scheduler - npm Package Compare versions

Comparing version 0.0.0-f9e41e3a5 to 0.0.0-fa1e8df11

build-info.json

 {
-  "branch": "pull/15192",
-  "buildNumber": "14024",
-  "checksum": "24ccd39",
-  "commit": "f9e41e3a5",
+  "branch": "master",
+  "buildNumber": "18068",
+  "checksum": "486c52d",
+  "commit": "fa1e8df11",
   "environment": "ci",
-  "reactVersion": "16.8.4-canary-f9e41e3a5"
+  "reactVersion": "16.8.6-canary-fa1e8df11"
 }

cjs/scheduler-tracing.development.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-f9e41e3a5
+/** @license React v0.0.0-fa1e8df11
  * scheduler-tracing.development.js
@@ -51,2 +51,8 @@ *
 
+// Disable javascript: URL strings in href for XSS protection.
+
+
+// Disables yielding during render in Concurrent Mode. Used for debugging only.
+
+
 // React Fire: prevent the value and checked attributes from syncing
@@ -59,2 +65,20 @@ // with their related DOM properties
 
+
+
+
+// See https://github.com/react-native-community/discussions-and-proposals/issues/72 for more information
+// This is a flag so we can fix warnings in RN core before turning it on
+
+
+// Experimental React Events support. Only used in www builds for now.
+
+
+// New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107
+
+
+// We will enforce mocking scheduler with scheduler/unstable_mock at some point. (v17?)
+// Till then, we warn about the missing mock, but still fallback to a sync mode compatible version
+
+// Temporary flag to revert the fix in #15650
+
 var DEFAULT_THREAD_ID = 0;
@@ -61,0 +85,0 @@

cjs/scheduler-tracing.production.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-f9e41e3a5
+/** @license React v0.0.0-fa1e8df11
  * scheduler-tracing.production.min.js
@@ -3,0 +3,0 @@ *

cjs/scheduler-tracing.profiling.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-f9e41e3a5
+/** @license React v0.0.0-fa1e8df11
  * scheduler-tracing.profiling.min.js
@@ -3,0 +3,0 @@ *

cjs/scheduler.development.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-f9e41e3a5
+/** @license React v0.0.0-fa1e8df11
  * scheduler.development.js
@@ -22,2 +22,258 @@ *
 
+// The DOM Scheduler implementation is similar to 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 requestHostCallback = void 0;
+var cancelHostCallback = void 0;
+var shouldYieldToHost = void 0;
+exports.unstable_now = void 0;
+exports.unstable_forceFrameRate = void 0;
+
+var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
+
+// 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;
+
+// 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;
+
+// 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 = void 0;
+var rAFTimeoutID = void 0;
+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);
+};
+
+if (hasNativePerformanceNow) {
+  var Performance = performance;
+  exports.unstable_now = function () {
+    return Performance.now();
+  };
+} else {
+  exports.unstable_now = function () {
+    return localDate.now();
+  };
+}
+
+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;
+      }
+    }
+  };
+  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;
+  };
+  exports.unstable_forceFrameRate = function () {};
+} 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');
+    }
+  }
+
+  var scheduledHostCallback = null;
+  var isMessageEventScheduled = false;
+  var timeoutTime = -1;
+
+  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;
+  var fpsLocked = false;
+
+  shouldYieldToHost = function () {
+    return frameDeadline <= exports.unstable_now();
+  };
+
+  exports.unstable_forceFrameRate = function (fps) {
+    if (fps < 0 || fps > 125) {
+      console.error('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing framerates higher than 125 fps is not unsupported');
+      return;
+    }
+    if (fps > 0) {
+      activeFrameTime = Math.floor(1000 / fps);
+      fpsLocked = true;
+    } else {
+      // reset the framerate
+      activeFrameTime = 33;
+      fpsLocked = false;
+    }
+  };
+
+  // We use the postMessage trick to defer idle work until after the repaint.
+  var channel = new MessageChannel();
+  var port = channel.port2;
+  channel.port1.onmessage = function (event) {
+    isMessageEventScheduled = false;
+
+    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;
+      }
+    }
+  };
+
+  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;
+    }
+
+    var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
+    if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime && !fpsLocked) {
+      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);
+    }
+  };
+
+  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);
+    }
+  };
+
+  cancelHostCallback = function () {
+    scheduledHostCallback = null;
+    isMessageEventScheduled = false;
+    timeoutTime = -1;
+  };
+}
+
 /* eslint-disable no-var */
@@ -49,3 +305,3 @@
 
