuOHsIITzLy53m3d9UyiW8y9Dj2D29FeETqyKA+BRK76tnTp6RXWb3pCay8Oyomg==",
       "dev": true,
+      "license": "Apache-2.0",
       "dependencies": {
         "@types/json-schema": "^7.0.15"
       },
@@ -527,10 +529,11 @@
       "license": "MIT"
     },
     "node_modules/@eslint/js": {
-      "version": "9.30.0",
-      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.30.0.tgz",
-      "integrity": "sha512-Wzw3wQwPvc9sHM+NjakWTcPx11mbZyiYHuwWa/QfZ7cIRX7WK54PSk7bdyXDaoaopUcMatv1zaQvOAAO8hCdww==",
+      "version": "9.34.0",
+      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.34.0.tgz",
+      "integrity": "sha512-EoyvqQnBNsV1CWaEJ559rxXL4c8V92gxirbawSmVUOWXlsRxxQXl6LmCpdUblgxgSkDIqKnhzba2SjRTI/A5Rw==",
       "dev": true,
+      "license": "MIT",
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       },
@@ -548,30 +551,19 @@
       }
     },
     "node_modules/@eslint/plugin-kit": {
-      "version": "0.3.3",
-      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.3.tgz",
-      "integrity": "sha512-1+WqvgNMhmlAambTvT3KPtCl/Ibr68VldY2XY40SL1CE0ZXiakFR/cbTspaF5HsnpDMvcYYoJHfl4980NBjGag==",
+      "version": "0.3.5",
+      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.5.tgz",
+      "integrity": "sha512-Z5kJ+wU3oA7MMIqVR9tyZRtjYPr4OC004Q4Rw7pgOKUOKkJfZ3O24nz3WYfGRpMDNmcOi3TwQOmgm7B7Tpii0w==",
       "dev": true,
+      "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/core": "^0.15.1",
+        "@eslint/core": "^0.15.2",
         "levn": "^0.4.1"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
-    "node_modules/@eslint/plugin-kit/node_modules/@eslint/core": {
-      "version": "0.15.1",
-      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.1.tgz",
-      "integrity": "sha512-bkOp+iumZCCbt1K1CmWf0R9pM5yKpDv+ZXtvSyQpudrI9kuFLp+bM2WOPXImuD/ceQuaa8f5pj93Y7zyECIGNA==",
-      "dev": true,
-      "dependencies": {
-        "@types/json-schema": "^7.0.15"
-      },
-      "engines": {
-        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
-      }
-    },
     "node_modules/@gulp-sourcemaps/identity-map": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/@gulp-sourcemaps/identity-map/-/identity-map-2.0.1.tgz",
@@ -1528,7 +1520,8 @@
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
       "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
-      "dev": true
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/node": {
       "version": "20.16.3",
@@ -3970,19 +3963,20 @@
       }
     },
     "node_modules/eslint": {
-      "version": "9.30.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.30.0.tgz",
-      "integrity": "sha512-iN/SiPxmQu6EVkf+m1qpBxzUhE12YqFLOSySuOyVLJLEF9nzTf+h/1AJYc1JWzCnktggeNrjvQGLngDzXirU6g==",
+      "version": "9.34.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.34.0.tgz",
+      "integrity": "sha512-RNCHRX5EwdrESy3Jc9o8ie8Bog+PeYvvSR8sDGoZxNFTvZ4dlxUB3WzQ3bQMztFrSRODGrLLj8g6OFuGY/aiQg==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.12.1",
         "@eslint/config-array": "^0.21.0",
-        "@eslint/config-helpers": "^0.3.0",
-        "@eslint/core": "^0.14.0",
+        "@eslint/config-helpers": "^0.3.1",
+        "@eslint/core": "^0.15.2",
         "@eslint/eslintrc": "^3.3.1",
-        "@eslint/js": "9.30.0",
-        "@eslint/plugin-kit": "^0.3.1",
+        "@eslint/js": "9.34.0",
+        "@eslint/plugin-kit": "^0.3.5",
         "@humanfs/node": "^0.16.6",
         "@humanwhocodes/module-importer": "^1.0.1",
         "@humanwhocodes/retry": "^0.4.2",

From f10454cb360321f3b9d64c2769e7bff4cc976756 Mon Sep 17 00:00:00 2001
From: Christopher Allen <cpcallen+git@google.com>
Date: Wed, 27 Aug 2025 19:18:20 +0100
Subject: [PATCH 44/52] chore: Add node.js v24 to CI build matrix (#9219)

Node.js v24 has now been released, so add it to our build matrix.

Node v18 is no longer in LTS but we want to continue to test on
it until it is removed from package.json engines.
---
 .github/workflows/build.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d7a4e786ce6..cdec5308279 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
         # TODO (#2114): re-enable osx build.
         # os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [18.x, 20.x, 22.x, 24.x]
         # See supported Node.js release schedule at
         # https://nodejs.org/en/about/releases/
 

From b0569c4a576e3918d8f8c646947331ba7bdb99ad Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Wed, 27 Aug 2025 12:28:06 -0700
Subject: [PATCH 45/52] fix: Prevent mocha tests failures when window does not
 have focus. (#9332)

* chore: Add puppeteer-core as a dev dependency.

* fix: Make mocha tests run in a fake-focused window.

