Fix SharedArrayBuffer conflict in TS < 5.9 and @types/node@25

Author: slowcheetah

packages/core-js-types/src/base/proposals/array-buffer-transfer.d.ts

@@ -25,3 +25,34 @@ interface ArrayBuffer {
    */
   transferToFixedLength(newByteLength?: number): ArrayBuffer;
 }
+
+// Type compatibility hack for AllowSharedBufferSource in TypeScript < 5.9
+interface SharedArrayBuffer {
+  readonly resizable: boolean;
+
+  readonly detached: boolean;
+
+  /**
+   * Creates a new `ArrayBuffer` with the same byte content as this buffer, then detaches this buffer.
+   * @param newByteLength - If provided, specifies the `byteLength` of the new `ArrayBuffer`
+   * @throws RangeError If this `ArrayBuffer` is resizable and newByteLength is greater than the `maxByteLength` of this `ArrayBuffer`
+   * @throws TypeError If this `ArrayBuffer` is already detached, or if it can only be detached by designated operations
+   * @returns A new `ArrayBuffer` object
+   */
+  transfer(newByteLength?: number): ArrayBuffer;
+
+  /**
+   * Creates a new non-resizable `ArrayBuffer` with the same byte content as this buffer, then detaches this buffer.
+   * @param newByteLength - If provided, specifies the `byteLength` of the new `ArrayBuffer`
+   * @throws TypeError If this `ArrayBuffer` is already detached, or if it can only be detached by designated operations
+   * @returns A new `ArrayBuffer` object
+   */
+  transferToFixedLength(newByteLength?: number): ArrayBuffer;
+
+  /**
+   * Resizes the ArrayBuffer to the specified size (in bytes).
+   *
+   * [MDN](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/resize)
+   */
+  resize(newByteLength?: number): void;
+}

tests/type-definitions/runner.mjs

@@ -25,23 +25,25 @@ const TYPE_SCRIPT_VERSIONS = ALL_TESTS ? [
   // '5.2',
 ] : [
   '5.9',
+  '5.7',
   '5.6',
 ];
 
 const ENVIRONMENTS = ALL_TESTS ? [
   null,
-  // '@types/node@25', // fails
+  '@types/node@25',
   '@types/node@24',
   '@types/node@22',
   '@types/node@20',
   '@types/node@18',
   '@types/node@16',
   // '@types/node@15', // fails
-  // '@types/bun@latest', // conflicts with DOM types (TextDecorator, SharedArrayBuffer...)
+  // '@types/bun@latest', // ArrayBuffer.resize signature incorrect. Return type ArrayBuffer instead of void.
   // '@types/deno@latest', // fails
 ] : [
   null,
   '@types/node@24',
+  '@types/node@25',
 ];
 
 const CORE_JS_MODES = [