Function enqueueUpdate

lib/assets/react-source/development/react.js:15887–15915

(fiber, update)

	  return update;
	}
	function enqueueUpdate(fiber, update) {
	  var updateQueue = fiber.updateQueue;

	  if (updateQueue === null) {
	    // Only occurs if the fiber has been unmounted.
	    return;
	  }

	  var sharedQueue = updateQueue.shared;
	  var pending = sharedQueue.pending;

	  if (pending === null) {
	    // This is the first update. Create a circular list.
	    update.next = update;
	  } else {
	    update.next = pending.next;
	    pending.next = update;
	  }

	  sharedQueue.pending = update;

	  {
	    if (currentlyProcessingQueue === sharedQueue && !didWarnUpdateInsideUpdate) {
	      error('An update (setState, replaceState, or forceUpdate) was scheduled ' + 'from inside an update function. Update functions should be pure, ' + 'with zero side-effects. Consider using componentDidUpdate or a ' + 'callback.');

	      didWarnUpdateInsideUpdate = true;
	    }
	  }
	}
	function enqueueCapturedUpdate(workInProgress, update) {
	  var current = workInProgress.alternate;