* fix: Make `test:mocha:interactive` use the same gulp codepath as `test`.
---
 gulpfile.mjs                     |  7 ++-
 package-lock.json                | 89 +++++++++++++++++++++++++++-----
 package.json                     |  3 +-
 scripts/gulpfiles/test_tasks.mjs | 12 ++++-
 tests/mocha/webdriver.js         | 18 ++++++-
 5 files changed, 111 insertions(+), 18 deletions(-)

diff --git a/gulpfile.mjs b/gulpfile.mjs
index fd3de3bde8c..ad61bcb516d 100644
--- a/gulpfile.mjs
+++ b/gulpfile.mjs
@@ -45,7 +45,11 @@ import {
   publishBeta,
   recompile,
 } from './scripts/gulpfiles/release_tasks.mjs';
-import {generators, test} from './scripts/gulpfiles/test_tasks.mjs';
+import {
+  generators,
+  interactiveMocha,
+  test,
+} from './scripts/gulpfiles/test_tasks.mjs';
 
 const clean = parallel(cleanBuildDir, cleanReleaseDir);
 
@@ -80,6 +84,7 @@ export {
   clean,
   test,
   generators as testGenerators,
+  interactiveMocha,
   buildAdvancedCompilationTest,
   createRC as gitCreateRC,
   docs,
diff --git a/package-lock.json b/package-lock.json
index 847c0d79512..08c105c6980 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -51,6 +51,7 @@
         "patch-package": "^8.0.0",
         "prettier": "^3.3.3",
         "prettier-plugin-organize-imports": "^4.0.0",
+        "puppeteer-core": "^24.17.0",
         "readline-sync": "^1.4.10",
         "rimraf": "^5.0.0",
         "typescript": "^5.3.3",
@@ -1282,18 +1283,18 @@
       }
     },
     "node_modules/@puppeteer/browsers": {
-      "version": "2.10.4",
-      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.10.4.tgz",
-      "integrity": "sha512-9DxbZx+XGMNdjBynIs4BRSz+M3iRDeB7qRcAr6UORFLphCIM2x3DXgOucvADiifcqCE4XePFUKcnaAMyGbrDlQ==",
+      "version": "2.10.7",
+      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.10.7.tgz",
+      "integrity": "sha512-wHWLkQWBjHtajZeqCB74nsa/X70KheyOhySYBRmVQDJiNj0zjZR/naPCvdWjMhcG1LmjaMV/9WtTo5mpe8qWLw==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "debug": "^4.4.0",
+        "debug": "^4.4.1",
         "extract-zip": "^2.0.1",
         "progress": "^2.0.3",
         "proxy-agent": "^6.5.0",
-        "semver": "^7.7.1",
-        "tar-fs": "^3.0.8",
+        "semver": "^7.7.2",
+        "tar-fs": "^3.1.0",
         "yargs": "^17.7.2"
       },
       "bin": {
@@ -2960,6 +2961,20 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/chromium-bidi": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/chromium-bidi/-/chromium-bidi-8.0.0.tgz",
+      "integrity": "sha512-d1VmE0FD7lxZQHzcDUCKZSNRtRwISXDsdg4HjdTR5+Ll5nQ/vzU12JeNmupD6VWffrPSlrnGhEWlLESKH3VO+g==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "mitt": "^3.0.1",
+        "zod": "^3.24.1"
+      },
+      "peerDependencies": {
+        "devtools-protocol": "*"
+      }
+    },
     "node_modules/ci-info": {
       "version": "3.8.0",
       "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-3.8.0.tgz",
@@ -3612,6 +3627,13 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/devtools-protocol": {
+      "version": "0.0.1475386",
+      "resolved": "https://registry.npmjs.org/devtools-protocol/-/devtools-protocol-0.0.1475386.tgz",
+      "integrity": "sha512-RQ809ykTfJ+dgj9bftdeL2vRVxASAuGU+I9LEx9Ij5TXU5HrgAQVmzi72VA+mkzscE12uzlRv5/tWWv9R9J1SA==",
+      "dev": true,
+      "license": "BSD-3-Clause"
+    },
     "node_modules/diff": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/diff/-/diff-7.0.0.tgz",
@@ -6895,6 +6917,13 @@
         "node": ">=16 || 14 >=14.17"
       }
     },
+    "node_modules/mitt": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/mitt/-/mitt-3.0.1.tgz",
+      "integrity": "sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/mkdirp": {
       "version": "0.5.6",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
@@ -7925,6 +7954,24 @@
         "node": ">=6"
       }
     },
+    "node_modules/puppeteer-core": {
+      "version": "24.17.0",
+      "resolved": "https://registry.npmjs.org/puppeteer-core/-/puppeteer-core-24.17.0.tgz",
+      "integrity": "sha512-RYOBKFiF+3RdwIZTEacqNpD567gaFcBAOKTT7742FdB1icXudrPI7BlZbYTYWK2wgGQUXt9Zi1Yn+D5PmCs4CA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@puppeteer/browsers": "2.10.7",
+        "chromium-bidi": "8.0.0",
+        "debug": "^4.4.1",
+        "devtools-protocol": "0.0.1475386",
+        "typed-query-selector": "^2.12.0",
+        "ws": "^8.18.3"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/qs": {
       "version": "6.14.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
@@ -8993,9 +9040,9 @@
       }
     },
     "node_modules/tar-fs": {
-      "version": "3.0.9",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.0.9.tgz",
-      "integrity": "sha512-XF4w9Xp+ZQgifKakjZYmFdkLoSWd34VGKcsTCwlNWM7QG3ZbaxnTsaBwnjFZqHRf/rROxaR8rXnbtwdvaDI+lA==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.1.0.tgz",
+      "integrity": "sha512-5Mty5y/sOF1YWj1J6GiBodjlDc05CUR8PKXrsnFAiSG0xA+GHeWLovaZPYUDXkH/1iKRf2+M5+OrRgzC7O9b7w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -9212,6 +9259,13 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/typed-query-selector": {
+      "version": "2.12.0",
+      "resolved": "https://registry.npmjs.org/typed-query-selector/-/typed-query-selector-2.12.0.tgz",
+      "integrity": "sha512-SbklCd1F0EiZOyPiW192rrHZzZ5sBijB6xM+cpmrwDqObvdtunOHHIk9fCGsoK5JVIYXoyEp4iEdE3upFH3PAg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/typedarray": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
@@ -9773,9 +9827,10 @@
       "dev": true
     },
     "node_modules/ws": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
-      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
+      "license": "MIT",
       "engines": {
         "node": ">=10.0.0"
       },
@@ -10029,6 +10084,16 @@
       "dependencies": {
         "safe-buffer": "~5.2.0"
       }
+    },
+    "node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index c52a79003e9..9ba8ebe6142 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "test": "gulp test",
     "test:browser": "cd tests/browser && npx mocha",
     "test:generators": "gulp testGenerators",
-    "test:mocha:interactive": "npm run build && concurrently -n tsc,server \"tsc --watch --preserveWatchOutput --outDir \"build/src\" --declarationDir \"build/declarations\"\" \"http-server ./ -o /tests/mocha/index.html -c-1\"",
+    "test:mocha:interactive": "npm run build && concurrently -n tsc,server \"tsc --watch --preserveWatchOutput --outDir \"build/src\" --declarationDir \"build/declarations\"\" \"gulp interactiveMocha\"",
     "test:compile:advanced": "gulp buildAdvancedCompilationTest --debug",
     "updateGithubPages": "npm ci && gulp gitUpdateGithubPages"
   },
@@ -138,6 +138,7 @@
     "patch-package": "^8.0.0",
     "prettier": "^3.3.3",
     "prettier-plugin-organize-imports": "^4.0.0",
+    "puppeteer-core": "^24.17.0",
     "readline-sync": "^1.4.10",
     "rimraf": "^5.0.0",
     "typescript": "^5.3.3",
diff --git a/scripts/gulpfiles/test_tasks.mjs b/scripts/gulpfiles/test_tasks.mjs
index d4b73cdb3c1..37f9884440d 100644
--- a/scripts/gulpfiles/test_tasks.mjs
+++ b/scripts/gulpfiles/test_tasks.mjs
@@ -257,9 +257,9 @@ async function metadata() {
  * Run Mocha tests inside a browser.
  * @return {Promise} Asynchronous result.
  */
-async function mocha() {
+async function mocha(exitOnCompletion = true) {
   return runTestTask('mocha', async () => {
-    const result = await runMochaTestsInBrowser().catch(e => {
+    const result = await runMochaTestsInBrowser(exitOnCompletion).catch(e => {
       throw e;
     });
     if (result) {
@@ -269,6 +269,14 @@ async function mocha() {
   });
 }
 
