add hw2

node_modules/chromium-bidi/lib/cjs/utils/Deferred.js

@@ -0,0 +1,71 @@
+"use strict";
+/**
+ * Copyright 2022 Google LLC.
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.Deferred = void 0;
+class Deferred {
+    #isFinished = false;
+    #promise;
+    #result;
+    #resolve;
+    #reject;
+    get isFinished() {
+        return this.#isFinished;
+    }
+    get result() {
+        if (!this.#isFinished) {
+            throw new Error('Deferred is not finished yet');
+        }
+        return this.#result;
+    }
+    constructor() {
+        this.#promise = new Promise((resolve, reject) => {
+            this.#resolve = resolve;
+            this.#reject = reject;
+        });
+        // Needed to avoid `Uncaught (in promise)`. The promises returned by `then`
+        // and `catch` will be rejected anyway.
+        this.#promise.catch((_error) => {
+            // Intentionally empty.
+        });
+    }
+    then(onFulfilled, onRejected) {
+        return this.#promise.then(onFulfilled, onRejected);
+    }
+    catch(onRejected) {
+        return this.#promise.catch(onRejected);
+    }
+    resolve(value) {
+        this.#result = value;
+        if (!this.#isFinished) {
+            this.#isFinished = true;
+            this.#resolve(value);
+        }
+    }
+    reject(reason) {
+        if (!this.#isFinished) {
+            this.#isFinished = true;
+            this.#reject(reason);
+        }
+    }
+    finally(onFinally) {
+        return this.#promise.finally(onFinally);
+    }
+    [Symbol.toStringTag] = 'Promise';
+}
+exports.Deferred = Deferred;
+//# sourceMappingURL=Deferred.js.map