Function cancelCallback

docs/external/js/react-dom.development.js:11195–11199

(callbackNode)

    return fakeCallbackNode;
  }
  function cancelCallback(callbackNode) {
    if (callbackNode !== fakeCallbackNode) {
      Scheduler_cancelCallback(callbackNode);
    }
  }
  function flushSyncCallbackQueue() {
    if (immediateQueueCallbackNode !== null) {
      var node = immediateQueueCallbackNode;