-var currentDidTimeout = false;
+var currentHostCallbackDidTimeout = false;
 // Pausing the scheduler is useful for debugging.
@@ -58,27 +314,27 @@ var isSchedulerPaused = false;
 
-// This is set when a callback is being executed, to prevent re-entrancy.
-var isExecutingCallback = false;
+// This is set while performing work, to prevent re-entrancy.
+var isPerformingWork = false;
 
 var isHostCallbackScheduled = false;
 
-var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
-
-function ensureHostCallbackIsScheduled() {
-  if (isExecutingCallback) {
+function scheduleHostCallbackIfNeeded() {
+  if (isPerformingWork) {
     // Don't schedule work yet; wait until the next time we yield.
     return;
   }
-  // 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 (firstCallbackNode !== null) {
+    // Schedule the host callback using the earliest expiration in the list.
+    var expirationTime = firstCallbackNode.expirationTime;
+    if (isHostCallbackScheduled) {
+      // Cancel the existing host callback.
+      cancelHostCallback();
+    } else {
+      isHostCallbackScheduled = true;
+    }
+    requestHostCallback(flushWork, expirationTime);
   }
-  requestHostCallback(flushWork, expirationTime);
 }
 
 function flushFirstCallback() {
-  var flushedNode = firstCallbackNode;
+  var currentlyFlushingCallback = firstCallbackNode;
 
@@ -98,8 +354,8 @@ // Remove the node from the list before calling the callback. That way the
 
-  flushedNode.next = flushedNode.previous = null;
+  currentlyFlushingCallback.next = currentlyFlushingCallback.previous = null;
 
   // Now it's safe to call the callback.
-  var callback = flushedNode.callback;
-  var expirationTime = flushedNode.expirationTime;
-  var priorityLevel = flushedNode.priorityLevel;
+  var callback = currentlyFlushingCallback.callback;
+  var expirationTime = currentlyFlushingCallback.expirationTime;
+  var priorityLevel = currentlyFlushingCallback.priorityLevel;
   var previousPriorityLevel = currentPriorityLevel;
@@ -111,3 +367,8 @@ var previousExpirationTime = currentExpirationTime;
   try {
-    continuationCallback = callback();
+    var didUserCallbackTimeout = currentHostCallbackDidTimeout ||
+    // Immediate priority callbacks are always called as if they timed out
+    priorityLevel === ImmediatePriority;
+    continuationCallback = callback(didUserCallbackTimeout);
+  } catch (error) {
+    throw error;
   } finally {
@@ -156,3 +417,3 @@ currentPriorityLevel = previousPriorityLevel;
         firstCallbackNode = continuationNode;
-        ensureHostCallbackIsScheduled();
+        scheduleHostCallbackIfNeeded();
       }
@@ -168,28 +429,4 @@
 
-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(didTimeout) {
+function flushWork(didUserCallbackTimeout) {
   // Exit right away if we're currently paused
-
   if (enableSchedulerDebugging && isSchedulerPaused) {
@@ -199,7 +436,10 @@ return;
 
-  isExecutingCallback = true;
-  var previousDidTimeout = currentDidTimeout;
-  currentDidTimeout = didTimeout;
+  // We'll need a new host callback the next time work is scheduled.
+  isHostCallbackScheduled = false;
+
+  isPerformingWork = true;
+  var previousDidTimeout = currentHostCallbackDidTimeout;
+  currentHostCallbackDidTimeout = didUserCallbackTimeout;
   try {
-    if (didTimeout) {
+    if (didUserCallbackTimeout) {
       // Flush all the expired callbacks without yielding.
@@ -232,12 +472,6 @@ while (firstCallbackNode !== null && !(enableSchedulerDebugging && isSchedulerPaused)) {
   } finally {
-    isExecutingCallback = false;
-    currentDidTimeout = previousDidTimeout;
-    if (firstCallbackNode !== null) {
-      // There's still work remaining. Request another callback.
-      ensureHostCallbackIsScheduled();
-    } else {
-      isHostCallbackScheduled = false;
-    }
-    // Before exiting, flush all the immediate work that was scheduled.
-    flushImmediateWork();
+    isPerformingWork = false;
+    currentHostCallbackDidTimeout = previousDidTimeout;
+    // There's still work remaining. Request another callback.
+    scheduleHostCallbackIfNeeded();
   }
@@ -265,8 +499,9 @@ }
     return eventHandler();
+  } catch (error) {
+    // There's still work remaining. Request another callback.
+    scheduleHostCallbackIfNeeded();
+    throw error;
   } finally {
     currentPriorityLevel = previousPriorityLevel;
     currentEventStartTime = previousEventStartTime;
-
-    // Before exiting, flush all the immediate work that was scheduled.
-    flushImmediateWork();
   }
@@ -297,8 +532,9 @@ }
     return eventHandler();
+  } catch (error) {
+    // There's still work remaining. Request another callback.
+    scheduleHostCallbackIfNeeded();
+    throw error;
   } finally {
     currentPriorityLevel = previousPriorityLevel;
     currentEventStartTime = previousEventStartTime;
-
-    // Before exiting, flush all the immediate work that was scheduled.
-    flushImmediateWork();
   }
@@ -318,6 +554,9 @@ }
       return callback.apply(this, arguments);
+    } catch (error) {
+      // There's still work remaining. Request another callback.
+      scheduleHostCallbackIfNeeded();
+      throw error;
     } finally {
       currentPriorityLevel = previousPriorityLevel;
       currentEventStartTime = previousEventStartTime;
-      flushImmediateWork();
     }
@@ -327,3 +566,3 @@ };
 
