Function createRootEffect

packages/core/src/render3/reactivity/effect.ts:315–328

(
  fn: (onCleanup: EffectCleanupRegisterFn) => void,
  scheduler: EffectScheduler,
  notifier: ChangeDetectionScheduler,
)

}

export function createRootEffect(
  fn: (onCleanup: EffectCleanupRegisterFn) => void,
  scheduler: EffectScheduler,
  notifier: ChangeDetectionScheduler,
): RootEffectNode {
  const node = Object.create(ROOT_EFFECT_NODE) as RootEffectNode;
  node.fn = createEffectFn(node, fn);
  node.scheduler = scheduler;
  node.notifier = notifier;
  node.zone = typeof Zone !== 'undefined' ? Zone.current : null;
  node.scheduler.add(node);
  node.notifier.notify(NotificationSource.RootEffect);
  return node;
}

function createEffectFn(node: EffectNode, fn: (onCleanup: EffectCleanupRegisterFn) => void) {
  return () => {