Method invokeTask

packages/zone.js/lib/zone-impl.ts:1431–1448

(task: any, target: any, args: any)

    }

    static invokeTask(task: any, target: any, args: any): any {
      if (!task) {
        task = this;
      }
      _numberOfNestedTaskFrames++;
      try {
        task.runCount++;
        return task.zone.runTask(task, target, args);
      } finally {
        try {
          if (_numberOfNestedTaskFrames === 1 && !global[enableNativeMicrotaskDraining]) {
            drainMicroTaskQueueSynchronously();
          }
        } finally {
          _numberOfNestedTaskFrames--;
        }
      }
    }

    get zone(): ZoneImpl {
      return this._zone!;