Latest updates from IceHrmPro

web/node_modules/scheduler/cjs/scheduler.development.js

@@ -0,0 +1,858 @@
+/** @license React v0.19.1
+ * scheduler.development.js
+ *
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+
+
+if (process.env.NODE_ENV !== "production") {
+  (function() {
+'use strict';
+
+var enableSchedulerDebugging = false;
+var enableProfiling = true;
+
+var requestHostCallback;
+var requestHostTimeout;
+var cancelHostTimeout;
+var shouldYieldToHost;
+var requestPaint;
+
+if ( // If Scheduler runs in a non-DOM environment, it falls back to a naive
+// implementation using setTimeout.
+typeof window === 'undefined' || // Check if MessageChannel is supported, too.
+typeof MessageChannel !== 'function') {
+  // If this accidentally gets imported in a non-browser environment, e.g. JavaScriptCore,
+  // fallback to a naive implementation.
+  var _callback = null;
+  var _timeoutID = null;
+
+  var _flushCallback = function () {
+    if (_callback !== null) {
+      try {
+        var currentTime = exports.unstable_now();
+        var hasRemainingTime = true;
+
+        _callback(hasRemainingTime, currentTime);
+
+        _callback = null;
+      } catch (e) {
+        setTimeout(_flushCallback, 0);
+        throw e;
+      }
+    }
+  };
+
+  var initialTime = Date.now();
+
+  exports.unstable_now = function () {
+    return Date.now() - initialTime;
+  };
+
+  requestHostCallback = function (cb) {
+    if (_callback !== null) {
+      // Protect against re-entrancy.
+      setTimeout(requestHostCallback, 0, cb);
+    } else {
+      _callback = cb;
+      setTimeout(_flushCallback, 0);
+    }
+  };
+
+  requestHostTimeout = function (cb, ms) {
+    _timeoutID = setTimeout(cb, ms);
+  };
+
+  cancelHostTimeout = function () {
+    clearTimeout(_timeoutID);
+  };
+
+  shouldYieldToHost = function () {
+    return false;
+  };
+
+  requestPaint = exports.unstable_forceFrameRate = function () {};
+} else {
+  // Capture local references to native APIs, in case a polyfill overrides them.
+  var performance = window.performance;
+  var _Date = window.Date;
+  var _setTimeout = window.setTimeout;
+  var _clearTimeout = window.clearTimeout;
+
+  if (typeof console !== 'undefined') {
+    // TODO: Scheduler no longer requires these methods to be polyfilled. But
+    // maybe we want to continue warning if they don't exist, to preserve the
+    // option to rely on it in the future?
+    var requestAnimationFrame = window.requestAnimationFrame;
+    var cancelAnimationFrame = window.cancelAnimationFrame; // TODO: Remove fb.me link
+
+    if (typeof requestAnimationFrame !== 'function') {
+      // Using console['error'] to evade Babel and ESLint
+      console['error']("This browser doesn't support requestAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
+    }
+
+    if (typeof cancelAnimationFrame !== 'function') {
+      // Using console['error'] to evade Babel and ESLint
+      console['error']("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
+    }
+  }
+
+  if (typeof performance === 'object' && typeof performance.now === 'function') {
+    exports.unstable_now = function () {
+      return performance.now();
+    };
+  } else {
+    var _initialTime = _Date.now();
+
+    exports.unstable_now = function () {
+      return _Date.now() - _initialTime;
+    };
+  }
+
+  var isMessageLoopRunning = false;
+  var scheduledHostCallback = null;
+  var taskTimeoutID = -1; // Scheduler periodically yields in case there is other work on the main
+  // thread, like user events. By default, it yields multiple times per frame.
+  // It does not attempt to align with frame boundaries, since most tasks don't
+  // need to be frame aligned; for those that do, use requestAnimationFrame.
+
+  var yieldInterval = 5;
+  var deadline = 0; // TODO: Make this configurable
+
+  {
+    // `isInputPending` is not available. Since we have no way of knowing if
+    // there's pending input, always yield at the end of the frame.
+    shouldYieldToHost = function () {
+      return exports.unstable_now() >= deadline;
+    }; // Since we yield every frame regardless, `requestPaint` has no effect.
