pre-2.2.8

src/utils/WeakArray.ts

@@ -0,0 +1,18 @@
+export class WeakArray<T extends object> {
+  private weakArray: WeakRef<T>[] = [];
+
+  constructor() {}
+
+  push(obj: T) {
+    this.weakArray.push(new WeakRef(obj));
+  }
+
+  forEach(callback: (obj: T, index: number) => void) {
+    this.weakArray.forEach((ref, index) => {
+      const obj = ref.deref();
+      if (obj) {
+        callback(obj, index);
+      }
+    });
+  }
+}