Method onCancelTask

packages/zone.js/lib/zone-spec/proxy.ts:243–258

(
    parentZoneDelegate: ZoneDelegate,
    currentZone: Zone,
    targetZone: Zone,
    task: Task,
  )

  }

  onCancelTask(
    parentZoneDelegate: ZoneDelegate,
    currentZone: Zone,
    targetZone: Zone,
    task: Task,
  ): any {
    if (task.type !== 'eventTask') {
      this.removeFromTasks(task);
    }
    this.tryTriggerHasTask(parentZoneDelegate, currentZone, targetZone);
    if (this._delegateSpec && this._delegateSpec.onCancelTask) {
      return this._delegateSpec.onCancelTask(parentZoneDelegate, currentZone, targetZone, task);
    } else {
      return parentZoneDelegate.cancelTask(targetZone, task);
    }
  }

  onHasTask(delegate: ZoneDelegate, current: Zone, target: Zone, hasTaskState: HasTaskState): void {
    this.lastTaskState = hasTaskState;