larry babby and threejs for glsl

webGl/my-threejs-test/node_modules/@parcel/events/src/Disposable.js

@@ -0,0 +1,52 @@
+// @flow strict-local
+
+import type {IDisposable} from './types';
+
+import invariant from 'assert';
+import {AlreadyDisposedError} from './errors';
+
+type DisposableLike = IDisposable | (() => mixed);
+
+/*
+ * A general-purpose disposable class. It can normalize disposable-like values
+ * (such as single functions or IDisposables), as well as hold multiple
+ * disposable-like values to be disposed of at once.
+ */
+export default class Disposable implements IDisposable {
+  disposed: boolean = false;
+  #disposables /*: ?Set<DisposableLike> */;
+
+  constructor(...disposables: Array<DisposableLike>) {
+    this.#disposables = new Set(disposables);
+  }
+
+  add(...disposables: Array<DisposableLike>): void {
+    if (this.disposed) {
+      throw new AlreadyDisposedError(
+        'Cannot add new disposables after disposable has been disposed',
+      );
+    }
+
+    invariant(this.#disposables != null);
+    for (let disposable of disposables) {
+      this.#disposables.add(disposable);
+    }
+  }
+
+  async dispose(): Promise<void> {
+    if (this.disposed) {
+      return;
+    }
+
+    this.disposed = true;
+
+    invariant(this.#disposables != null);
+    await Promise.all(
+      [...this.#disposables].map(disposable =>
+        typeof disposable === 'function' ? disposable() : disposable.dispose(),
+      ),
+    );
+
+    this.#disposables = null;
+  }
+}