Method runTask

packages/core/src/zone/ng_zone.ts:250–258

* Executes the `fn` function synchronously within the Angular zone as a task and returns value * returned by the function. * * Running functions via `runTask` allows you to reenter Angular zone from a task that was executed * outside of the Angular zone (typically started via {@link #run

(fn: (...args: any[]) => T, applyThis?: any, applyArgs?: any[], name?: string)

   * If a synchronous error happens it will be rethrown and not reported via `onError`.
   */
  runTask<T>(fn: (...args: any[]) => T, applyThis?: any, applyArgs?: any[], name?: string): T {
    const zone = (this as any as NgZonePrivate)._inner;
    const task = zone.scheduleEventTask('NgZoneEvent: ' + name, fn, EMPTY_PAYLOAD, noop, noop);
    try {
      return zone.runTask(task, applyThis, applyArgs);
    } finally {
      zone.cancelTask(task);
    }
  }

  /**
   * Same as `run`, except that synchronous errors are caught and forwarded via `onError` and not