feat: export Frame._client through getter (#8041)

Co-authored-by: Randolf Jung <jrandolf@chromium.org>

src/common/FrameManager.ts

@@ -702,6 +702,11 @@ export class Frame {
     );
   }
 
+  /**
+   * @remarks
+   *
+   * @returns `true` if the frame is an OOP frame, or `false` otherwise.
+   */
   isOOPFrame(): boolean {
     return this._client !== this._frameManager._client;
   }
@@ -785,6 +790,13 @@ export class Frame {
     return await this._frameManager.waitForFrameNavigation(this, options);
   }
 
+  /**
+   * @internal
+   */
+  client(): CDPSession {
+    return this._client;
+  }
+
   /**
    * @returns a promise that resolves to the frame's default execution context.
    */

test/frame.spec.ts

@@ -22,6 +22,7 @@ import {
   setupTestPageAndContextHooks,
   itFailsFirefox,
 } from './mocha-utils'; // eslint-disable-line import/extensions
+import { CDPSession } from '../lib/cjs/puppeteer/common/Connection.js';
 
 describe('Frame specs', function () {
   setupTestBrowserHooks();
@@ -278,4 +279,11 @@ describe('Frame specs', function () {
       );
     });
   });
+
+  describe('Frame.client', function () {
+    it('should return the client instance', async () => {
+      const { page } = getTestState();
+      expect(page.mainFrame().client()).toBeInstanceOf(CDPSession);
+    });
+  });
 });

utils/doclint/check_public_api/index.js

@@ -24,6 +24,7 @@ const {
 
 const EXCLUDE_PROPERTIES = new Set([
   'Browser.create',
+  'Frame.client',
   'Headers.fromPayload',
   'Page.client',
   'Page.create',