scheduler - npm Package Compare versions

Comparing version 0.0.0-7325ebe4d to 0.0.0-73e900b0e

cjs/scheduler-tracing.development.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-7325ebe4d
+/** @license React vundefined
  * scheduler-tracing.development.js
@@ -12,4 +12,2 @@ *
 
-
-
 if (process.env.NODE_ENV !== "production") {
@@ -19,58 +17,15 @@ (function() {
 
-Object.defineProperty(exports, '__esModule', { value: true });
+var DEFAULT_THREAD_ID = 0; // Counters used to generate unique IDs.
 
-// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:
-
-
-// In some cases, StrictMode should also double-render lifecycles.
-// This can be confusing for tests though,
-// And it can be bad for performance in production.
-// This feature flag can be used to control the behavior:
-
-
-// To preserve the "Pause on caught exceptions" behavior of the debugger, we
-// replay the begin phase of a failed component inside invokeGuardedCallback.
-
-
-// Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:
-
-
-// Gather advanced timing metrics for Profiler subtrees.
-
-
-// Trace which interactions trigger each commit.
-var enableSchedulerTracing = true;
-
-// Only used in www builds.
- // TODO: true? Here it might just be false.
-
-// Only used in www builds.
-
-
-// Only used in www builds.
-
-
-// React Fire: prevent the value and checked attributes from syncing
-// with their related DOM properties
-
-
-// These APIs will no longer be "unstable" in the upcoming 16.7 release,
-// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.
-
-var DEFAULT_THREAD_ID = 0;
-
-// Counters used to generate unique IDs.
 var interactionIDCounter = 0;
-var threadIDCounter = 0;
-
-// Set of currently traced interactions.
+var threadIDCounter = 0; // Set of currently traced interactions.
 // Interactions "stack"–
 // Meaning that newly traced interactions are appended to the previously active set.
 // When an interaction goes out of scope, the previous set (if any) is restored.
-exports.__interactionsRef = null;
 
-// Listener(s) to notify when interactions begin and end.
+exports.__interactionsRef = null; // Listener(s) to notify when interactions begin and end.
+
 exports.__subscriberRef = null;
 
-if (enableSchedulerTracing) {
+{
   exports.__interactionsRef = {
@@ -83,7 +38,3 @@ current: new Set()
 }
-
 function unstable_clear(callback) {
-  if (!enableSchedulerTracing) {
-    return callback();
-  }
 
@@ -99,22 +50,13 @@ var prevInteractions = exports.__interactionsRef.current;
 }
-
 function unstable_getCurrent() {
-  if (!enableSchedulerTracing) {
-    return null;
-  } else {
+  {
     return exports.__interactionsRef.current;
   }
 }
-
 function unstable_getThreadID() {
   return ++threadIDCounter;
 }
-
 function unstable_trace(name, timestamp, callback) {
   var threadID = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : DEFAULT_THREAD_ID;
 
-  if (!enableSchedulerTracing) {
-    return callback();
-  }
-
   var interaction = {
@@ -126,14 +68,11 @@ __count: 1,
   };
-
-  var prevInteractions = exports.__interactionsRef.current;
-
-  // Traced interactions should stack/accumulate.
+  var prevInteractions = exports.__interactionsRef.current; // Traced interactions should stack/accumulate.
   // To do that, clone the current interactions.
   // The previous set will be restored upon completion.
+
   var interactions = new Set(prevInteractions);
   interactions.add(interaction);
   exports.__interactionsRef.current = interactions;
-
   var subscriber = exports.__subscriberRef.current;
-  var returnValue = void 0;
+  var returnValue;
 
@@ -160,6 +99,5 @@ try {
         } finally {
-          interaction.__count--;
+          interaction.__count--; // If no async work was scheduled for this interaction,
+          // Notify subscribers that it's completed.
 
-          // If no async work was scheduled for this interaction,
-          // Notify subscribers that it's completed.
           if (subscriber !== null && interaction.__count === 0) {
@@ -175,23 +113,17 @@ subscriber.onInteractionScheduledWorkCompleted(interaction);
 }
-
 function unstable_wrap(callback) {
   var threadID = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THREAD_ID;
 
-  if (!enableSchedulerTracing) {
-    return callback;
-  }
-
   var wrappedInteractions = exports.__interactionsRef.current;
+  var subscriber = exports.__subscriberRef.current;
 
-  var subscriber = exports.__subscriberRef.current;
   if (subscriber !== null) {
     subscriber.onWorkScheduled(wrappedInteractions, threadID);
-  }
+  } // Update the pending async work count for the current interactions.
+  // Update after calling subscribers in case of error.
 
-  // Update the pending async work count for the current interactions.
-  // Update after calling subscribers in case of error.
+
   wrappedInteractions.forEach(function (interaction) {
     interaction.__count++;
   });
-
   var hasRun = false;
@@ -202,7 +134,6 @@
     exports.__interactionsRef.current = wrappedInteractions;
-
     subscriber = exports.__subscriberRef.current;
 
     try {
-      var returnValue = void 0;
+      var returnValue;
 
@@ -231,7 +162,6 @@ try {
         // Only decrement the outstanding interaction counts once.
-        hasRun = true;
-
-        // Update pending async counts for all wrapped interactions.
+        hasRun = true; // Update pending async counts for all wrapped interactions.
         // If this was the last scheduled async work for any of them,
         // Mark them as completed.
+
         wrappedInteractions.forEach(function (interaction) {
@@ -273,3 +203,4 @@ interaction.__count--;
 var subscribers = null;
-if (enableSchedulerTracing) {
+
+{
   subscribers = new Set();
@@ -279,3 +210,3 @@ }
 function unstable_subscribe(subscriber) {
-  if (enableSchedulerTracing) {
+  {
     subscribers.add(subscriber);
@@ -295,5 +226,4 @@
 }
-
 function unstable_unsubscribe(subscriber) {
-  if (enableSchedulerTracing) {
+  {
     subscribers.delete(subscriber);
@@ -310,3 +240,2 @@
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -331,3 +260,2 @@ try {
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -352,3 +280,2 @@ try {
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -373,3 +300,2 @@ try {
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -394,3 +320,2 @@ try {
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -415,3 +340,2 @@ try {
   var caughtError = null;
-
   subscribers.forEach(function (subscriber) {
@@ -436,7 +360,7 @@ try {
 exports.unstable_getThreadID = unstable_getThreadID;
+exports.unstable_subscribe = unstable_subscribe;
 exports.unstable_trace = unstable_trace;
+exports.unstable_unsubscribe = unstable_unsubscribe;
 exports.unstable_wrap = unstable_wrap;
-exports.unstable_subscribe = unstable_subscribe;
-exports.unstable_unsubscribe = unstable_unsubscribe;
   })();
 }

cjs/scheduler-tracing.production.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-7325ebe4d
+/** @license React vundefined
  * scheduler-tracing.production.min.js
@@ -9,3 +9,2 @@ *
  */
-
-'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var b=0;exports.__interactionsRef=null;exports.__subscriberRef=null;exports.unstable_clear=function(a){return a()};exports.unstable_getCurrent=function(){return null};exports.unstable_getThreadID=function(){return++b};exports.unstable_trace=function(a,d,c){return c()};exports.unstable_wrap=function(a){return a};exports.unstable_subscribe=function(){};exports.unstable_unsubscribe=function(){};
+'use strict';var b=0;exports.__interactionsRef=null;exports.__subscriberRef=null;exports.unstable_clear=function(a){return a()};exports.unstable_getCurrent=function(){return null};exports.unstable_getThreadID=function(){return++b};exports.unstable_subscribe=function(){};exports.unstable_trace=function(a,d,c){return c()};exports.unstable_unsubscribe=function(){};exports.unstable_wrap=function(a){return a};