+
+
+    requestPaint = function () {};
+  }
+
+  exports.unstable_forceFrameRate = function (fps) {
+    if (fps < 0 || fps > 125) {
+      // Using console['error'] to evade Babel and ESLint
+      console['error']('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing framerates higher than 125 fps is not unsupported');
+      return;
+    }
+
+    if (fps > 0) {
+      yieldInterval = Math.floor(1000 / fps);
+    } else {
+      // reset the framerate
+      yieldInterval = 5;
+    }
+  };
+
+  var performWorkUntilDeadline = function () {
+    if (scheduledHostCallback !== null) {
+      var currentTime = exports.unstable_now(); // Yield after `yieldInterval` ms, regardless of where we are in the vsync
+      // cycle. This means there's always time remaining at the beginning of
+      // the message event.
+
+      deadline = currentTime + yieldInterval;
+      var hasTimeRemaining = true;
+
+      try {
+        var hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);
+
+        if (!hasMoreWork) {
+          isMessageLoopRunning = false;
+          scheduledHostCallback = null;
+        } else {
+          // If there's more work, schedule the next message event at the end
+          // of the preceding one.
+          port.postMessage(null);
+        }
+      } catch (error) {
+        // If a scheduler task throws, exit the current browser task so the
+        // error can be observed.
+        port.postMessage(null);
+        throw error;
+      }
+    } else {
+      isMessageLoopRunning = false;
+    } // Yielding to the browser will give it a chance to paint, so we can
+  };
+
+  var channel = new MessageChannel();
+  var port = channel.port2;
+  channel.port1.onmessage = performWorkUntilDeadline;
+
+  requestHostCallback = function (callback) {
+    scheduledHostCallback = callback;
+
+    if (!isMessageLoopRunning) {
+      isMessageLoopRunning = true;
+      port.postMessage(null);
+    }
+  };
+
+  requestHostTimeout = function (callback, ms) {
+    taskTimeoutID = _setTimeout(function () {
+      callback(exports.unstable_now());
+    }, ms);
+  };
+
+  cancelHostTimeout = function () {
+    _clearTimeout(taskTimeoutID);
+
+    taskTimeoutID = -1;
+  };
+}
+
+function push(heap, node) {
+  var index = heap.length;
+  heap.push(node);
+  siftUp(heap, node, index);
+}
+function peek(heap) {
+  var first = heap[0];
+  return first === undefined ? null : first;
+}
+function pop(heap) {
+  var first = heap[0];
+
+  if (first !== undefined) {
+    var last = heap.pop();
+
+    if (last !== first) {
+      heap[0] = last;
+      siftDown(heap, last, 0);
+    }
+
+    return first;
+  } else {
+    return null;
+  }
+}
+
+function siftUp(heap, node, i) {
+  var index = i;
+
+  while (true) {
+    var parentIndex = index - 1 >>> 1;
+    var parent = heap[parentIndex];
+
+    if (parent !== undefined && compare(parent, node) > 0) {
+      // The parent is larger. Swap positions.
+      heap[parentIndex] = node;
+      heap[index] = parent;
+      index = parentIndex;
+    } else {
+      // The parent is smaller. Exit.
+      return;
+    }
+  }
+}
+
+function siftDown(heap, node, i) {
+  var index = i;
+  var length = heap.length;
+
+  while (index < length) {
+    var leftIndex = (index + 1) * 2 - 1;
+    var left = heap[leftIndex];
+    var rightIndex = leftIndex + 1;
+    var right = heap[rightIndex]; // If the left or right node is smaller, swap with the smaller of those.
+
+    if (left !== undefined && compare(left, node) < 0) {
+      if (right !== undefined && compare(right, left) < 0) {
+        heap[index] = right;
+        heap[rightIndex] = node;
+        index = rightIndex;
+      } else {
+        heap[index] = left;
+        heap[leftIndex] = node;
+        index = leftIndex;
+      }
+    } else if (right !== undefined && compare(right, node) < 0) {
+      heap[index] = right;
+      heap[rightIndex] = node;
+      index = rightIndex;
+    } else {
+      // Neither child is smaller. Exit.