+/**
+ * Run Mocha tests inside a browser and keep the browser open upon completion.
+ * @return {Promise} Asynchronous result.
+ */
+export async function interactiveMocha() {
+  return mocha(false);
+}
+
 /**
  * Helper method for comparison file.
  * @param {string} file1 First target file.
diff --git a/tests/mocha/webdriver.js b/tests/mocha/webdriver.js
index 207917c5e6b..06e7a3e6585 100644
--- a/tests/mocha/webdriver.js
+++ b/tests/mocha/webdriver.js
@@ -15,9 +15,12 @@ const {posixPath} = require('../../scripts/helpers');
  * Runs the Mocha tests in this directory in Chrome. It uses webdriverio to
  * launch Chrome and load index.html. Outputs a summary of the test results
  * to the console.
+ *
+ * @param {boolean} exitOnCompletetion True if the browser should automatically
+ *     quit after tests have finished running.
  * @return {number} 0 on success, 1 on failure.
  */
-async function runMochaTestsInBrowser() {
+async function runMochaTestsInBrowser(exitOnCompletion = true) {
   const options = {
     capabilities: {
       browserName: 'chrome',
@@ -45,6 +48,17 @@ async function runMochaTestsInBrowser() {
   console.log('Loading URL: ' + url);
   await browser.url(url);
 
+  // Toggle the devtools setting to emulate focus, so that the window will
+  // always act as if it has focus regardless of the state of the window manager
+  // or operating system. This improves the reliability of FocusManager-related
+  // tests.
+  const puppeteer = await browser.getPuppeteer();
+  await browser.call(async () => {
+    const page = (await puppeteer.pages())[0];
+    const session = await page.createCDPSession();
+    await session.send('Emulation.setFocusEmulationEnabled', { enabled: true });
+  });
+
   await browser.waitUntil(async() => {
     const elem = await browser.$('#failureCount');
     const text = await elem.getAttribute('tests_failed');
@@ -74,7 +88,7 @@ async function runMochaTestsInBrowser() {
   if (parseInt(numOfFailure) !== 0) {
     return 1;
   }
-  await browser.deleteSession();
+  if (exitOnCompletion) await browser.deleteSession();
   return 0;
 }
 

From e51efe4855f96554fd552b175e8ae10d15f912bf Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 28 Aug 2025 10:06:52 -0700
Subject: [PATCH 46/52] fix: Fix bug that could cause errant line when
 rendering. (#9333)