cjs/scheduler-tracing.profiling.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-7325ebe4d
+/** @license React vundefined
  * scheduler-tracing.profiling.min.js
@@ -9,10 +9,9 @@ *
  */
-
-'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var g=0,m=0;exports.__interactionsRef=null;exports.__subscriberRef=null;exports.__interactionsRef={current:new Set};exports.__subscriberRef={current:null};var n=null;n=new Set;function p(e){var d=!1,a=null;n.forEach(function(c){try{c.onInteractionTraced(e)}catch(b){d||(d=!0,a=b)}});if(d)throw a;}
-function q(e){var d=!1,a=null;n.forEach(function(c){try{c.onInteractionScheduledWorkCompleted(e)}catch(b){d||(d=!0,a=b)}});if(d)throw a;}function r(e,d){var a=!1,c=null;n.forEach(function(b){try{b.onWorkScheduled(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}function t(e,d){var a=!1,c=null;n.forEach(function(b){try{b.onWorkStarted(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}function u(e,d){var a=!1,c=null;n.forEach(function(b){try{b.onWorkStopped(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}
-function v(e,d){var a=!1,c=null;n.forEach(function(b){try{b.onWorkCanceled(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}exports.unstable_clear=function(e){var d=exports.__interactionsRef.current;exports.__interactionsRef.current=new Set;try{return e()}finally{exports.__interactionsRef.current=d}};exports.unstable_getCurrent=function(){return exports.__interactionsRef.current};exports.unstable_getThreadID=function(){return++m};
-exports.unstable_trace=function(e,d,a){var c=3<arguments.length&&void 0!==arguments[3]?arguments[3]:0,b={__count:1,id:g++,name:e,timestamp:d},f=exports.__interactionsRef.current,k=new Set(f);k.add(b);exports.__interactionsRef.current=k;var h=exports.__subscriberRef.current,l=void 0;try{if(null!==h)h.onInteractionTraced(b)}finally{try{if(null!==h)h.onWorkStarted(k,c)}finally{try{l=a()}finally{exports.__interactionsRef.current=f;try{if(null!==h)h.onWorkStopped(k,c)}finally{if(b.__count--,null!==h&&
-0===b.__count)h.onInteractionScheduledWorkCompleted(b)}}}}return l};
-exports.unstable_wrap=function(e){function d(){var d=exports.__interactionsRef.current;exports.__interactionsRef.current=c;b=exports.__subscriberRef.current;try{var h=void 0;try{if(null!==b)b.onWorkStarted(c,a)}finally{try{h=e.apply(void 0,arguments)}finally{if(exports.__interactionsRef.current=d,null!==b)b.onWorkStopped(c,a)}}return h}finally{f||(f=!0,c.forEach(function(a){a.__count--;if(null!==b&&0===a.__count)b.onInteractionScheduledWorkCompleted(a)}))}}var a=1<arguments.length&&void 0!==arguments[1]?
-arguments[1]:0,c=exports.__interactionsRef.current,b=exports.__subscriberRef.current;if(null!==b)b.onWorkScheduled(c,a);c.forEach(function(a){a.__count++});var f=!1;d.cancel=function(){b=exports.__subscriberRef.current;try{if(null!==b)b.onWorkCanceled(c,a)}finally{c.forEach(function(a){a.__count--;if(b&&0===a.__count)b.onInteractionScheduledWorkCompleted(a)})}};return d};
-exports.unstable_subscribe=function(e){n.add(e);1===n.size&&(exports.__subscriberRef.current={onInteractionScheduledWorkCompleted:q,onInteractionTraced:p,onWorkCanceled:v,onWorkScheduled:r,onWorkStarted:t,onWorkStopped:u})};exports.unstable_unsubscribe=function(e){n.delete(e);0===n.size&&(exports.__subscriberRef.current=null)};
+'use strict';var g=0,l=0;exports.__interactionsRef=null;exports.__subscriberRef=null;exports.__interactionsRef={current:new Set};exports.__subscriberRef={current:null};var m=null;m=new Set;function n(e){var d=!1,a=null;m.forEach(function(c){try{c.onInteractionTraced(e)}catch(b){d||(d=!0,a=b)}});if(d)throw a;}function p(e){var d=!1,a=null;m.forEach(function(c){try{c.onInteractionScheduledWorkCompleted(e)}catch(b){d||(d=!0,a=b)}});if(d)throw a;}
+function q(e,d){var a=!1,c=null;m.forEach(function(b){try{b.onWorkScheduled(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}function r(e,d){var a=!1,c=null;m.forEach(function(b){try{b.onWorkStarted(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}function t(e,d){var a=!1,c=null;m.forEach(function(b){try{b.onWorkStopped(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}function u(e,d){var a=!1,c=null;m.forEach(function(b){try{b.onWorkCanceled(e,d)}catch(f){a||(a=!0,c=f)}});if(a)throw c;}
+exports.unstable_clear=function(e){var d=exports.__interactionsRef.current;exports.__interactionsRef.current=new Set;try{return e()}finally{exports.__interactionsRef.current=d}};exports.unstable_getCurrent=function(){return exports.__interactionsRef.current};exports.unstable_getThreadID=function(){return++l};
+exports.unstable_subscribe=function(e){m.add(e);1===m.size&&(exports.__subscriberRef.current={onInteractionScheduledWorkCompleted:p,onInteractionTraced:n,onWorkCanceled:u,onWorkScheduled:q,onWorkStarted:r,onWorkStopped:t})};
+exports.unstable_trace=function(e,d,a){var c=3<arguments.length&&void 0!==arguments[3]?arguments[3]:0,b={__count:1,id:g++,name:e,timestamp:d},f=exports.__interactionsRef.current,k=new Set(f);k.add(b);exports.__interactionsRef.current=k;var h=exports.__subscriberRef.current;try{if(null!==h)h.onInteractionTraced(b)}finally{try{if(null!==h)h.onWorkStarted(k,c)}finally{try{var v=a()}finally{exports.__interactionsRef.current=f;try{if(null!==h)h.onWorkStopped(k,c)}finally{if(b.__count--,null!==h&&0===b.__count)h.onInteractionScheduledWorkCompleted(b)}}}}return v};
+exports.unstable_unsubscribe=function(e){m.delete(e);0===m.size&&(exports.__subscriberRef.current=null)};
+exports.unstable_wrap=function(e){function d(){var d=exports.__interactionsRef.current;exports.__interactionsRef.current=c;b=exports.__subscriberRef.current;try{try{if(null!==b)b.onWorkStarted(c,a)}finally{try{var h=e.apply(void 0,arguments)}finally{if(exports.__interactionsRef.current=d,null!==b)b.onWorkStopped(c,a)}}return h}finally{f||(f=!0,c.forEach(function(a){a.__count--;if(null!==b&&0===a.__count)b.onInteractionScheduledWorkCompleted(a)}))}}var a=1<arguments.length&&void 0!==arguments[1]?arguments[1]:
+0,c=exports.__interactionsRef.current,b=exports.__subscriberRef.current;if(null!==b)b.onWorkScheduled(c,a);c.forEach(function(a){a.__count++});var f=!1;d.cancel=function(){b=exports.__subscriberRef.current;try{if(null!==b)b.onWorkCanceled(c,a)}finally{c.forEach(function(a){a.__count--;if(b&&0===a.__count)b.onInteractionScheduledWorkCompleted(a)})}};return d};

cjs/scheduler.development.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-7325ebe4d
+/** @license React vundefined
  * scheduler.development.js
@@ -12,4 +12,2 @@ *
 
-
-
 if (process.env.NODE_ENV !== "production") {
@@ -19,178 +17,198 @@ (function() {
 
-Object.defineProperty(exports, '__esModule', { value: true });
+var enableSchedulerDebugging = false;
+var enableProfiling = false;
 
-// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:
+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();
 
-// In some cases, StrictMode should also double-render lifecycles.
-// This can be confusing for tests though,
-// And it can be bad for performance in production.
-// This feature flag can be used to control the behavior:
+    if (last !== first) {
+      heap[0] = last;
+      siftDown(heap, last, 0);
+    }
 
+    return first;
+  } else {
+    return null;
+  }
+}
 
-// To preserve the "Pause on caught exceptions" behavior of the debugger, we
-// replay the begin phase of a failed component inside invokeGuardedCallback.
+function siftUp(heap, node, i) {
+  var index = i;
 
+  while (true) {
+    var parentIndex = index - 1 >>> 1;
+    var parent = heap[parentIndex];
 
-// Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:
+    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;
 
-// Gather advanced timing metrics for Profiler subtrees.
+  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;
+    }
+  }
+}
 
-// Trace which interactions trigger each commit.
+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 ImmediatePriority = 1;
+var UserBlockingPriority = 2;
+var NormalPriority = 3;
+var LowPriority = 4;
+var IdlePriority = 5;
 
-// Only used in www builds.
- // TODO: true? Here it might just be false.
+function markTaskErrored(task, ms) {
+}
 
-// Only used in www builds.
-var enableSchedulerDebugging = true;
+/* eslint-disable no-var */
 
-// Only used in www builds.
+var hasPerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
 
+if (hasPerformanceNow) {
+  var localPerformance = performance;
 
-// React Fire: prevent the value and checked attributes from syncing
-// with their related DOM properties
+  exports.unstable_now = function () {
+    return localPerformance.now();
+  };
+} else {
+  var localDate = Date;
+  var initialTime = localDate.now();
 
+  exports.unstable_now = function () {
+    return localDate.now() - initialTime;
+  };
+} // Max 31 bit integer. The max integer size in V8 for 32-bit systems.
+// Math.pow(2, 30) - 1
+// 0b111111111111111111111111111111
 
-// These APIs will no longer be "unstable" in the upcoming 16.7 release,
-// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.
 
-/* eslint-disable no-var */
+var maxSigned31BitInt = 1073741823; // Times out immediately
 
-// TODO: Use symbols?
-var ImmediatePriority = 1;
-var UserBlockingPriority = 2;
-var NormalPriority = 3;
-var LowPriority = 4;
-var IdlePriority = 5;
+var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out
 
-// Max 31 bit integer. The max integer size in V8 for 32-bit systems.
-// 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 USER_BLOCKING_PRIORITY_TIMEOUT = 250;
 var NORMAL_PRIORITY_TIMEOUT = 5000;
-var LOW_PRIORITY_TIMEOUT = 10000;
-// Never times out
-var IDLE_PRIORITY = maxSigned31BitInt;
+var LOW_PRIORITY_TIMEOUT = 10000; // Never times out
 
-// Callbacks are stored as a circular, doubly linked list.
-var firstCallbackNode = null;
+var IDLE_PRIORITY_TIMEOUT = maxSigned31BitInt; // Tasks are stored on a min heap
 
-var currentDidTimeout = false;
-// Pausing the scheduler is useful for debugging.
-var isSchedulerPaused = false;
+var taskQueue = [];
+var timerQueue = []; // Incrementing id counter. Used to maintain insertion order.
 
-var currentPriorityLevel = NormalPriority;
-var currentEventStartTime = -1;
-var currentExpirationTime = -1;
+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.
 
-// This is set when a callback is being executed, to prevent re-entrancy.
-var isExecutingCallback = false;
-
+var isPerformingWork = false;
 var isHostCallbackScheduled = false;
+var isHostTimeoutScheduled = false; // Capture local references to native APIs, in case a polyfill overrides them.
 
-var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
+var setTimeout = window.setTimeout;
+var clearTimeout = window.clearTimeout;
+var setImmediate = window.setImmediate; // IE and Node.js + jsdom
 
-function ensureHostCallbackIsScheduled() {
-  if (isExecutingCallback) {
-    // Don't schedule work yet; wait until the next time we yield.
-    return;
+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;
+
+  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://reactjs.org/link/react-polyfills');
   }
-  // Schedule the host callback using the earliest expiration in the list.
-  var expirationTime = firstCallbackNode.expirationTime;
-  if (!isHostCallbackScheduled) {
-    isHostCallbackScheduled = true;
-  } else {
-    // Cancel the existing host callback.
-    cancelHostCallback();
+
+  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://reactjs.org/link/react-polyfills');
   }
-  requestHostCallback(flushWork, expirationTime);
 }
 
-function flushFirstCallback() {
-  var flushedNode = firstCallbackNode;
+function advanceTimers(currentTime) {
+  // Check for tasks that are no longer delayed and add them to the queue.
+  var timer = peek(timerQueue);
 
-  // Remove the node from the list before calling the callback. That way the
-  // list is in a consistent state even if the callback throws.
-  var next = firstCallbackNode.next;
-  if (firstCallbackNode === next) {
-    // This is the last callback in the list.
-    firstCallbackNode = null;
-    next = null;
-  } else {
-    var lastCallbackNode = firstCallbackNode.previous;
-    firstCallbackNode = lastCallbackNode.next = next;
-    next.previous = lastCallbackNode;
-  }
+  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);
+    } else {
+      // Remaining timers are pending.
+      return;
+    }
 
-  flushedNode.next = flushedNode.previous = null;
-
-  // Now it's safe to call the callback.
-  var callback = flushedNode.callback;
-  var expirationTime = flushedNode.expirationTime;
-  var priorityLevel = flushedNode.priorityLevel;
-  var previousPriorityLevel = currentPriorityLevel;
-  var previousExpirationTime = currentExpirationTime;
-  currentPriorityLevel = priorityLevel;
-  currentExpirationTime = expirationTime;
-  var continuationCallback;
-  try {
-    continuationCallback = callback();
-  } finally {
-    currentPriorityLevel = previousPriorityLevel;
-    currentExpirationTime = previousExpirationTime;
+    timer = peek(timerQueue);
   }
+}
 
-  // A callback may return a continuation. The continuation should be scheduled
-  // with the same priority and expiration as the just-finished callback.
-  if (typeof continuationCallback === 'function') {
-    var continuationNode = {
-      callback: continuationCallback,
-      priorityLevel: priorityLevel,
-      expirationTime: expirationTime,
-      next: null,
-      previous: null
-    };
+function handleTimeout(currentTime) {
+  isHostTimeoutScheduled = false;
+  advanceTimers(currentTime);
 
-    // Insert the new callback into the list, sorted by its expiration. This is
-    // almost the same as the code in `scheduleCallback`, except the callback
-    // is inserted into the list *before* callbacks of equal expiration instead
-    // of after.
-    if (firstCallbackNode === null) {
-      // This is the first callback in the list.
-      firstCallbackNode = continuationNode.next = continuationNode.previous = continuationNode;
+  if (!isHostCallbackScheduled) {
+    if (peek(taskQueue) !== null) {
+      isHostCallbackScheduled = true;
+      requestHostCallback(flushWork);
     } else {
-      var nextAfterContinuation = null;
-      var node = firstCallbackNode;
-      do {
-        if (node.expirationTime >= expirationTime) {
-          // This callback expires at or after the continuation. We will insert
-          // the continuation *before* this callback.
-          nextAfterContinuation = node;
-          break;
-        }
-        node = node.next;
-      } while (node !== firstCallbackNode);
+      var firstTimer = peek(timerQueue);
 
-      if (nextAfterContinuation === null) {
-        // No equal or lower priority callback was found, which means the new
-        // callback is the lowest priority callback in the list.
-        nextAfterContinuation = firstCallbackNode;
-      } else if (nextAfterContinuation === firstCallbackNode) {
-        // The new callback is the highest priority callback in the list.
-        firstCallbackNode = continuationNode;
-        ensureHostCallbackIsScheduled();
+      if (firstTimer !== null) {
+        requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
       }
-
-      var previous = nextAfterContinuation.previous;
-      previous.next = nextAfterContinuation.previous = continuationNode;
-      continuationNode.next = nextAfterContinuation;
-      continuationNode.previous = previous;
     }
@@ -200,74 +218,89 @@ }
 
-function flushImmediateWork() {
-  if (
-  // Confirm we've exited the outer most event handler
-  currentEventStartTime === -1 && firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority) {
-    isExecutingCallback = true;
-    try {
-      do {
-        flushFirstCallback();
-      } while (
-      // Keep flushing until there are no more immediate callbacks
-      firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority);
-    } finally {
-      isExecutingCallback = false;
-      if (firstCallbackNode !== null) {
-        // There's still work remaining. Request another callback.
-        ensureHostCallbackIsScheduled();
-      } else {
-        isHostCallbackScheduled = false;
-      }
-    }
-  }
-}
+function flushWork(hasTimeRemaining, initialTime) {
 