+      return;
+    }
+  }
+}
+
+function compare(a, b) {
+  // Compare sort index first, then task id.
+  var diff = a.sortIndex - b.sortIndex;
+  return diff !== 0 ? diff : a.id - b.id;
+}
+
+// TODO: Use symbols?
+var NoPriority = 0;
+var ImmediatePriority = 1;
+var UserBlockingPriority = 2;
+var NormalPriority = 3;
+var LowPriority = 4;
+var IdlePriority = 5;
+
+var runIdCounter = 0;
+var mainThreadIdCounter = 0;
+var profilingStateSize = 4;
+var sharedProfilingBuffer =  // $FlowFixMe Flow doesn't know about SharedArrayBuffer
+typeof SharedArrayBuffer === 'function' ? new SharedArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT) : // $FlowFixMe Flow doesn't know about ArrayBuffer
+typeof ArrayBuffer === 'function' ? new ArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT) : null // Don't crash the init path on IE9
+;
+var profilingState =  sharedProfilingBuffer !== null ? new Int32Array(sharedProfilingBuffer) : []; // We can't read this but it helps save bytes for null checks
+
+var PRIORITY = 0;
+var CURRENT_TASK_ID = 1;
+var CURRENT_RUN_ID = 2;
+var QUEUE_SIZE = 3;
+
+{
+  profilingState[PRIORITY] = NoPriority; // This is maintained with a counter, because the size of the priority queue
+  // array might include canceled tasks.
+
+  profilingState[QUEUE_SIZE] = 0;
+  profilingState[CURRENT_TASK_ID] = 0;
+} // Bytes per element is 4
+
+
+var INITIAL_EVENT_LOG_SIZE = 131072;
+var MAX_EVENT_LOG_SIZE = 524288; // Equivalent to 2 megabytes
+
+var eventLogSize = 0;
+var eventLogBuffer = null;
+var eventLog = null;
+var eventLogIndex = 0;
+var TaskStartEvent = 1;
+var TaskCompleteEvent = 2;
+var TaskErrorEvent = 3;
+var TaskCancelEvent = 4;
+var TaskRunEvent = 5;
+var TaskYieldEvent = 6;
+var SchedulerSuspendEvent = 7;
+var SchedulerResumeEvent = 8;
+
+function logEvent(entries) {
+  if (eventLog !== null) {
+    var offset = eventLogIndex;
+    eventLogIndex += entries.length;
+
+    if (eventLogIndex + 1 > eventLogSize) {
+      eventLogSize *= 2;
+
+      if (eventLogSize > MAX_EVENT_LOG_SIZE) {
+        // Using console['error'] to evade Babel and ESLint
+        console['error']("Scheduler Profiling: Event log exceeded maximum size. Don't " + 'forget to call `stopLoggingProfilingEvents()`.');
+        stopLoggingProfilingEvents();
+        return;
+      }
+
+      var newEventLog = new Int32Array(eventLogSize * 4);
+      newEventLog.set(eventLog);
+      eventLogBuffer = newEventLog.buffer;
+      eventLog = newEventLog;
+    }
+
+    eventLog.set(entries, offset);
+  }
+}
+
+function startLoggingProfilingEvents() {
+  eventLogSize = INITIAL_EVENT_LOG_SIZE;
+  eventLogBuffer = new ArrayBuffer(eventLogSize * 4);
+  eventLog = new Int32Array(eventLogBuffer);
+  eventLogIndex = 0;
+}
+function stopLoggingProfilingEvents() {
+  var buffer = eventLogBuffer;
+  eventLogSize = 0;
+  eventLogBuffer = null;
+  eventLog = null;
+  eventLogIndex = 0;
+  return buffer;
+}
+function markTaskStart(task, ms) {
+  {
+    profilingState[QUEUE_SIZE]++;
+
+    if (eventLog !== null) {
+      // performance.now returns a float, representing milliseconds. When the
+      // event is logged, it's coerced to an int. Convert to microseconds to
+      // maintain extra degrees of precision.