---
 core/renderers/common/drawer.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/core/renderers/common/drawer.ts b/core/renderers/common/drawer.ts
index 7046406adc7..c474bc8c339 100644
--- a/core/renderers/common/drawer.ts
+++ b/core/renderers/common/drawer.ts
@@ -122,9 +122,12 @@ export class Drawer {
       } else if (Types.isSpacer(elem)) {
         this.outlinePath_ += svgPaths.lineOnAxis('h', elem.width);
       }
+      // No branch for a square corner, because it's a no-op.
     }
-    // No branch for a square corner, because it's a no-op.
-    this.outlinePath_ += svgPaths.lineOnAxis('v', topRow.height);
+    this.outlinePath_ += svgPaths.lineOnAxis(
+      'v',
+      topRow.height - topRow.ascenderHeight,
+    );
   }
 
   /**

From 5afc0d6692f1a2403dc9a6024920111f23e25487 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 28 Aug 2025 11:28:40 -0700
Subject: [PATCH 47/52] refactor: Make focusable elements responsible for
 scrolling themselves into bounds. (#9288)

* refactor: Make focusable elements responsible for scrolling themselves into bounds.

* chore: Add tests for scrolling focused elements into view.

* fix: Removed inadvertent `.only`.

* fix: Scroll parent block of connections into bounds on focus.
---
 core/block_svg.ts                            |   3 +
 core/bubbles/bubble.ts                       |   4 +
 core/comments/comment_bar_button.ts          |   8 +-
 core/comments/comment_editor.ts              |  13 +-
 core/comments/rendered_workspace_comment.ts  |   1 +
 core/field.ts                                |   7 +-
 core/flyout_button.ts                        |   6 +-
 core/icons/icon.ts                           |  12 +-
 core/keyboard_nav/line_cursor.ts             |  30 +--
 core/rendered_connection.ts                  |   7 +-
 tests/browser/test/basic_playground_test.mjs | 221 +++++++++++++++++++
 11 files changed, 276 insertions(+), 36 deletions(-)

diff --git a/core/block_svg.ts b/core/block_svg.ts
index c6065282a5c..b3fdeb2d6b6 100644
--- a/core/block_svg.ts
+++ b/core/block_svg.ts
@@ -1844,6 +1844,9 @@ export class BlockSvg
   /** See IFocusableNode.onNodeFocus. */
   onNodeFocus(): void {
     this.select();
+    this.workspace.scrollBoundsIntoView(
+      this.getBoundingRectangleWithoutChildren(),
+    );
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/bubbles/bubble.ts b/core/bubbles/bubble.ts
index c42e602544e..742d300adf1 100644
--- a/core/bubbles/bubble.ts
+++ b/core/bubbles/bubble.ts
@@ -707,6 +707,10 @@ export abstract class Bubble implements IBubble, ISelectable, IFocusableNode {
   onNodeFocus(): void {
     this.select();
     this.bringToFront();
+    const xy = this.getRelativeToSurfaceXY();
+    const size = this.getSize();
+    const bounds = new Rect(xy.y, xy.y + size.height, xy.x, xy.x + size.width);
+    this.workspace.scrollBoundsIntoView(bounds);
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/comments/comment_bar_button.ts b/core/comments/comment_bar_button.ts
index 24a084ad26e..be130b0e335 100644
--- a/core/comments/comment_bar_button.ts
+++ b/core/comments/comment_bar_button.ts
@@ -87,7 +87,13 @@ export abstract class CommentBarButton implements IFocusableNode {
   }
 
   /** Called when this button's focusable DOM element gains focus. */
-  onNodeFocus() {}
+  onNodeFocus() {
+    const commentView = this.getCommentView();
+    const xy = commentView.getRelativeToSurfaceXY();
+    const size = commentView.getSize();
+    const bounds = new Rect(xy.y, xy.y + size.height, xy.x, xy.x + size.width);
+    commentView.workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** Called when this button's focusable DOM element loses focus. */
   onNodeBlur() {}
diff --git a/core/comments/comment_editor.ts b/core/comments/comment_editor.ts
index ac1559c4b3d..b4c741ba1ad 100644
--- a/core/comments/comment_editor.ts
+++ b/core/comments/comment_editor.ts
@@ -10,8 +10,10 @@ import {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import {IFocusableTree} from '../interfaces/i_focusable_tree.js';
 import * as touch from '../touch.js';
 import * as dom from '../utils/dom.js';
+import {Rect} from '../utils/rect.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
+import * as svgMath from '../utils/svg_math.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
 
 /**
@@ -188,7 +190,16 @@ export class CommentEditor implements IFocusableNode {
   getFocusableTree(): IFocusableTree {
     return this.workspace;
   }
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const bbox = Rect.from(this.foreignObject.getBoundingClientRect());
+    this.workspace.scrollBoundsIntoView(
+      Rect.createFromPoint(
+        svgMath.screenToWsCoordinates(this.workspace, bbox.getOrigin()),
+        bbox.getWidth(),
+        bbox.getHeight(),
+      ),
+    );
+  }
   onNodeBlur(): void {}
   canBeFocused(): boolean {
     if (this.id) return true;
diff --git a/core/comments/rendered_workspace_comment.ts b/core/comments/rendered_workspace_comment.ts
index 49c75e60883..2903bff4bce 100644
--- a/core/comments/rendered_workspace_comment.ts
+++ b/core/comments/rendered_workspace_comment.ts
@@ -347,6 +347,7 @@ export class RenderedWorkspaceComment
     this.select();
     // Ensure that the comment is always at the top when focused.
     this.workspace.getLayerManager()?.append(this, layers.BLOCK);
+    this.workspace.scrollBoundsIntoView(this.getBoundingRectangle());
   }
 