-function flushWork(didTimeout) {
-  // Exit right away if we're currently paused
 
-  if (enableSchedulerDebugging && isSchedulerPaused) {
-    return;
+  isHostCallbackScheduled = false;
+
+  if (isHostTimeoutScheduled) {
+    // We scheduled a timeout but it's no longer needed. Cancel it.
+    isHostTimeoutScheduled = false;
+    cancelHostTimeout();
   }
 
-  isExecutingCallback = true;
-  var previousDidTimeout = currentDidTimeout;
-  currentDidTimeout = didTimeout;
+  isPerformingWork = true;
+  var previousPriorityLevel = currentPriorityLevel;
+
   try {
-    if (didTimeout) {
-      // Flush all the expired callbacks without yielding.
-      while (firstCallbackNode !== null && !(enableSchedulerDebugging && isSchedulerPaused)) {
-        // TODO Wrap i nfeature flag
-        // Read the current time. Flush all the callbacks that expire at or
-        // earlier than that time. Then read the current time again and repeat.
-        // This optimizes for as few performance.now calls as possible.
-        var currentTime = exports.unstable_now();
-        if (firstCallbackNode.expirationTime <= currentTime) {
-          do {
-            flushFirstCallback();
-          } while (firstCallbackNode !== null && firstCallbackNode.expirationTime <= currentTime && !(enableSchedulerDebugging && isSchedulerPaused));
-          continue;
+    if (enableProfiling) {
+      try {
+        return workLoop(hasTimeRemaining, initialTime);
+      } catch (error) {
+        if (currentTask !== null) {
+          var currentTime = exports.unstable_now();
+          markTaskErrored(currentTask, currentTime);
+          currentTask.isQueued = false;
         }
-        break;
+
+        throw error;
       }
     } else {
-      // Keep flushing callbacks until we run out of time in the frame.
-      if (firstCallbackNode !== null) {
-        do {
-          if (enableSchedulerDebugging && isSchedulerPaused) {
-            break;
-          }
-          flushFirstCallback();
-        } while (firstCallbackNode !== null && !shouldYieldToHost());
-      }
+      // No catch in prod code path.
+      return workLoop(hasTimeRemaining, initialTime);
     }
   } finally {
-    isExecutingCallback = false;
-    currentDidTimeout = previousDidTimeout;
-    if (firstCallbackNode !== null) {
-      // There's still work remaining. Request another callback.
-      ensureHostCallbackIsScheduled();
+    currentTask = null;
+    currentPriorityLevel = previousPriorityLevel;
+    isPerformingWork = false;
+  }
+}
+
+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 (typeof callback === 'function') {
+      currentTask.callback = null;
+      currentPriorityLevel = currentTask.priorityLevel;
+      var didUserCallbackTimeout = currentTask.expirationTime <= currentTime;
+
+      var continuationCallback = callback(didUserCallbackTimeout);
+      currentTime = exports.unstable_now();
+
+      if (typeof continuationCallback === 'function') {
+        currentTask.callback = continuationCallback;
+      } else {
+
+        if (currentTask === peek(taskQueue)) {
+          pop(taskQueue);
+        }
+      }
+
+      advanceTimers(currentTime);
     } else {
-      isHostCallbackScheduled = false;
+      pop(taskQueue);
     }
-    // Before exiting, flush all the immediate work that was scheduled.
-    flushImmediateWork();
+
+    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;
   }
@@ -284,2 +317,3 @@ }
       break;
+
     default:
@@ -290,5 +324,3 @@ priorityLevel = NormalPriority;
   var previousPriorityLevel = currentPriorityLevel;
-  var previousEventStartTime = currentEventStartTime;
   currentPriorityLevel = priorityLevel;
-  currentEventStartTime = exports.unstable_now();
 
@@ -299,7 +331,30 @@ try {
     currentPriorityLevel = previousPriorityLevel;
-    currentEventStartTime = previousEventStartTime;
+  }
+}
 
-    // Before exiting, flush all the immediate work that was scheduled.
-    flushImmediateWork();
+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;
+  }
 }
@@ -312,5 +367,3 @@
     var previousPriorityLevel = currentPriorityLevel;
-    var previousEventStartTime = currentEventStartTime;
     currentPriorityLevel = parentPriorityLevel;
-    currentEventStartTime = exports.unstable_now();
 
@@ -321,4 +374,2 @@ try {
       currentPriorityLevel = previousPriorityLevel;
-      currentEventStartTime = previousEventStartTime;
-      flushImmediateWork();
     }
@@ -328,83 +379,93 @@ };
 
-function unstable_scheduleCallback(callback, deprecated_options) {
-  var startTime = currentEventStartTime !== -1 ? currentEventStartTime : exports.unstable_now();
+function unstable_scheduleCallback(priorityLevel, callback, options) {
+  var currentTime = exports.unstable_now();
+  var startTime;
 
-  var expirationTime;
-  if (typeof deprecated_options === 'object' && deprecated_options !== null && typeof deprecated_options.timeout === 'number') {
-    // FIXME: Remove this branch once we lift expiration times out of React.
-    expirationTime = startTime + deprecated_options.timeout;
+  if (typeof options === 'object' && options !== null) {
+    var delay = options.delay;
+
+    if (typeof delay === 'number' && delay > 0) {
+      startTime = currentTime + delay;
+    } else {
+      startTime = currentTime;
+    }
   } else {
-    switch (currentPriorityLevel) {
-      case ImmediatePriority:
-        expirationTime = startTime + IMMEDIATE_PRIORITY_TIMEOUT;
-        break;
-      case UserBlockingPriority:
-        expirationTime = startTime + USER_BLOCKING_PRIORITY;
-        break;
-      case IdlePriority:
-        expirationTime = startTime + IDLE_PRIORITY;
-        break;
-      case LowPriority:
-        expirationTime = startTime + LOW_PRIORITY_TIMEOUT;
-        break;
-      case NormalPriority:
-      default:
-        expirationTime = startTime + NORMAL_PRIORITY_TIMEOUT;
-    }
+    startTime = currentTime;
   }
 
-  var newNode = {
+  var timeout;
+
+  switch (priorityLevel) {
+    case ImmediatePriority:
+      timeout = IMMEDIATE_PRIORITY_TIMEOUT;
+      break;
+
+    case UserBlockingPriority:
+      timeout = USER_BLOCKING_PRIORITY_TIMEOUT;
+      break;
+
+    case IdlePriority:
+      timeout = IDLE_PRIORITY_TIMEOUT;
+      break;
+
+    case LowPriority:
+      timeout = LOW_PRIORITY_TIMEOUT;
+      break;
+
+    case NormalPriority:
+    default:
+      timeout = NORMAL_PRIORITY_TIMEOUT;
+      break;
+  }
+
+  var expirationTime = startTime + timeout;
+  var newTask = {
+    id: taskIdCounter++,
     callback: callback,
-    priorityLevel: currentPriorityLevel,
+    priorityLevel: priorityLevel,
+    startTime: startTime,
     expirationTime: expirationTime,
-    next: null,
-    previous: null
+    sortIndex: -1
   };
 
-  // Insert the new callback into the list, ordered first by expiration, then
-  // by insertion. So the new callback is inserted any other callback with
-  // equal expiration.
-  if (firstCallbackNode === null) {
-    // This is the first callback in the list.
-    firstCallbackNode = newNode.next = newNode.previous = newNode;
-    ensureHostCallbackIsScheduled();
+  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 {
-    var next = null;
-    var node = firstCallbackNode;
-    do {
-      if (node.expirationTime > expirationTime) {
-        // The new callback expires before this one.
-        next = node;
-        break;
-      }
-      node = node.next;
-    } while (node !== firstCallbackNode);
+    newTask.sortIndex = expirationTime;
+    push(taskQueue, newTask);
+    // wait until the next time we yield.
 
