Function unstable_cancelCallback

packages/scheduler/src/forks/Scheduler.js:418–431

(task: Task)

}

function unstable_cancelCallback(task: Task) {
  if (enableProfiling) {
    if (task.isQueued) {
      const currentTime = getCurrentTime();
      markTaskCanceled(task, currentTime);
      task.isQueued = false;
    }
  }

  // Null out the callback to indicate the task has been canceled. (Can't
  // remove from the queue because you can't remove arbitrary nodes from an
  // array based heap, only the first one.)
  task.callback = null;
}

function unstable_getCurrentPriorityLevel(): PriorityLevel {
  return currentPriorityLevel;