angular-fork-inner-zone.ts

function forkInnerZoneWithAngularBehavior(zone) {
  zone._inner = zone._inner.fork({
    name: 'angular',
    properties: { isAngularZone: true },
    onInvokeTask: (delegate, current, target, task, applyThis, applyArgs) => {
      try {
        onEnter(zone);
        return delegate.invokeTask(target, task, applyThis, applyArgs);
      } finally {
        onLeave(zone);
      }
    },
    onInvoke: (delegate, current, target, callback, applyThis, applyArgs, source) => {
      try {
        onEnter(zone);
        return delegate.invoke(target, callback, applyThis, applyArgs, source);
      } finally {
        onLeave(zone);
      }
    },
    onHasTask: (delegate, current, target, hasTaskState) => {
      delegate.hasTask(target, hasTaskState);
      if (current === target) {
        // We are only interested in hasTask events which originate from our zone
        // (A child hasTask event is not interesting to us)
        if (hasTaskState.change == 'microTask') {
          zone.hasPendingMicrotasks = hasTaskState.microTask;
          checkStable(zone);
        } else if (hasTaskState.change == 'macroTask') {
          zone.hasPendingMacrotasks = hasTaskState.macroTask;
        }
      }
    },
    onHandleError: (delegate, current, target, error) => {
      delegate.handleError(target, error);
      zone.runOutsideAngular(() => zone.onError.emit(error));
      return false;
    }
  });
}