+      logEvent([TaskStartEvent, ms * 1000, task.id, task.priorityLevel]);
+    }
+  }
+}
+function markTaskCompleted(task, ms) {
+  {
+    profilingState[PRIORITY] = NoPriority;
+    profilingState[CURRENT_TASK_ID] = 0;
+    profilingState[QUEUE_SIZE]--;
+
+    if (eventLog !== null) {
+      logEvent([TaskCompleteEvent, ms * 1000, task.id]);
+    }
+  }
+}
+function markTaskCanceled(task, ms) {
+  {
+    profilingState[QUEUE_SIZE]--;
+
+    if (eventLog !== null) {
+      logEvent([TaskCancelEvent, ms * 1000, task.id]);
+    }
+  }
+}
+function markTaskErrored(task, ms) {
+  {
+    profilingState[PRIORITY] = NoPriority;
+    profilingState[CURRENT_TASK_ID] = 0;
+    profilingState[QUEUE_SIZE]--;
+
+    if (eventLog !== null) {
+      logEvent([TaskErrorEvent, ms * 1000, task.id]);
+    }
+  }
+}
+function markTaskRun(task, ms) {
+  {
+    runIdCounter++;
+    profilingState[PRIORITY] = task.priorityLevel;
+    profilingState[CURRENT_TASK_ID] = task.id;
+    profilingState[CURRENT_RUN_ID] = runIdCounter;
+
+    if (eventLog !== null) {
+      logEvent([TaskRunEvent, ms * 1000, task.id, runIdCounter]);
+    }
+  }
+}
+function markTaskYield(task, ms) {
+  {
+    profilingState[PRIORITY] = NoPriority;
+    profilingState[CURRENT_TASK_ID] = 0;
+    profilingState[CURRENT_RUN_ID] = 0;
+
+    if (eventLog !== null) {
+      logEvent([TaskYieldEvent, ms * 1000, task.id, runIdCounter]);
+    }
+  }
+}
+function markSchedulerSuspended(ms) {
+  {
+    mainThreadIdCounter++;
+
+    if (eventLog !== null) {
+      logEvent([SchedulerSuspendEvent, ms * 1000, mainThreadIdCounter]);
+    }
+  }
+}
+function markSchedulerUnsuspended(ms) {
+  {
+    if (eventLog !== null) {
+      logEvent([SchedulerResumeEvent, ms * 1000, mainThreadIdCounter]);
+    }
+  }
+}
+
+/* eslint-disable no-var */
+// Math.pow(2, 30) - 1
+// 0b111111111111111111111111111111
+
+var maxSigned31BitInt = 1073741823; // Times out immediately
+
+var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out
+
+var USER_BLOCKING_PRIORITY = 250;
+var NORMAL_PRIORITY_TIMEOUT = 5000;
+var LOW_PRIORITY_TIMEOUT = 10000; // Never times out
+
+var IDLE_PRIORITY = maxSigned31BitInt; // Tasks are stored on a min heap
+
+var taskQueue = [];
+var timerQueue = []; // Incrementing id counter. Used to maintain insertion order.
+
+var taskIdCounter = 1; // Pausing the scheduler is useful for debugging.
+var currentTask = null;
+var currentPriorityLevel = NormalPriority; // This is set while performing work, to prevent re-entrancy.
+
+var isPerformingWork = false;
+var isHostCallbackScheduled = false;
+var isHostTimeoutScheduled = false;
+
+function advanceTimers(currentTime) {
+  // Check for tasks that are no longer delayed and add them to the queue.
+  var timer = peek(timerQueue);
+
+  while (timer !== null) {
+    if (timer.callback === null) {
+      // Timer was cancelled.
+      pop(timerQueue);
+    } else if (timer.startTime <= currentTime) {
+      // Timer fired. Transfer to the task queue.
+      pop(timerQueue);
+      timer.sortIndex = timer.expirationTime;
+      push(taskQueue, timer);
+
+      {
+        markTaskStart(timer, currentTime);
+        timer.isQueued = true;
+      }
+    } else {
+      // Remaining timers are pending.
