| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| type WindowWithExtras = Window&(typeof globalThis)&{ |
| __proto__: any, |
| webkitMessageHandler: any, |
| }; |
| |
| /** |
| * Injects a proxy object that captures calls to window.webkit.messageHandlers |
| * and forwards them to window.webkitMessageHandler. |
| */ |
| (window as WindowWithExtras).__proto__.webkit = {}; |
| (window as WindowWithExtras).__proto__.webkit.messageHandlers = |
| new Proxy((window as WindowWithExtras).webkitMessageHandler, { |
| get(target, property) { |
| return { |
| 'postMessage': function(message: object|string) { |
| const payload = {'handler_name': property, 'message': message}; |
| target.postMessage(JSON.stringify(payload)); |
| }, |
| }; |
| }, |
| }); |