   /** See IFocusableNode.onNodeBlur. */
diff --git a/core/field.ts b/core/field.ts
index d993e197d23..e025efab709 100644
--- a/core/field.ts
+++ b/core/field.ts
@@ -1380,7 +1380,12 @@ export abstract class Field<T = any>
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const block = this.getSourceBlock() as BlockSvg;
+    block.workspace.scrollBoundsIntoView(
+      block.getBoundingRectangleWithoutChildren(),
+    );
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/flyout_button.ts b/core/flyout_button.ts
index c9afb8b0159..5a066a23b11 100644
--- a/core/flyout_button.ts
+++ b/core/flyout_button.ts
@@ -398,7 +398,11 @@ export class FlyoutButton
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const xy = this.getPosition();
+    const bounds = new Rect(xy.y, xy.y + this.height, xy.x, xy.x + this.width);
+    this.workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/icons/icon.ts b/core/icons/icon.ts
index 8f8ff70fc32..f5f76603875 100644
--- a/core/icons/icon.ts
+++ b/core/icons/icon.ts
@@ -14,6 +14,7 @@ import * as tooltip from '../tooltip.js';
 import {Coordinate} from '../utils/coordinate.js';
 import * as dom from '../utils/dom.js';
 import * as idGenerator from '../utils/idgenerator.js';
+import {Rect} from '../utils/rect.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
 import type {WorkspaceSvg} from '../workspace_svg.js';
@@ -168,7 +169,16 @@ export abstract class Icon implements IIcon {
   }
 
   /** See IFocusableNode.onNodeFocus. */
-  onNodeFocus(): void {}
+  onNodeFocus(): void {
+    const blockBounds = (this.sourceBlock as BlockSvg).getBoundingRectangle();
+    const bounds = new Rect(
+      blockBounds.top + this.offsetInBlock.y,
+      blockBounds.top + this.offsetInBlock.y + this.getSize().height,
+      blockBounds.left + this.offsetInBlock.x,
+      blockBounds.left + this.offsetInBlock.x + this.getSize().width,
+    );
+    (this.sourceBlock as BlockSvg).workspace.scrollBoundsIntoView(bounds);
+  }
 
   /** See IFocusableNode.onNodeBlur. */
   onNodeBlur(): void {}
diff --git a/core/keyboard_nav/line_cursor.ts b/core/keyboard_nav/line_cursor.ts
index 13e5a729d0f..30770e47d2d 100644
--- a/core/keyboard_nav/line_cursor.ts
+++ b/core/keyboard_nav/line_cursor.ts
@@ -14,14 +14,11 @@
  */
 
 import {BlockSvg} from '../block_svg.js';
-import {CommentBarButton} from '../comments/comment_bar_button.js';
 import {RenderedWorkspaceComment} from '../comments/rendered_workspace_comment.js';
-import {Field} from '../field.js';
 import {getFocusManager} from '../focus_manager.js';
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import * as registry from '../registry.js';
-import {Rect} from '../utils/rect.js';
-import {WorkspaceSvg} from '../workspace_svg.js';
+import type {WorkspaceSvg} from '../workspace_svg.js';
 import {Marker} from './marker.js';
 
 /**
@@ -392,31 +389,6 @@ export class LineCursor extends Marker {
    */
   setCurNode(newNode: IFocusableNode) {
     getFocusManager().focusNode(newNode);
-
-    // Try to scroll cursor into view.
-    if (newNode instanceof BlockSvg) {
-      newNode.workspace.scrollBoundsIntoView(
-        newNode.getBoundingRectangleWithoutChildren(),
-      );
-    } else if (newNode instanceof Field) {
-      const block = newNode.getSourceBlock() as BlockSvg;
-      block.workspace.scrollBoundsIntoView(
-        block.getBoundingRectangleWithoutChildren(),
-      );
-    } else if (newNode instanceof RenderedWorkspaceComment) {
-      newNode.workspace.scrollBoundsIntoView(newNode.getBoundingRectangle());
-    } else if (newNode instanceof CommentBarButton) {
-      const commentView = newNode.getCommentView();
-      const xy = commentView.getRelativeToSurfaceXY();
-      const size = commentView.getSize();
-      const bounds = new Rect(
-        xy.y,
-        xy.y + size.height,
-        xy.x,
-        xy.x + size.width,
-      );
-      commentView.workspace.scrollBoundsIntoView(bounds);
-    }
   }
 
   /**
diff --git a/core/rendered_connection.ts b/core/rendered_connection.ts
index 84905eeccc2..4a53048bc84 100644
--- a/core/rendered_connection.ts
+++ b/core/rendered_connection.ts
@@ -644,6 +644,9 @@ export class RenderedConnection
   /** See IFocusableNode.onNodeFocus. */
   onNodeFocus(): void {
     this.highlight();
+    this.getSourceBlock().workspace.scrollBoundsIntoView(
+      this.getSourceBlock().getBoundingRectangleWithoutChildren(),
+    );
   }
 
   /** See IFocusableNode.onNodeBlur. */
@@ -656,12 +659,12 @@ export class RenderedConnection
     return true;
   }
 