+      return;
+    }
+
+    timer = peek(timerQueue);
+  }
+}
+
+function handleTimeout(currentTime) {
+  isHostTimeoutScheduled = false;
+  advanceTimers(currentTime);
+
+  if (!isHostCallbackScheduled) {
+    if (peek(taskQueue) !== null) {
+      isHostCallbackScheduled = true;
+      requestHostCallback(flushWork);
+    } else {
+      var firstTimer = peek(timerQueue);
+
+      if (firstTimer !== null) {
+        requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
+      }
+    }
+  }
+}
+
+function flushWork(hasTimeRemaining, initialTime) {
+  {
+    markSchedulerUnsuspended(initialTime);
+  } // We'll need a host callback the next time work is scheduled.
+
+
+  isHostCallbackScheduled = false;
+
+  if (isHostTimeoutScheduled) {
+    // We scheduled a timeout but it's no longer needed. Cancel it.
+    isHostTimeoutScheduled = false;
+    cancelHostTimeout();
+  }
+
+  isPerformingWork = true;
+  var previousPriorityLevel = currentPriorityLevel;
+
+  try {
+    if (enableProfiling) {
+      try {
+        return workLoop(hasTimeRemaining, initialTime);
+      } catch (error) {
+        if (currentTask !== null) {
+          var currentTime = exports.unstable_now();
+          markTaskErrored(currentTask, currentTime);
+          currentTask.isQueued = false;
+        }
+
+        throw error;
+      }
+    } else {
+      // No catch in prod codepath.
+      return workLoop(hasTimeRemaining, initialTime);
+    }
+  } finally {
+    currentTask = null;
+    currentPriorityLevel = previousPriorityLevel;
+    isPerformingWork = false;
+
+    {
+      var _currentTime = exports.unstable_now();
+
+      markSchedulerSuspended(_currentTime);
+    }
+  }
+}
+
+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) {
+  switch (priorityLevel) {
+    case ImmediatePriority:
+    case UserBlockingPriority:
+    case NormalPriority:
+    case LowPriority:
+    case IdlePriority:
+      break;
+
+    default:
+      priorityLevel = NormalPriority;
+  }
+
+  var previousPriorityLevel = currentPriorityLevel;
+  currentPriorityLevel = priorityLevel;
+
+  try {
+    return eventHandler();
+  } finally {
+    currentPriorityLevel = previousPriorityLevel;
+  }
+}
+
+function unstable_next(eventHandler) {
+  var priorityLevel;
+
+  switch (currentPriorityLevel) {
+    case ImmediatePriority:
+    case UserBlockingPriority:
+    case NormalPriority:
+      // Shift down to normal priority
+      priorityLevel = NormalPriority;
+      break;
+
+    default:
+      // Anything lower than normal priority should remain at the current level.
+      priorityLevel = currentPriorityLevel;
+      break;
+  }
+
+  var previousPriorityLevel = currentPriorityLevel;
+  currentPriorityLevel = priorityLevel;
+
+  try {
+    return eventHandler();
+  } finally {
+    currentPriorityLevel = previousPriorityLevel;
+  }
+}
+
+function unstable_wrapCallback(callback) {
+  var parentPriorityLevel = currentPriorityLevel;
+  return function () {
+    // This is a fork of runWithPriority, inlined for performance.
+    var previousPriorityLevel = currentPriorityLevel;
+    currentPriorityLevel = parentPriorityLevel;
+
+    try {
+      return callback.apply(this, arguments);
+    } finally {
+      currentPriorityLevel = previousPriorityLevel;
+    }
+  };
+}
+
+function timeoutForPriorityLevel(priorityLevel) {
+  switch (priorityLevel) {
+    case ImmediatePriority:
+      return IMMEDIATE_PRIORITY_TIMEOUT;
+
+    case UserBlockingPriority:
+      return USER_BLOCKING_PRIORITY;
+
+    case IdlePriority:
+      return IDLE_PRIORITY;
+
+    case LowPriority:
+      return LOW_PRIORITY_TIMEOUT;
+
+    case NormalPriority:
+    default:
+      return NORMAL_PRIORITY_TIMEOUT;
+  }
+}
+
+function unstable_scheduleCallback(priorityLevel, callback, options) {
+  var currentTime = exports.unstable_now();
+  var startTime;
+  var timeout;
+
+  if (typeof options === 'object' && options !== null) {
+    var delay = options.delay;
+
+    if (typeof delay === 'number' && delay > 0) {
+      startTime = currentTime + delay;
+    } else {
+      startTime = currentTime;
+    }
+
+    timeout = typeof options.timeout === 'number' ? options.timeout : timeoutForPriorityLevel(priorityLevel);
+  } else {
+    timeout = timeoutForPriorityLevel(priorityLevel);
+    startTime = currentTime;
+  }
+
+  var expirationTime = startTime + timeout;
+  var newTask = {
+    id: taskIdCounter++,
+    callback: callback,
+    priorityLevel: priorityLevel,
+    startTime: startTime,
+    expirationTime: expirationTime,
+    sortIndex: -1
+  };
+
+  {
+    newTask.isQueued = false;
+  }
+
+  if (startTime > currentTime) {
+    // This is a delayed task.
