Function workLoop

lib/assets/react-source/development/react.js:3409–3464

(hasTimeRemaining, initialTime)

	}

	function workLoop(hasTimeRemaining, initialTime) {
	  var currentTime = initialTime;
	  advanceTimers(currentTime);
	  currentTask = peek(taskQueue);

	  while (currentTask !== null && !(enableSchedulerDebugging )) {
	    if (currentTask.expirationTime > currentTime && (!hasTimeRemaining || shouldYieldToHost())) {
	      // This currentTask hasn't expired, and we've reached the deadline.
	      break;
	    }

	    var callback = currentTask.callback;

	    if (callback !== null) {
	      currentTask.callback = null;
	      currentPriorityLevel = currentTask.priorityLevel;
	      var didUserCallbackTimeout = currentTask.expirationTime <= currentTime;
	      markTaskRun(currentTask, currentTime);
	      var continuationCallback = callback(didUserCallbackTimeout);
	      currentTime = exports.unstable_now();

	      if (typeof continuationCallback === 'function') {
	        currentTask.callback = continuationCallback;
	        markTaskYield(currentTask, currentTime);
	      } else {
	        {
	          markTaskCompleted(currentTask, currentTime);
	          currentTask.isQueued = false;
	        }

	        if (currentTask === peek(taskQueue)) {
	          pop(taskQueue);
	        }
	      }

	      advanceTimers(currentTime);
	    } else {
	      pop(taskQueue);
	    }

	    currentTask = peek(taskQueue);
	  } // Return whether there's additional work


	  if (currentTask !== null) {
	    return true;
	  } else {
	    var firstTimer = peek(timerQueue);

	    if (firstTimer !== null) {
	      requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
	    }

	    return false;
	  }
	}

	function unstable_runWithPriority(priorityLevel, eventHandler) {