Function globalCallback

packages/zone.js/lib/common/events.ts:254–298

(context: unknown, event: Event, isCapture: boolean)

  };

  function globalCallback(context: unknown, event: Event, isCapture: boolean) {
    // https://github.com/angular/zone.js/issues/911, in IE, sometimes
    // event will be undefined, so we need to use window.event
    event = event || _global.event;
    if (!event) {
      return;
    }
    // event.target is needed for Samsung TV and SourceBuffer
    // || global is needed https://github.com/angular/zone.js/issues/190
    const target: any = context || event.target || _global;
    const tasks = target[zoneSymbolEventNames[event.type][isCapture ? TRUE_STR : FALSE_STR]];
    if (tasks) {
      const errors = [];
      // invoke all tasks which attached to current target with given event.type and capture = false
      // for performance concern, if task.length === 1, just invoke
      if (tasks.length === 1) {
        const err = invokeTask(tasks[0], target, event);
        err && errors.push(err);
      } else {
        // https://github.com/angular/zone.js/issues/836
        // copy the tasks array before invoke, to avoid
        // the callback will remove itself or other listener
        const copyTasks = tasks.slice();
        for (let i = 0; i < copyTasks.length; i++) {
          if (event && (event as any)[IMMEDIATE_PROPAGATION_SYMBOL] === true) {
            break;
          }
          const err = invokeTask(copyTasks[i], target, event);
          err && errors.push(err);
        }
      }
      // Since there is only one error, we don't need to schedule microTask
      // to throw the error.
      if (errors.length === 1) {
        throw errors[0];
      } else {
        for (let i = 0; i < errors.length; i++) {
          const err = errors[i];
          api.nativeScheduleMicroTask(() => {
            throw err;
          });
        }
      }
    }
  }

  // global shared zoneAwareCallback to handle all event callback with capture = false
  const globalZoneAwareCallback = function (this: unknown, event: Event) {