-  private findHighlightSvg(): SVGElement | null {
+  private findHighlightSvg(): SVGPathElement | null {
     // This cast is valid as TypeScript's definition is wrong. See:
     // https://github.com/microsoft/TypeScript/issues/60996.
     return document.getElementById(this.id) as
       | unknown
-      | null as SVGElement | null;
+      | null as SVGPathElement | null;
   }
 }
 
diff --git a/tests/browser/test/basic_playground_test.mjs b/tests/browser/test/basic_playground_test.mjs
index c7c8a5a370c..72b3894a6a3 100644
--- a/tests/browser/test/basic_playground_test.mjs
+++ b/tests/browser/test/basic_playground_test.mjs
@@ -238,3 +238,224 @@ suite('Disabling', function () {
     },
   );
 });
+
+suite('Focused nodes are scrolled into bounds', function () {
+  // Setting timeout to unlimited as the webdriver takes a longer time to run
+  // than most mocha tests.
+  this.timeout(0);
+
+  // Setup Selenium for all of the tests
+  suiteSetup(async function () {
+    this.browser = await testSetup(testFileLocations.PLAYGROUND);
+    await this.browser.execute(() => {
+      window.focusScrollTest = async (testcase) => {
+        const workspace = Blockly.getMainWorkspace();
+        const metrics = workspace.getMetricsManager();
+        const initialViewport = metrics.getViewMetrics(true);
+        const elementBounds = await testcase(workspace);
+        await Blockly.renderManagement.finishQueuedRenders();
+        const scrolledViewport = metrics.getViewMetrics(true);
+        const workspaceBounds = new Blockly.utils.Rect(
+          scrolledViewport.top,
+          scrolledViewport.top + scrolledViewport.height,
+          scrolledViewport.left,
+          scrolledViewport.left + scrolledViewport.width,
+        );
+        return {
+          changed:
+            JSON.stringify(initialViewport) !==
+            JSON.stringify(scrolledViewport),
+          intersects: elementBounds.intersects(workspaceBounds),
+          contains: workspaceBounds.contains(
+            elementBounds.getOrigin().x,
+            elementBounds.getOrigin().y,
+          ),
+          elementBounds,
+          workspaceBounds,
+        };
+      };
+    });
+  });
+
+  setup(async function () {
+    await this.browser.execute(() => {
+      Blockly.serialization.blocks.append(
+        {
+          'type': 'text',
+          'x': -500,
+          'y': -500,
+        },
+        Blockly.getMainWorkspace(),
+      );
+      Blockly.serialization.blocks.append(
+        {
+          'type': 'controls_if',
+          'x': 500,
+          'y': 500,
+        },
+        Blockly.getMainWorkspace(),
+      );
+      Blockly.getMainWorkspace().zoomCenter(1);
+    });
+  });
+
+  test('Focused blocks scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        Blockly.getFocusManager().focusNode(block);
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Focused bubbles scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        block.setCommentText('hello world');
+        const icon = block.getIcon(Blockly.icons.IconType.COMMENT);
+        icon.setBubbleVisible(true);
+        await Blockly.renderManagement.finishQueuedRenders();
+        icon.setBubbleLocation(new Blockly.utils.Coordinate(-510, -510));
+        Blockly.getFocusManager().focusNode(icon.getBubble());
+        const xy = icon.getBubble().getRelativeToSurfaceXY();
+        const size = icon.getBubble().getSize();
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Comment bar buttons scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-300, 500));
+        const commentBarButton = comment.view.getCommentBarButtons()[0];
+        Blockly.getFocusManager().focusNode(commentBarButton);
+        const xy = comment.view.getRelativeToSurfaceXY();
+        const size = comment.view.getSize();
+        // Comment bar buttons scroll their parent comment view into view.
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Comment editors scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-300, 500));
+        const commentEditor = comment.view.getEditorFocusableNode();
+        Blockly.getFocusManager().focusNode(commentEditor);
+        // Comment editor bounds can't be calculated externally since they
+        // depend on private properties, but the comment view is a reasonable
+        // proxy.
+        const xy = comment.view.getRelativeToSurfaceXY();
+        const size = comment.view.getSize();
+        return new Blockly.utils.Rect(
+          xy.y,
+          xy.y + size.height,
+          xy.x,
+          xy.x + size.width,
+        );
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Workspace comments scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const comment = new Blockly.comments.RenderedWorkspaceComment(
+          workspace,
+        );
+        comment.moveTo(new Blockly.utils.Coordinate(-500, 500));
+        Blockly.getFocusManager().focusNode(comment);
+        return comment.getBoundingRectangle();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Icons scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        block.setWarningText('this is bad');
+        const icon = block.getIcon(Blockly.icons.IconType.WARNING);
+        Blockly.getFocusManager().focusNode(icon);
+        // Icon bounds can't be calculated externally since they depend on
+        // protected properties, but the parent block is a reasonable proxy.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Fields scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getTopBlocks()[0];
+        const field = block.getField('TEXT');
+        Blockly.getFocusManager().focusNode(field);
+        // Fields scroll their source block into view.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+
+  test('Connections scroll into bounds', async function () {
+    const result = await this.browser.execute(async () => {
+      return await window.focusScrollTest(async (workspace) => {
+        const block = workspace.getBlocksByType('controls_if')[0];
+        Blockly.getFocusManager().focusNode(block.nextConnection);
+        // Connection bounds can't be calculated externally since they depend on
+        // protected properties, but the parent block is a reasonable proxy.
+        return block.getBoundingRectangleWithoutChildren();
+      });
+    });
+
+    chai.assert.isTrue(result.intersects);
+    chai.assert.isTrue(result.contains);
+    chai.assert.isTrue(result.changed);
+  });
+});