-function unstable_scheduleCallback(callback, deprecated_options) {
+function unstable_scheduleCallback(priorityLevel, callback, deprecated_options) {
   var startTime = currentEventStartTime !== -1 ? currentEventStartTime : exports.unstable_now();
@@ -336,3 +575,3 @@
   } else {
-    switch (currentPriorityLevel) {
+    switch (priorityLevel) {
       case ImmediatePriority:
@@ -358,3 +597,3 @@ expirationTime = startTime + IMMEDIATE_PRIORITY_TIMEOUT;
     callback: callback,
-    priorityLevel: currentPriorityLevel,
+    priorityLevel: priorityLevel,
     expirationTime: expirationTime,
@@ -366,8 +605,8 @@ next: null,
   // 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.
+  // by insertion. So the new callback is inserted after any other callback
+  // with equal expiration.
   if (firstCallbackNode === null) {
     // This is the first callback in the list.
     firstCallbackNode = newNode.next = newNode.previous = newNode;
-    ensureHostCallbackIsScheduled();
+    scheduleHostCallbackIfNeeded();
   } else {
@@ -392,3 +631,3 @@ var next = null;
       firstCallbackNode = newNode;
-      ensureHostCallbackIsScheduled();
+      scheduleHostCallbackIfNeeded();
     }
@@ -412,3 +651,3 @@
   if (firstCallbackNode !== null) {
-    ensureHostCallbackIsScheduled();
+    scheduleHostCallbackIfNeeded();
   }
@@ -449,254 +688,5 @@ }
 function unstable_shouldYield() {
-  return !currentDidTimeout && (firstCallbackNode !== null && firstCallbackNode.expirationTime < currentExpirationTime || shouldYieldToHost());
+  return !currentHostCallbackDidTimeout && (firstCallbackNode !== null && firstCallbackNode.expirationTime < currentExpirationTime || shouldYieldToHost());
 }
 
-// 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.
-
-// 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;
-
-// 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;
-
-// 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);
-};
-
-if (hasNativePerformanceNow) {
-  var Performance = performance;
-  exports.unstable_now = function () {
-    return Performance.now();
-  };
-} else {
-  exports.unstable_now = function () {
-    return localDate.now();
-  };
-}
-
-var requestHostCallback;
-var cancelHostCallback;
-var shouldYieldToHost;
-
-var globalValue = null;
-if (typeof window !== 'undefined') {
-  globalValue = window;
-} else if (typeof global !== 'undefined') {
-  globalValue = global;
-}
-
-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;
-      }
-    }
-  };
-  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');
-    }
-  }
-
-  var scheduledHostCallback = null;
-  var isMessageEventScheduled = false;
-  var timeoutTime = -1;
-
-  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();
-  };
-
-  // We use the postMessage trick to defer idle work until after the repaint.
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = function (event) {
-    isMessageEventScheduled = false;
-
-    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;
-      }
-    }
-  };
-
-  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;
-    }
-
-    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);
-    }
-  };
-
-  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);
-    }
-  };
-
-  cancelHostCallback = function () {
-    scheduledHostCallback = null;
-    isMessageEventScheduled = false;
-    timeoutTime = -1;
-  };
-}
-
 exports.unstable_ImmediatePriority = ImmediatePriority;
@@ -703,0 +693,0 @@ exports.unstable_UserBlockingPriority = UserBlockingPriority;

cjs/scheduler.production.min.js

@@ -1,2 +0,2 @@
-/** @license React v0.0.0-f9e41e3a5
+/** @license React v0.0.0-fa1e8df11
  * scheduler.production.min.js
@@ -10,13 +10,13 @@ *
 
