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diff --git a/remote/test/puppeteer/src/common/Dialog.ts b/remote/test/puppeteer/src/common/Dialog.ts
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+++ b/remote/test/puppeteer/src/common/Dialog.ts
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+/**
+ * Copyright 2017 Google Inc. All rights reserved.
+ *
+ * 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.
+ */
+
+import { assert } from './assert.js';
+import { CDPSession } from './Connection.js';
+import { Protocol } from 'devtools-protocol';
+
+/**
+ * Dialog instances are dispatched by the {@link Page} via the `dialog` event.
+ *
+ * @remarks
+ *
+ * @example
+ * ```js
+ * const puppeteer = require('puppeteer');
+ *
+ * (async () => {
+ *   const browser = await puppeteer.launch();
+ *   const page = await browser.newPage();
+ *   page.on('dialog', async dialog => {
+ *     console.log(dialog.message());
+ *     await dialog.dismiss();
+ *     await browser.close();
+ *   });
+ *   page.evaluate(() => alert('1'));
+ * })();
+ * ```
+ */
+export class Dialog {
+  private _client: CDPSession;
+  private _type: Protocol.Page.DialogType;
+  private _message: string;
+  private _defaultValue: string;
+  private _handled = false;
+
+  /**
+   * @internal
+   */
+  constructor(
+    client: CDPSession,
+    type: Protocol.Page.DialogType,
+    message: string,
+    defaultValue = ''
+  ) {
+    this._client = client;
+    this._type = type;
+    this._message = message;
+    this._defaultValue = defaultValue;
+  }
+
+  /**
+   * @returns The type of the dialog.
+   */
+  type(): Protocol.Page.DialogType {
+    return this._type;
+  }
+
+  /**
+   * @returns The message displayed in the dialog.
+   */
+  message(): string {
+    return this._message;
+  }
+
+  /**
+   * @returns The default value of the prompt, or an empty string if the dialog
+   * is not a `prompt`.
+   */
+  defaultValue(): string {
+    return this._defaultValue;
+  }
+
+  /**
+   * @param promptText - optional text that will be entered in the dialog
+   * prompt. Has no effect if the dialog's type is not `prompt`.
+   *
+   * @returns A promise that resolves when the dialog has been accepted.
+   */
+  async accept(promptText?: string): Promise<void> {
+    assert(!this._handled, 'Cannot accept dialog which is already handled!');
+    this._handled = true;
+    await this._client.send('Page.handleJavaScriptDialog', {
+      accept: true,
+      promptText: promptText,
+    });
+  }
+
+  /**
+   * @returns A promise which will resolve once the dialog has been dismissed
+   */
+  async dismiss(): Promise<void> {
+    assert(!this._handled, 'Cannot dismiss dialog which is already handled!');
+    this._handled = true;
+    await this._client.send('Page.handleJavaScriptDialog', {
+      accept: false,
+    });
+  }
+}