-    if (next === null) {
-      // No callback with a later expiration was found, which means the new
-      // callback has the latest expiration in the list.
-      next = firstCallbackNode;
-    } else if (next === firstCallbackNode) {
-      // The new callback has the earliest expiration in the entire list.
-      firstCallbackNode = newNode;
-      ensureHostCallbackIsScheduled();
+
+    if (!isHostCallbackScheduled && !isPerformingWork) {
+      isHostCallbackScheduled = true;
+      requestHostCallback(flushWork);
     }
-
-    var previous = next.previous;
-    previous.next = next.previous = newNode;
-    newNode.next = next;
-    newNode.previous = previous;
   }
 
-  return newNode;
+  return newTask;
 }
 
 function unstable_pauseExecution() {
-  isSchedulerPaused = true;
 }
 
 function unstable_continueExecution() {
-  isSchedulerPaused = false;
-  if (firstCallbackNode !== null) {
-    ensureHostCallbackIsScheduled();
+
+  if (!isHostCallbackScheduled && !isPerformingWork) {
+    isHostCallbackScheduled = true;
+    requestHostCallback(flushWork);
   }
@@ -414,26 +475,11 @@ }
 function unstable_getFirstCallbackNode() {
-  return firstCallbackNode;
+  return peek(taskQueue);
 }
 
-function unstable_cancelCallback(callbackNode) {
-  var next = callbackNode.next;
-  if (next === null) {
-    // Already cancelled.
-    return;
-  }
+function unstable_cancelCallback(task) {
+  // remove from the queue because you can't remove arbitrary nodes from an
+  // array based heap, only the first one.)
 
-  if (next === callbackNode) {
-    // This is the only scheduled callback. Clear the list.
-    firstCallbackNode = null;
-  } else {
-    // Remove the callback from its position in the list.
-    if (callbackNode === firstCallbackNode) {
-      firstCallbackNode = next;
-    }
-    var previous = callbackNode.previous;
-    previous.next = next;
-    next.previous = previous;
-  }
 
-  callbackNode.next = callbackNode.previous = null;
+  task.callback = null;
 }
@@ -445,270 +491,141 @@
 
-function unstable_shouldYield() {
-  return !currentDidTimeout && (firstCallbackNode !== null && firstCallbackNode.expirationTime < currentExpirationTime || shouldYieldToHost());
-}
+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.
 
-// The remaining code is essentially a polyfill for requestIdleCallback. It
-// works by scheduling a requestAnimationFrame, storing the time for the start
-// of the frame, then scheduling a postMessage which gets scheduled after paint.
-// Within the postMessage handler do as much work as possible until time + frame
-// rate. By separating the idle call into a separate event tick we ensure that
-// layout, paint and other browser work is counted against the available time.
-// The frame rate is dynamically adjusted.
+var yieldInterval = 5;
+var deadline = 0; // TODO: Make this configurable
 
-// We capture a local reference to any global, in case it gets polyfilled after
-// this module is initially evaluated. We want to be using a
-// consistent implementation.
-var localDate = Date;
+function shouldYieldToHost() {
+  {
+    // `isInputPending` is not available. Since we have no way of knowing if
+    // there's pending input, always yield at the end of the frame.
+    return exports.unstable_now() >= deadline;
+  }
+}
 
-// This initialization code may run even on server environments if a component
-// just imports ReactDOM (e.g. for findDOMNode). Some environments might not
-// have setTimeout or clearTimeout. However, we always expect them to be defined
-// on the client. https://github.com/facebook/react/pull/13088
-var localSetTimeout = typeof setTimeout === 'function' ? setTimeout : undefined;
-var localClearTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined;
+function requestPaint() {
 
-// We don't expect either of these to necessarily be defined, but we will error
-// later if they are missing on the client.
-var localRequestAnimationFrame = typeof requestAnimationFrame === 'function' ? requestAnimationFrame : undefined;
-var localCancelAnimationFrame = typeof cancelAnimationFrame === 'function' ? cancelAnimationFrame : undefined;
+}
 
-// requestAnimationFrame does not run when the tab is in the background. If
-// we're backgrounded we prefer for that work to happen so that the page
-// continues to load in the background. So we also schedule a 'setTimeout' as
-// a fallback.
-// TODO: Need a better heuristic for backgrounded work.
-var ANIMATION_FRAME_TIMEOUT = 100;
-var rAFID;
-var rAFTimeoutID;
-var requestAnimationFrameWithTimeout = function (callback) {
-  // schedule rAF and also a setTimeout
-  rAFID = localRequestAnimationFrame(function (timestamp) {
-    // cancel the setTimeout
-    localClearTimeout(rAFTimeoutID);
-    callback(timestamp);
-  });
-  rAFTimeoutID = localSetTimeout(function () {
-    // cancel the requestAnimationFrame
-    localCancelAnimationFrame(rAFID);
-    callback(exports.unstable_now());
-  }, ANIMATION_FRAME_TIMEOUT);
-};
+function forceFrameRate(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 frame rates higher than 125 fps is not supported');
+    return;
+  }
 
-if (hasNativePerformanceNow) {
-  var Performance = performance;
-  exports.unstable_now = function () {
-    return Performance.now();
-  };
-} else {
-  exports.unstable_now = function () {
-    return localDate.now();
-  };
+  if (fps > 0) {
+    yieldInterval = Math.floor(1000 / fps);
+  } else {
+    // reset the framerate
+    yieldInterval = 5;
+  }
 }
 
-var requestHostCallback;
-var cancelHostCallback;
-var shouldYieldToHost;
+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.
 
-var globalValue = null;
-if (typeof window !== 'undefined') {
-  globalValue = window;
-} else if (typeof global !== 'undefined') {
-  globalValue = global;
-}
+    deadline = currentTime + yieldInterval;
+    var hasTimeRemaining = true; // If a scheduler task throws, exit the current browser task so the
+    // error can be observed.
+    //
+    // Intentionally not using a try-catch, since that makes some debugging
+    // techniques harder. Instead, if `scheduledHostCallback` errors, then
+    // `hasMoreWork` will remain true, and we'll continue the work loop.
 
-if (globalValue && globalValue._schedMock) {
-  // Dynamic injection, only for testing purposes.
-  var globalImpl = globalValue._schedMock;
-  requestHostCallback = globalImpl[0];
-  cancelHostCallback = globalImpl[1];
-  shouldYieldToHost = globalImpl[2];
-  exports.unstable_now = globalImpl[3];
-} else 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 _flushCallback = function (didTimeout) {
-    if (_callback !== null) {
-      try {
-        _callback(didTimeout);
-      } finally {
-        _callback = null;
+    var hasMoreWork = true;
+
+    try {
+      hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);
+    } finally {
+      if (hasMoreWork) {
+        // If there's more work, schedule the next message event at the end
+        // of the preceding one.
+        schedulePerformWorkUntilDeadline();
+      } else {
+        isMessageLoopRunning = false;
+        scheduledHostCallback = null;
       }
     }
-  };
-  requestHostCallback = function (cb, ms) {
-    if (_callback !== null) {
-      // Protect against re-entrancy.
-      setTimeout(requestHostCallback, 0, cb);
-    } else {
-      _callback = cb;
-      setTimeout(_flushCallback, 0, false);
-    }
-  };
-  cancelHostCallback = function () {
-    _callback = null;
-  };
-  shouldYieldToHost = function () {
-    return false;
-  };
-} else {
-  if (typeof console !== 'undefined') {
-    // TODO: Remove fb.me link
-    if (typeof localRequestAnimationFrame !== 'function') {
-      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 localCancelAnimationFrame !== 'function') {
-      console.error("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
-    }
-  }
+  } else {
+    isMessageLoopRunning = false;
+  } // Yielding to the browser will give it a chance to paint, so we can
+};
 
-  var scheduledHostCallback = null;
-  var isMessageEventScheduled = false;
-  var timeoutTime = -1;
+var schedulePerformWorkUntilDeadline;
 
