Skip to content

fix(runtime): don't overwrite native Event/EventTarget on web #122

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
V3RON merged 2 commits into from
May 18, 2026
Merged

fix(runtime): don't overwrite native Event/EventTarget on web #122

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
b7a0a12
fix(runtime): don't overwrite native Event/EventTarget on web
nachooya May 14, 2026
8a9b0d6
add nx version plan for native event preservation
V3RON May 18, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions .nx/version-plans/version-plan-1779082548000.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
__default__: patch
---

Harness now keeps the browser's native `Event` and `EventTarget` on web, while still applying the shim where React Native needs it, so web users no longer lose native DOM behavior.
15 changes: 12 additions & 3 deletions packages/runtime/src/initialize.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,19 @@ import { getClient } from './client/index.js';
import { disableHMRWhenReady } from './disableHMRWhenReady.js';
import { setupJestMock } from './jest-mock.js';

// Polyfill for EventTarget
// Polyfill for EventTarget on runtimes that don't ship one (RN's JSC).
// Do NOT overwrite when a native ctor already exists (RN Web / browsers):
// Safari's EventTarget.dispatchEvent() does an internal brand check and
// rejects polyfill instances with a TypeError, which breaks any
// DOM-event-driven flow in the page — most visibly DRM (FairPlay) via
// libraries that re-dispatch synthetic `encrypted` events.
const Shim = require('event-target-shim');
globalThis.Event = Shim.Event;
globalThis.EventTarget = Shim.EventTarget;
if (typeof globalThis.Event !== 'function') {
globalThis.Event = Shim.Event;
}
if (typeof globalThis.EventTarget !== 'function') {
globalThis.EventTarget = Shim.EventTarget;
}

// Setup jest mock to warn users about using Jest APIs
setupJestMock();
Expand Down
Loading