From 5f21e9b15430c43dad8e139c7c09a0ff2537329d Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Thu, 28 Aug 2025 15:46:39 -0700
Subject: [PATCH 48/52] release: Update version number to 12.3.0

---
 package-lock.json | 4 ++--
 package.json      | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 08c105c6980..afd057ce613 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "blockly",
-  "version": "12.3.0-beta.0",
+  "version": "12.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "blockly",
-      "version": "12.3.0-beta.0",
+      "version": "12.3.0",
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
diff --git a/package.json b/package.json
index 9ba8ebe6142..7b639a872ea 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "blockly",
-  "version": "12.3.0-beta.0",
+  "version": "12.3.0",
   "description": "Blockly is a library for building visual programming editors.",
   "keywords": [
     "blockly"

From 9b60088d4bcd5048aacfefa46ccabef99bf5d77b Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Tue, 2 Sep 2025 12:39:16 -0700
Subject: [PATCH 49/52] fix: Fix bug that could caused variable map to be left
 in an inconsistent state. (#9339)

---
 core/variable_map.ts             | 6 +++++-
 tests/mocha/variable_map_test.js | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/core/variable_map.ts b/core/variable_map.ts
index ba36dcea600..3a6cf402681 100644
--- a/core/variable_map.ts
+++ b/core/variable_map.ts
@@ -112,7 +112,11 @@ export class VariableMap
     const oldType = variable.getType();
     if (oldType === newType) return variable;
 
-    this.variableMap.get(variable.getType())?.delete(variable.getId());
+    const oldTypeVariables = this.variableMap.get(oldType);
+    oldTypeVariables?.delete(variable.getId());
+    if (oldTypeVariables?.size === 0) {
+      this.variableMap.delete(oldType);
+    }
     variable.setType(newType);
     const newTypeVariables =
       this.variableMap.get(newType) ??
diff --git a/tests/mocha/variable_map_test.js b/tests/mocha/variable_map_test.js
index 76dffbe9dc7..b0ceec28e4c 100644
--- a/tests/mocha/variable_map_test.js
+++ b/tests/mocha/variable_map_test.js
@@ -258,6 +258,13 @@ suite('Variable Map', function () {
         assert.deepEqual(newTypeVariables, [variable]);
         assert.equal(variable.getType(), '');
       });
+
+      test('removes the type from the map when the last instance is changed', function () {
+        const var1 = this.variableMap.createVariable('name1', 'type1');
+        const var2 = this.variableMap.createVariable('name2', 'type2');
+        this.variableMap.changeVariableType(var1, 'type2');
+        assert.deepEqual(this.variableMap.getTypes(), ['type2']);
+      });
     },
   );
 

From 10e6df32ed32108d5401f58b79a47bda251e1cd8 Mon Sep 17 00:00:00 2001
From: Aaron Dodson <adodson@google.com>
Date: Fri, 5 Sep 2025 11:07:35 -0700
Subject: [PATCH 50/52] fix: Allow cross origin requests for Blockly assets.
 (#9342)

---
 appengine/app.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/appengine/app.yaml b/appengine/app.yaml
index 9c93fb6873d..563af8b24d0 100644
--- a/appengine/app.yaml
+++ b/appengine/app.yaml
@@ -70,6 +70,8 @@ handlers:
 # Blockly files.
 - url: /static
   static_dir: static
+  http_headers:
+    Access-Control-Allow-Origin: "*"
   secure: always
 
 # Storage API.

From 0a4bb5c33fc516bf8b33714ed72877f3cfebf61b Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 8 Sep 2025 09:09:07 +0000
Subject: [PATCH 51/52] chore(deps): bump prettier-plugin-organize-imports from
 4.1.0 to 4.2.0

Bumps [prettier-plugin-organize-imports](https://github.com/simonhaenisch/prettier-plugin-organize-imports) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/simonhaenisch/prettier-plugin-organize-imports/releases)
- [Changelog](https://github.com/simonhaenisch/prettier-plugin-organize-imports/blob/master/changelog.md)
- [Commits](https://github.com/simonhaenisch/prettier-plugin-organize-imports/compare/v4.1.0...v4.2.0)

---
updated-dependencies:
- dependency-name: prettier-plugin-organize-imports
  dependency-version: 4.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 package-lock.json | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index afd057ce613..8b80ff60ba1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7858,14 +7858,15 @@
       }
     },
     "node_modules/prettier-plugin-organize-imports": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/prettier-plugin-organize-imports/-/prettier-plugin-organize-imports-4.1.0.tgz",
-      "integrity": "sha512-5aWRdCgv645xaa58X8lOxzZoiHAldAPChljr/MT0crXVOWTZ+Svl4hIWlz+niYSlO6ikE5UXkN1JrRvIP2ut0A==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/prettier-plugin-organize-imports/-/prettier-plugin-organize-imports-4.2.0.tgz",
+      "integrity": "sha512-Zdy27UhlmyvATZi67BTnLcKTo8fm6Oik59Sz6H64PgZJVs6NJpPD1mT240mmJn62c98/QaL+r3kx9Q3gRpDajg==",
       "dev": true,
+      "license": "MIT",
       "peerDependencies": {
         "prettier": ">=2.0",
         "typescript": ">=2.9",
-        "vue-tsc": "^2.1.0"
+        "vue-tsc": "^2.1.0 || 3"
       },
       "peerDependenciesMeta": {
         "vue-tsc": {