-  var isAnimationFrameScheduled = false;
-
-  var isFlushingHostCallback = false;
-
-  var frameDeadline = 0;
-  // We start out assuming that we run at 30fps but then the heuristic tracking
-  // will adjust this value to a faster fps if we get more frequent animation
-  // frames.
-  var previousFrameTime = 33;
-  var activeFrameTime = 33;
-
-  shouldYieldToHost = function () {
-    return frameDeadline <= exports.unstable_now();
+if (typeof setImmediate === 'function') {
+  // Node.js and old IE.
+  // There's a few reasons for why we prefer setImmediate.
+  //
+  // Unlike MessageChannel, it doesn't prevent a Node.js process from exiting.
+  // (Even though this is a DOM fork of the Scheduler, you could get here
+  // with a mix of Node.js 15+, which has a MessageChannel, and jsdom.)
+  // https://github.com/facebook/react/issues/20756
+  //
+  // But also, it runs earlier which is the semantic we want.
+  // If other browsers ever implement it, it's better to use it.
+  // Although both of these would be inferior to native scheduling.
+  schedulePerformWorkUntilDeadline = function () {
+    setImmediate(performWorkUntilDeadline);
   };
-
-  // We use the postMessage trick to defer idle work until after the repaint.
+} else {
   var channel = new MessageChannel();
   var port = channel.port2;
-  channel.port1.onmessage = function (event) {
-    isMessageEventScheduled = false;
+  channel.port1.onmessage = performWorkUntilDeadline;
 
-    var prevScheduledCallback = scheduledHostCallback;
-    var prevTimeoutTime = timeoutTime;
-    scheduledHostCallback = null;
-    timeoutTime = -1;
-
-    var currentTime = exports.unstable_now();
-
-    var didTimeout = false;
-    if (frameDeadline - currentTime <= 0) {
-      // There's no time left in this idle period. Check if the callback has
-      // a timeout and whether it's been exceeded.
-      if (prevTimeoutTime !== -1 && prevTimeoutTime <= currentTime) {
-        // Exceeded the timeout. Invoke the callback even though there's no
-        // time left.
-        didTimeout = true;
-      } else {
-        // No timeout.
-        if (!isAnimationFrameScheduled) {
-          // Schedule another animation callback so we retry later.
-          isAnimationFrameScheduled = true;
-          requestAnimationFrameWithTimeout(animationTick);
-        }
-        // Exit without invoking the callback.
-        scheduledHostCallback = prevScheduledCallback;
-        timeoutTime = prevTimeoutTime;
-        return;
-      }
-    }
-
-    if (prevScheduledCallback !== null) {
-      isFlushingHostCallback = true;
-      try {
-        prevScheduledCallback(didTimeout);
-      } finally {
-        isFlushingHostCallback = false;
-      }
-    }
+  schedulePerformWorkUntilDeadline = function () {
+    port.postMessage(null);
   };
+}
 
-  var animationTick = function (rafTime) {
-    if (scheduledHostCallback !== null) {
-      // Eagerly schedule the next animation callback at the beginning of the
-      // frame. If the scheduler queue is not empty at the end of the frame, it
-      // will continue flushing inside that callback. If the queue *is* empty,
-      // then it will exit immediately. Posting the callback at the start of the
-      // frame ensures it's fired within the earliest possible frame. If we
-      // waited until the end of the frame to post the callback, we risk the
-      // browser skipping a frame and not firing the callback until the frame
-      // after that.
-      requestAnimationFrameWithTimeout(animationTick);
-    } else {
-      // No pending work. Exit.
-      isAnimationFrameScheduled = false;
-      return;
-    }
+function requestHostCallback(callback) {
+  scheduledHostCallback = callback;
 
-    var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
-    if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) {
-      if (nextFrameTime < 8) {
-        // Defensive coding. We don't support higher frame rates than 120hz.
-        // If the calculated frame time gets lower than 8, it is probably a bug.
-        nextFrameTime = 8;
-      }
-      // If one frame goes long, then the next one can be short to catch up.
-      // If two frames are short in a row, then that's an indication that we
-      // actually have a higher frame rate than what we're currently optimizing.
-      // We adjust our heuristic dynamically accordingly. For example, if we're
-      // running on 120hz display or 90hz VR display.
-      // Take the max of the two in case one of them was an anomaly due to
-      // missed frame deadlines.
-      activeFrameTime = nextFrameTime < previousFrameTime ? previousFrameTime : nextFrameTime;
-    } else {
-      previousFrameTime = nextFrameTime;
-    }
-    frameDeadline = rafTime + activeFrameTime;
-    if (!isMessageEventScheduled) {
-      isMessageEventScheduled = true;
-      port.postMessage(undefined);
-    }
-  };
+  if (!isMessageLoopRunning) {
+    isMessageLoopRunning = true;
+    schedulePerformWorkUntilDeadline();
+  }
+}
 
-  requestHostCallback = function (callback, absoluteTimeout) {
-    scheduledHostCallback = callback;
-    timeoutTime = absoluteTimeout;
-    if (isFlushingHostCallback || absoluteTimeout < 0) {
-      // Don't wait for the next frame. Continue working ASAP, in a new event.
-      port.postMessage(undefined);
-    } else if (!isAnimationFrameScheduled) {
-      // If rAF didn't already schedule one, we need to schedule a frame.
-      // TODO: If this rAF doesn't materialize because the browser throttles, we
-      // might want to still have setTimeout trigger rIC as a backup to ensure
-      // that we keep performing work.
-      isAnimationFrameScheduled = true;
-      requestAnimationFrameWithTimeout(animationTick);
-    }
-  };
+function requestHostTimeout(callback, ms) {
+  taskTimeoutID = setTimeout(function () {
+    callback(exports.unstable_now());
+  }, ms);
+}
 
-  cancelHostCallback = function () {
-    scheduledHostCallback = null;
-    isMessageEventScheduled = false;
-    timeoutTime = -1;
-  };
+function cancelHostTimeout() {
+  clearTimeout(taskTimeoutID);
+  taskTimeoutID = -1;
 }
 
+var unstable_requestPaint = requestPaint;
+var unstable_Profiling =  null;
+
+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_NormalPriority = NormalPriority;
-exports.unstable_IdlePriority = IdlePriority;
-exports.unstable_LowPriority = LowPriority;
+exports.unstable_cancelCallback = unstable_cancelCallback;
+exports.unstable_continueExecution = unstable_continueExecution;
+exports.unstable_forceFrameRate = forceFrameRate;
+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_cancelCallback = unstable_cancelCallback;
+exports.unstable_shouldYield = shouldYieldToHost;
 exports.unstable_wrapCallback = unstable_wrapCallback;
-exports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
-exports.unstable_shouldYield = unstable_shouldYield;
-exports.unstable_continueExecution = unstable_continueExecution;
-exports.unstable_pauseExecution = unstable_pauseExecution;
-exports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
   })();
 }