+    newTask.sortIndex = startTime;
+    push(timerQueue, newTask);
+
+    if (peek(taskQueue) === null && newTask === peek(timerQueue)) {
+      // All tasks are delayed, and this is the task with the earliest delay.
+      if (isHostTimeoutScheduled) {
+        // Cancel an existing timeout.
+        cancelHostTimeout();
+      } else {
+        isHostTimeoutScheduled = true;
+      } // Schedule a timeout.
+
+
+      requestHostTimeout(handleTimeout, startTime - currentTime);
+    }
+  } else {
+    newTask.sortIndex = expirationTime;
+    push(taskQueue, newTask);
+
+    {
+      markTaskStart(newTask, currentTime);
+      newTask.isQueued = true;
+    } // Schedule a host callback, if needed. If we're already performing work,
+    // wait until the next time we yield.
+
+
+    if (!isHostCallbackScheduled && !isPerformingWork) {
+      isHostCallbackScheduled = true;
+      requestHostCallback(flushWork);
+    }
+  }
+
+  return newTask;
+}
+
+function unstable_pauseExecution() {
+}
+
+function unstable_continueExecution() {
+
+  if (!isHostCallbackScheduled && !isPerformingWork) {
+    isHostCallbackScheduled = true;
+    requestHostCallback(flushWork);
+  }
+}
+
+function unstable_getFirstCallbackNode() {
+  return peek(taskQueue);
+}
+
+function unstable_cancelCallback(task) {
+  {
+    if (task.isQueued) {
+      var currentTime = exports.unstable_now();
+      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() {
+  return currentPriorityLevel;
+}
+
+function unstable_shouldYield() {
+  var currentTime = exports.unstable_now();
+  advanceTimers(currentTime);
+  var firstTask = peek(taskQueue);
+  return firstTask !== currentTask && currentTask !== null && firstTask !== null && firstTask.callback !== null && firstTask.startTime <= currentTime && firstTask.expirationTime < currentTask.expirationTime || shouldYieldToHost();
+}
+
+var unstable_requestPaint = requestPaint;
+var unstable_Profiling =  {
+  startLoggingProfilingEvents: startLoggingProfilingEvents,
+  stopLoggingProfilingEvents: stopLoggingProfilingEvents,
+  sharedProfilingBuffer: sharedProfilingBuffer
+} ;
+
+exports.unstable_IdlePriority = IdlePriority;
+exports.unstable_ImmediatePriority = ImmediatePriority;
+exports.unstable_LowPriority = LowPriority;
+exports.unstable_NormalPriority = NormalPriority;
+exports.unstable_Profiling = unstable_Profiling;
+exports.unstable_UserBlockingPriority = UserBlockingPriority;
+exports.unstable_cancelCallback = unstable_cancelCallback;
+exports.unstable_continueExecution = unstable_continueExecution;
+exports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
+exports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
+exports.unstable_next = unstable_next;
+exports.unstable_pauseExecution = unstable_pauseExecution;
+exports.unstable_requestPaint = unstable_requestPaint;
+exports.unstable_runWithPriority = unstable_runWithPriority;
+exports.unstable_scheduleCallback = unstable_scheduleCallback;
+exports.unstable_shouldYield = unstable_shouldYield;
+exports.unstable_wrapCallback = unstable_wrapCallback;
+  })();
+}