angular-docs-cn/packages/zone.js/lib/extra/socket-io.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
Zone.__load_patch('socketio', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
  (Zone as any)[Zone.__symbol__('socketio')] = function patchSocketIO(io: any) {
    // patch io.Socket.prototype event listener related method
    api.patchEventTarget(global, [io.Socket.prototype], {
      useG: false,
      chkDup: false,
      rt: true,
      diff: (task: any, delegate: any) => {
        return task.callback === delegate;
      }
    });
    // also patch io.Socket.prototype.on/off/removeListener/removeAllListeners
    io.Socket.prototype.on = io.Socket.prototype.addEventListener;
    io.Socket.prototype.off = io.Socket.prototype.removeListener =
        io.Socket.prototype.removeAllListeners = io.Socket.prototype.removeEventListener;
  };
});