cjs/scheduler.production.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-7325ebe4d
+/** @license React vundefined
  * scheduler.production.min.js
@@ -9,14 +9,11 @@ *
  */
-
-'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var c=null,f=!1,h=3,k=-1,l=-1,m=!1,n=!1;function p(){if(!m){var a=c.expirationTime;n?q():n=!0;r(t,a)}}
-function u(){var a=c,b=c.next;if(c===b)c=null;else{var d=c.previous;c=d.next=b;b.previous=d}a.next=a.previous=null;d=a.callback;b=a.expirationTime;a=a.priorityLevel;var e=h,Q=l;h=a;l=b;try{var g=d()}finally{h=e,l=Q}if("function"===typeof g)if(g={callback:g,priorityLevel:a,expirationTime:b,next:null,previous:null},null===c)c=g.next=g.previous=g;else{d=null;a=c;do{if(a.expirationTime>=b){d=a;break}a=a.next}while(a!==c);null===d?d=c:d===c&&(c=g,p());b=d.previous;b.next=d.previous=g;g.next=d;g.previous=
-b}}function v(){if(-1===k&&null!==c&&1===c.priorityLevel){m=!0;try{do u();while(null!==c&&1===c.priorityLevel)}finally{m=!1,null!==c?p():n=!1}}}function t(a){m=!0;var b=f;f=a;try{if(a)for(;null!==c;){var d=exports.unstable_now();if(c.expirationTime<=d){do u();while(null!==c&&c.expirationTime<=d)}else break}else if(null!==c){do u();while(null!==c&&!w())}}finally{m=!1,f=b,null!==c?p():n=!1,v()}}
-var x=Date,y="function"===typeof setTimeout?setTimeout:void 0,z="function"===typeof clearTimeout?clearTimeout:void 0,A="function"===typeof requestAnimationFrame?requestAnimationFrame:void 0,B="function"===typeof cancelAnimationFrame?cancelAnimationFrame:void 0,C,D;function E(a){C=A(function(b){z(D);a(b)});D=y(function(){B(C);a(exports.unstable_now())},100)}
-if("object"===typeof performance&&"function"===typeof performance.now){var F=performance;exports.unstable_now=function(){return F.now()}}else exports.unstable_now=function(){return x.now()};var r,q,w,G=null;"undefined"!==typeof window?G=window:"undefined"!==typeof global&&(G=global);
-if(G&&G._schedMock){var H=G._schedMock;r=H[0];q=H[1];w=H[2];exports.unstable_now=H[3]}else if("undefined"===typeof window||"function"!==typeof MessageChannel){var I=null,J=function(a){if(null!==I)try{I(a)}finally{I=null}};r=function(a){null!==I?setTimeout(r,0,a):(I=a,setTimeout(J,0,!1))};q=function(){I=null};w=function(){return!1}}else{"undefined"!==typeof console&&("function"!==typeof A&&console.error("This browser doesn't support requestAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"),
-"function"!==typeof B&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"));var K=null,L=!1,M=-1,N=!1,O=!1,P=0,R=33,S=33;w=function(){return P<=exports.unstable_now()};var T=new MessageChannel,U=T.port2;T.port1.onmessage=function(){L=!1;var a=K,b=M;K=null;M=-1;var d=exports.unstable_now(),e=!1;if(0>=P-d)if(-1!==b&&b<=d)e=!0;else{N||(N=!0,E(V));K=a;M=b;return}if(null!==a){O=!0;try{a(e)}finally{O=!1}}};
-var V=function(a){if(null!==K){E(V);var b=a-P+S;b<S&&R<S?(8>b&&(b=8),S=b<R?R:b):R=b;P=a+S;L||(L=!0,U.postMessage(void 0))}else N=!1};r=function(a,b){K=a;M=b;O||0>b?U.postMessage(void 0):N||(N=!0,E(V))};q=function(){K=null;L=!1;M=-1}}exports.unstable_ImmediatePriority=1;exports.unstable_UserBlockingPriority=2;exports.unstable_NormalPriority=3;exports.unstable_IdlePriority=5;exports.unstable_LowPriority=4;
-exports.unstable_runWithPriority=function(a,b){switch(a){case 1:case 2:case 3:case 4:case 5:break;default:a=3}var d=h,e=k;h=a;k=exports.unstable_now();try{return b()}finally{h=d,k=e,v()}};
-exports.unstable_scheduleCallback=function(a,b){var d=-1!==k?k:exports.unstable_now();if("object"===typeof b&&null!==b&&"number"===typeof b.timeout)b=d+b.timeout;else switch(h){case 1:b=d+-1;break;case 2:b=d+250;break;case 5:b=d+1073741823;break;case 4:b=d+1E4;break;default:b=d+5E3}a={callback:a,priorityLevel:h,expirationTime:b,next:null,previous:null};if(null===c)c=a.next=a.previous=a,p();else{d=null;var e=c;do{if(e.expirationTime>b){d=e;break}e=e.next}while(e!==c);null===d?d=c:d===c&&(c=a,p());
-b=d.previous;b.next=d.previous=a;a.next=d;a.previous=b}return a};exports.unstable_cancelCallback=function(a){var b=a.next;if(null!==b){if(b===a)c=null;else{a===c&&(c=b);var d=a.previous;d.next=b;b.previous=d}a.next=a.previous=null}};exports.unstable_wrapCallback=function(a){var b=h;return function(){var d=h,e=k;h=b;k=exports.unstable_now();try{return a.apply(this,arguments)}finally{h=d,k=e,v()}}};exports.unstable_getCurrentPriorityLevel=function(){return h};
-exports.unstable_shouldYield=function(){return!f&&(null!==c&&c.expirationTime<l||w())};exports.unstable_continueExecution=function(){null!==c&&p()};exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return c};
+'use strict';function f(a,b){var c=a.length;a.push(b);a:for(;;){var d=c-1>>>1,e=a[d];if(void 0!==e&&0<g(e,b))a[d]=b,a[c]=e,c=d;else break a}}function h(a){a=a[0];return void 0===a?null:a}function k(a){var b=a[0];if(void 0!==b){var c=a.pop();if(c!==b){a[0]=c;a:for(var d=0,e=a.length;d<e;){var m=2*(d+1)-1,n=a[m],r=m+1,q=a[r];if(void 0!==n&&0>g(n,c))void 0!==q&&0>g(q,n)?(a[d]=q,a[r]=c,d=r):(a[d]=n,a[m]=c,d=m);else if(void 0!==q&&0>g(q,c))a[d]=q,a[r]=c,d=r;else break a}}return b}return null}
+function g(a,b){var c=a.sortIndex-b.sortIndex;return 0!==c?c:a.id-b.id}if("object"===typeof performance&&"function"===typeof performance.now){var l=performance;exports.unstable_now=function(){return l.now()}}else{var p=Date,t=p.now();exports.unstable_now=function(){return p.now()-t}}var u=[],v=[],w=1,x=null,y=3,z=!1,A=!1,B=!1,C=window.setTimeout,D=window.clearTimeout,E=window.setImmediate;
+if("undefined"!==typeof console){var F=window.cancelAnimationFrame;"function"!==typeof window.requestAnimationFrame&&console.error("This browser doesn't support requestAnimationFrame. Make sure that you load a polyfill in older browsers. https://reactjs.org/link/react-polyfills");"function"!==typeof F&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://reactjs.org/link/react-polyfills")}
+function G(a){for(var b=h(v);null!==b;){if(null===b.callback)k(v);else if(b.startTime<=a)k(v),b.sortIndex=b.expirationTime,f(u,b);else break;b=h(v)}}function H(a){B=!1;G(a);if(!A)if(null!==h(u))A=!0,I(J);else{var b=h(v);null!==b&&K(H,b.startTime-a)}}
+function J(a,b){A=!1;B&&(B=!1,D(L),L=-1);z=!0;var c=y;try{G(b);for(x=h(u);null!==x&&(!(x.expirationTime>b)||a&&!M());){var d=x.callback;if("function"===typeof d){x.callback=null;y=x.priorityLevel;var e=d(x.expirationTime<=b);b=exports.unstable_now();"function"===typeof e?x.callback=e:x===h(u)&&k(u);G(b)}else k(u);x=h(u)}if(null!==x)var m=!0;else{var n=h(v);null!==n&&K(H,n.startTime-b);m=!1}return m}finally{x=null,y=c,z=!1}}var N=!1,O=null,L=-1,P=5,Q=0;
+function M(){return exports.unstable_now()>=Q}function R(){if(null!==O){var a=exports.unstable_now();Q=a+P;var b=!0;try{b=O(!0,a)}finally{b?S():(N=!1,O=null)}}else N=!1}var S;if("function"===typeof E)S=function(){E(R)};else{var T=new MessageChannel,U=T.port2;T.port1.onmessage=R;S=function(){U.postMessage(null)}}function I(a){O=a;N||(N=!0,S())}function K(a,b){L=C(function(){a(exports.unstable_now())},b)}exports.unstable_IdlePriority=5;exports.unstable_ImmediatePriority=1;
+exports.unstable_LowPriority=4;exports.unstable_NormalPriority=3;exports.unstable_Profiling=null;exports.unstable_UserBlockingPriority=2;exports.unstable_cancelCallback=function(a){a.callback=null};exports.unstable_continueExecution=function(){A||z||(A=!0,I(J))};exports.unstable_forceFrameRate=function(a){0>a||125<a?console.error("forceFrameRate takes a positive int between 0 and 125, forcing frame rates higher than 125 fps is not supported"):P=0<a?Math.floor(1E3/a):5};
+exports.unstable_getCurrentPriorityLevel=function(){return y};exports.unstable_getFirstCallbackNode=function(){return h(u)};exports.unstable_next=function(a){switch(y){case 1:case 2:case 3:var b=3;break;default:b=y}var c=y;y=b;try{return a()}finally{y=c}};exports.unstable_pauseExecution=function(){};exports.unstable_requestPaint=function(){};exports.unstable_runWithPriority=function(a,b){switch(a){case 1:case 2:case 3:case 4:case 5:break;default:a=3}var c=y;y=a;try{return b()}finally{y=c}};
+exports.unstable_scheduleCallback=function(a,b,c){var d=exports.unstable_now();"object"===typeof c&&null!==c?(c=c.delay,c="number"===typeof c&&0<c?d+c:d):c=d;switch(a){case 1:var e=-1;break;case 2:e=250;break;case 5:e=1073741823;break;case 4:e=1E4;break;default:e=5E3}e=c+e;a={id:w++,callback:b,priorityLevel:a,startTime:c,expirationTime:e,sortIndex:-1};c>d?(a.sortIndex=c,f(v,a),null===h(u)&&a===h(v)&&(B?(D(L),L=-1):B=!0,K(H,c-d))):(a.sortIndex=e,f(u,a),A||z||(A=!0,I(J)));return a};
+exports.unstable_shouldYield=M;exports.unstable_wrapCallback=function(a){var b=y;return function(){var c=y;y=b;try{return a.apply(this,arguments)}finally{y=c}}};