From 2c46686d7d8149c034f75f242d5b8c2e009725db Mon Sep 17 00:00:00 2001
From: Maribeth Moffatt <maribethb@google.com>
Date: Tue, 9 Sep 2025 09:19:17 -0700
Subject: [PATCH 52/52] fix: minor fixes to translation files (#9350)

---
 msg/json/constants.json | 15 ++++++++-------
 msg/json/en.json        |  2 +-
 msg/json/synonyms.json  |  4 ++--
 msg/messages.js         |  4 ++--
 4 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/msg/json/constants.json b/msg/json/constants.json
index ede1c1b75c2..2677e406f74 100644
--- a/msg/json/constants.json
+++ b/msg/json/constants.json
@@ -1,11 +1,12 @@
 {
-  "MATH_HUE": "230",
-  "LOOPS_HUE": "120",
+  "#": "Automatically generated, do not edit this file!",
+  "COLOUR_HUE": "20",
   "LISTS_HUE": "260",
   "LOGIC_HUE": "210",
-  "VARIABLES_HUE": "330",
-  "TEXTS_HUE": "160",
+  "LOOPS_HUE": "120",
+  "MATH_HUE": "230",
   "PROCEDURES_HUE": "290",
-  "COLOUR_HUE": "20",
-  "VARIABLES_DYNAMIC_HUE": "310"
-}
+  "TEXTS_HUE": "160",
+  "VARIABLES_DYNAMIC_HUE": "310",
+  "VARIABLES_HUE": "330"
+}
\ No newline at end of file
diff --git a/msg/json/en.json b/msg/json/en.json
index 5494d7fb09f..ec5862ae465 100644
--- a/msg/json/en.json
+++ b/msg/json/en.json
@@ -1,7 +1,7 @@
 {
 	"@metadata": {
 		"author": "Ellen Spertus <ellen.spertus@gmail.com>",
-		"lastupdated": "2025-06-17 15:36:41.845826",
+		"lastupdated": "2025-09-08 16:26:57.642330",
 		"locale": "en",
 		"messagedocumentation" : "qqq"
 	},
diff --git a/msg/json/synonyms.json b/msg/json/synonyms.json
index 1af8184700d..9fc089ebea7 100644
--- a/msg/json/synonyms.json
+++ b/msg/json/synonyms.json
@@ -1,4 +1,5 @@
 {
+  "#": "Automatically generated, do not edit this file!",
   "CONTROLS_FOREACH_INPUT_DO": "CONTROLS_REPEAT_INPUT_DO",
   "CONTROLS_FOR_INPUT_DO": "CONTROLS_REPEAT_INPUT_DO",
   "CONTROLS_IF_ELSEIF_TITLE_ELSEIF": "CONTROLS_IF_MSG_ELSEIF",
@@ -7,7 +8,6 @@
   "CONTROLS_IF_MSG_THEN": "CONTROLS_REPEAT_INPUT_DO",
   "CONTROLS_WHILEUNTIL_INPUT_DO": "CONTROLS_REPEAT_INPUT_DO",
   "LISTS_CREATE_WITH_ITEM_TITLE": "VARIABLES_DEFAULT_NAME",
-  "LISTS_GET_INDEX_HELPURL": "LISTS_INDEX_OF_HELPURL",
   "LISTS_GET_INDEX_INPUT_IN_LIST": "LISTS_INLIST",
   "LISTS_GET_SUBLIST_INPUT_IN_LIST": "LISTS_INLIST",
   "LISTS_INDEX_OF_INPUT_IN_LIST": "LISTS_INLIST",
@@ -19,4 +19,4 @@
   "PROCEDURES_DEFRETURN_TITLE": "PROCEDURES_DEFNORETURN_TITLE",
   "TEXT_APPEND_VARIABLE": "VARIABLES_DEFAULT_NAME",
   "TEXT_CREATE_JOIN_ITEM_TITLE_ITEM": "VARIABLES_DEFAULT_NAME"
-}
+}
\ No newline at end of file
diff --git a/msg/messages.js b/msg/messages.js
index b7611b4849b..1095ae05776 100644
--- a/msg/messages.js
+++ b/msg/messages.js
@@ -85,10 +85,10 @@ Blockly.Msg.REMOVE_COMMENT = 'Remove Comment';
 /// context menu - Make a copy of the selected workspace comment.\n{{Identical|Duplicate}}
 Blockly.Msg.DUPLICATE_COMMENT = 'Duplicate Comment';
 /** @type {string} */
-/// context menu - Change from 'external' to 'inline' mode for displaying blocks used as inputs to the selected block.  See [[Translating:Blockly#context_menus]].
+/// context menu - Change from 'external' to 'inline' mode for displaying blocks used as inputs to the selected block.  See [[Translating:Blockly#context_menus]].\n\nThe opposite of {{msg-blockly|INLINE INPUTS}}.
 Blockly.Msg.EXTERNAL_INPUTS = 'External Inputs';
 /** @type {string} */
-/// context menu - Change from 'internal' to 'external' mode for displaying blocks used as inputs to the selected block.  See [[Translating:Blockly#context_menus]].
+/// context menu - Change from 'internal' to 'external' mode for displaying blocks used as inputs to the selected block.  See [[Translating:Blockly#context_menus]].\n\nThe opposite of {{msg-blockly|EXTERNAL INPUTS}}.
 Blockly.Msg.INLINE_INPUTS = 'Inline Inputs';
 /** @type {string} */
 /// context menu - Permanently delete the selected block.