simplify the code

Author: gfx

src/utils/utf8-wasm.ts

@@ -11,26 +11,20 @@
 
 import { wasmBinary } from "./utf8-wasm-binary.ts";
 
-// Check environment variable for wasm mode
-declare const process: { env?: Record<string, string | undefined> } | undefined;
-
 function getWasmMode(): "force" | "never" | "auto" {
-  try {
-    if (process?.env) {
-      const mode = process.env["MSGPACK_WASM"];
-      if (mode) {
-        switch (mode.toLowerCase()) {
-          case "force":
-            return "force";
-          case "never":
-            return "never";
-          default:
-            return "auto";
-        }
+  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+  if (typeof process !== "undefined" && process.env) {
+    const mode = process.env["MSGPACK_WASM"];
+    if (mode) {
+      switch (mode.toLowerCase()) {
+        case "force":
+          return "force";
+        case "never":
+          return "never";
+        default:
+          return "auto";
       }
     }
-  } catch {
-    // process may not be defined in browser
   }
   return "auto";
 }
@@ -53,16 +47,22 @@ let wasmInstance: WasmExports | null = null;
 let wasmInitError: Error | null = null;
 
 function base64ToBytes(base64: string): Uint8Array {
-  if (typeof atob === "function") {
+  // @ts-expect-error - fromBase64 is not yet supported in TypeScript
+  if (Uint8Array.fromBase64) {
+    // @ts-expect-error - fromBase64 is not yet supported in TypeScript
+    return Uint8Array.fromBase64(base64);
+  } else if (typeof Buffer !== "undefined") {
+    // Node.js
+    return new Uint8Array(Buffer.from(base64, "base64"));
+  } else {
+    // Legacy fallback
     const binary = atob(base64);
     const bytes = new Uint8Array(binary.length);
     for (let i = 0; i < binary.length; i++) {
       bytes[i] = binary.charCodeAt(i);
     }
     return bytes;
   }
-  // Node.js fallback
-  return new Uint8Array(Buffer.from(base64, "base64"));
 }
 
 function tryInitializeWasmInstance(): void {

tsconfig.json

@@ -1,75 +1,78 @@
 {
   "compilerOptions": {
     /* Basic Options */
-    "target": "ES2020", /* the baseline */
-    "module": "CommonJS",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "lib": ["ES2024", "DOM"],                             /* Specify library files to be included in the compilation. */
+    "target": "es2020", /* the baseline */
+    "module": "CommonJS", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "lib": [
+      "esnext",
+      "dom"
+    ], /* Specify library files to be included in the compilation. */
     // "allowJs": true,                       /* Allow javascript files to be compiled. */
     // "checkJs": true,                       /* Report errors in .js files. */
     // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
     // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
     // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    "sourceMap": true, /* Generates corresponding '.map' file. */
     // "outFile": "./",                       /* Concatenate and emit output to single file. */
-    "outDir": "./build",                        /* Redirect output structure to the directory. */
+    "outDir": "./build", /* Redirect output structure to the directory. */
     // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     // "composite": true,                     /* Enable project compilation */
-    "incremental": true,                   /* Enable incremental compilation */
+    "incremental": true, /* Enable incremental compilation */
     // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
     // "removeComments": true,                /* Do not emit comments to output. */
     // "noEmit": true,                        /* Do not emit outputs. */
-    "importHelpers": false,                 /* Import emit helpers from 'tslib'. */
+    "importHelpers": false, /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-
     /* Strict Type-Checking Options */
-    "strict": true,                           /* Enable all strict type-checking options. */
+    "strict": true, /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
     // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
     // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-
     /* Additional Checks */
     // "noUnusedLocals": true,                /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
-    "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+    "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
+    "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
     "noUncheckedIndexedAccess": true,
     "noPropertyAccessFromIndexSignature": true,
     "noImplicitOverride": true,
     "verbatimModuleSyntax": false,
     "allowImportingTsExtensions": true,
     "noEmit": true,
-
     /* Module Resolution Options */
-    "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "paths": {
     //   "@msgpack/msgpack": ["./src"]
     // },                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true,                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
     "resolveJsonModule": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true
-
     // "erasableSyntaxOnly": true
-
     /* Source Map Options */
     // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
     // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-
     /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   },
-  "exclude": ["example", "benchmark", "test/bun*", "test/deno*", "mod.ts"]
+  "exclude": [
+    "example",
+    "benchmark",
+    "test/bun*",
+    "test/deno*",
+    "mod.ts"
+  ]
 }