index.js

 'use strict';
 
-if (process.env.NODE_ENV === 'production') {
+if (typeof window === 'undefined' || typeof MessageChannel !== 'function') {
+  module.exports = require('./unstable_no_dom');
+} else if (process.env.NODE_ENV === 'production') {
   module.exports = require('./cjs/scheduler.production.min.js');
@@ -5,0 +7,0 @@ } else {

package.json

 {
   "name": "scheduler",
-  "version": "0.0.0-7325ebe4d",
+  "version": "0.0.0-73e900b0e",
   "description": "Cooperative scheduler for the browser environment.",
   "main": "index.js",
-  "repository": "facebook/react",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/facebook/react.git",
+    "directory": "packages/scheduler"
+  },
   "license": "MIT",
@@ -26,2 +30,5 @@ "keywords": [
     "tracing-profiling.js",
+    "unstable_mock.js",
+    "unstable_no_dom.js",
+    "unstable_post_task.js",
     "cjs/",
@@ -35,2 +42,2 @@ "umd/"
   }
-}
+}

umd/scheduler-tracing.development.js

@@ -17,4 +17,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.SchedulerTracing = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.SchedulerTracing = factory(global));
 })(this, function(global) {
@@ -21,0 +21,0 @@ function unstable_clear() {

umd/scheduler-tracing.production.min.js

@@ -17,4 +17,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.SchedulerTracing = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.SchedulerTracing = factory(global));
 })(this, function(global) {
@@ -21,0 +21,0 @@ function unstable_clear() {

umd/scheduler-tracing.profiling.min.js

@@ -17,4 +17,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.SchedulerTracing = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.SchedulerTracing = factory(global));
 })(this, function(global) {
@@ -21,0 +21,0 @@ function unstable_clear() {

umd/scheduler.development.js

@@ -19,4 +19,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.Scheduler = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.Scheduler = factory(global));
 })(this, function(global) {
@@ -51,2 +51,9 @@ function unstable_now() {
 
+  function unstable_requestPaint() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_requestPaint.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_runWithPriority() {
@@ -59,2 +66,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_runWithPriority.apply(
 
+  function unstable_next() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_next.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_wrapCallback() {
@@ -95,2 +109,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_wrapCallback.apply(
 
+  function unstable_forceFrameRate() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_forceFrameRate.apply(
+      this,
+      arguments
+    );
+  }
+
   return Object.freeze({
@@ -101,3 +122,5 @@ unstable_now: unstable_now,
     unstable_shouldYield: unstable_shouldYield,
+    unstable_requestPaint: unstable_requestPaint,
     unstable_runWithPriority: unstable_runWithPriority,
+    unstable_next: unstable_next,
     unstable_wrapCallback: unstable_wrapCallback,
@@ -108,3 +131,28 @@ unstable_getCurrentPriorityLevel: unstable_getCurrentPriorityLevel,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
+    get unstable_IdlePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_IdlePriority;
+    },
+    get unstable_ImmediatePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_ImmediatePriority;
+    },
+    get unstable_LowPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_LowPriority;
+    },
+    get unstable_NormalPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_NormalPriority;
+    },
+    get unstable_UserBlockingPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_UserBlockingPriority;
+    },
+    get unstable_Profiling() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_Profiling;
+    },
   });
 });

umd/scheduler.production.min.js

@@ -19,4 +19,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.Scheduler = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.Scheduler = factory(global));
 })(this, function(global) {
@@ -51,2 +51,9 @@ function unstable_now() {
 
+  function unstable_requestPaint() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_requestPaint.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_runWithPriority() {
@@ -59,2 +66,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_runWithPriority.apply(
 
+  function unstable_next() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_next.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_wrapCallback() {
@@ -89,2 +103,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_wrapCallback.apply(
 
+  function unstable_forceFrameRate() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_forceFrameRate.apply(
+      this,
+      arguments
+    );
+  }
+
   return Object.freeze({
@@ -95,3 +116,5 @@ unstable_now: unstable_now,
     unstable_shouldYield: unstable_shouldYield,
+    unstable_requestPaint: unstable_requestPaint,
     unstable_runWithPriority: unstable_runWithPriority,
+    unstable_next: unstable_next,
     unstable_wrapCallback: unstable_wrapCallback,
@@ -102,3 +125,28 @@ unstable_getCurrentPriorityLevel: unstable_getCurrentPriorityLevel,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
+    get unstable_IdlePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_IdlePriority;
+    },
+    get unstable_ImmediatePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_ImmediatePriority;
+    },
+    get unstable_LowPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_LowPriority;
+    },
+    get unstable_NormalPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_NormalPriority;
+    },
+    get unstable_UserBlockingPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_UserBlockingPriority;
+    },
+    get unstable_Profiling() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_Profiling;
+    },
   });
 });

umd/scheduler.profiling.min.js

@@ -19,4 +19,4 @@ /**
     : typeof define === 'function' && define.amd // eslint-disable-line no-undef
-      ? define(['react'], factory) // eslint-disable-line no-undef
-      : (global.Scheduler = factory(global));
+    ? define(['react'], factory) // eslint-disable-line no-undef
+    : (global.Scheduler = factory(global));
 })(this, function(global) {
@@ -51,2 +51,9 @@ function unstable_now() {
 
+  function unstable_requestPaint() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_requestPaint.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_runWithPriority() {
@@ -59,2 +66,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_runWithPriority.apply(
 
+  function unstable_next() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_next.apply(
+      this,
+      arguments
+    );
+  }
+
   function unstable_wrapCallback() {
@@ -89,2 +103,9 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_wrapCallback.apply(
 
+  function unstable_forceFrameRate() {
+    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.Scheduler.unstable_forceFrameRate.apply(
+      this,
+      arguments
+    );
+  }
+
   return Object.freeze({
@@ -95,3 +116,5 @@ unstable_now: unstable_now,
     unstable_shouldYield: unstable_shouldYield,
+    unstable_requestPaint: unstable_requestPaint,
     unstable_runWithPriority: unstable_runWithPriority,
+    unstable_next: unstable_next,
     unstable_wrapCallback: unstable_wrapCallback,
@@ -102,3 +125,28 @@ unstable_getCurrentPriorityLevel: unstable_getCurrentPriorityLevel,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
+    get unstable_IdlePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_IdlePriority;
+    },
+    get unstable_ImmediatePriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_ImmediatePriority;
+    },
+    get unstable_LowPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_LowPriority;
+    },
+    get unstable_NormalPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_NormalPriority;
+    },
+    get unstable_UserBlockingPriority() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_UserBlockingPriority;
+    },
+    get unstable_Profiling() {
+      return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
+        .Scheduler.unstable_Profiling;
+    },
   });
 });

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150353

increased by140%

Number of package files

30

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Lines of code

3844

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