Function delayChangeDetectionForEvents

packages/core/src/zone/ng_zone.ts:387–424

(zone: NgZonePrivate)

}

function delayChangeDetectionForEvents(zone: NgZonePrivate) {
  /**
   * We also need to check _nesting here
   * Consider the following case with shouldCoalesceRunChangeDetection = true
   *
   * ngZone.run(() => {});
   * ngZone.run(() => {});
   *
   * We want the two `ngZone.run()` only trigger one change detection
   * when shouldCoalesceRunChangeDetection is true.
   * And because in this case, change detection run in async way(requestAnimationFrame),
   * so we also need to check the _nesting here to prevent multiple
   * change detections.
   */
  if (zone.isCheckStableRunning || zone.callbackScheduled) {
    return;
  }
  zone.callbackScheduled = true;
  function scheduleCheckStable() {
    scheduleCallbackWithRafRace(() => {
      zone.callbackScheduled = false;
      updateMicroTaskStatus(zone);
      zone.isCheckStableRunning = true;
      checkStable(zone);
      zone.isCheckStableRunning = false;
    });
  }
  if (zone.scheduleInRootZone) {
    Zone.root.run(() => {
      scheduleCheckStable();
    });
  } else {
    zone._outer.run(() => {
      scheduleCheckStable();
    });
  }
  updateMicroTaskStatus(zone);
}

function forkInnerZoneWithAngularBehavior(zone: NgZonePrivate) {
  const delayChangeDetectionForEventsDelegate = () => {