-'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var d=null,e=!1,g=3,k=-1,l=-1,m=!1,n=!1;function p(){if(!m){var a=d.expirationTime;n?q():n=!0;r(t,a)}}
-function u(){var a=d,b=d.next;if(d===b)d=null;else{var c=d.previous;d=c.next=b;b.previous=c}a.next=a.previous=null;c=a.callback;b=a.expirationTime;a=a.priorityLevel;var f=g,Q=l;g=a;l=b;try{var h=c()}finally{g=f,l=Q}if("function"===typeof h)if(h={callback:h,priorityLevel:a,expirationTime:b,next:null,previous:null},null===d)d=h.next=h.previous=h;else{c=null;a=d;do{if(a.expirationTime>=b){c=a;break}a=a.next}while(a!==d);null===c?c=d:c===d&&(d=h,p());b=c.previous;b.next=c.previous=h;h.next=c;h.previous=
-b}}function v(){if(-1===k&&null!==d&&1===d.priorityLevel){m=!0;try{do u();while(null!==d&&1===d.priorityLevel)}finally{m=!1,null!==d?p():n=!1}}}function t(a){m=!0;var b=e;e=a;try{if(a)for(;null!==d;){var c=exports.unstable_now();if(d.expirationTime<=c){do u();while(null!==d&&d.expirationTime<=c)}else break}else if(null!==d){do u();while(null!==d&&!w())}}finally{m=!1,e=b,null!==d?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 c=exports.unstable_now(),f=!1;if(0>=P-c)if(-1!==b&&b<=c)f=!0;else{N||(N=!0,E(V));K=a;M=b;return}if(null!==a){O=!0;try{a(f)}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 c=g,f=k;g=a;k=exports.unstable_now();try{return b()}finally{g=c,k=f,v()}};exports.unstable_next=function(a){switch(g){case 1:case 2:case 3:var b=3;break;default:b=g}var c=g,f=k;g=b;k=exports.unstable_now();try{return a()}finally{g=c,k=f,v()}};
-exports.unstable_scheduleCallback=function(a,b){var c=-1!==k?k:exports.unstable_now();if("object"===typeof b&&null!==b&&"number"===typeof b.timeout)b=c+b.timeout;else switch(g){case 1:b=c+-1;break;case 2:b=c+250;break;case 5:b=c+1073741823;break;case 4:b=c+1E4;break;default:b=c+5E3}a={callback:a,priorityLevel:g,expirationTime:b,next:null,previous:null};if(null===d)d=a.next=a.previous=a,p();else{c=null;var f=d;do{if(f.expirationTime>b){c=f;break}f=f.next}while(f!==d);null===c?c=d:c===d&&(d=a,p());
-b=c.previous;b.next=c.previous=a;a.next=c;a.previous=b}return a};exports.unstable_cancelCallback=function(a){var b=a.next;if(null!==b){if(b===a)d=null;else{a===d&&(d=b);var c=a.previous;c.next=b;b.previous=c}a.next=a.previous=null}};exports.unstable_wrapCallback=function(a){var b=g;return function(){var c=g,f=k;g=b;k=exports.unstable_now();try{return a.apply(this,arguments)}finally{g=c,k=f,v()}}};exports.unstable_getCurrentPriorityLevel=function(){return g};
-exports.unstable_shouldYield=function(){return!e&&(null!==d&&d.expirationTime<l||w())};exports.unstable_continueExecution=function(){null!==d&&p()};exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return d};
+'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var d=void 0,f=void 0,g=void 0;exports.unstable_now=void 0;exports.unstable_forceFrameRate=void 0;var k=Date,l="function"===typeof setTimeout?setTimeout:void 0,n="function"===typeof clearTimeout?clearTimeout:void 0,p="function"===typeof requestAnimationFrame?requestAnimationFrame:void 0,q="function"===typeof cancelAnimationFrame?cancelAnimationFrame:void 0,r=void 0,t=void 0;
+function u(a){r=p(function(b){n(t);a(b)});t=l(function(){q(r);a(exports.unstable_now())},100)}if("object"===typeof performance&&"function"===typeof performance.now){var v=performance;exports.unstable_now=function(){return v.now()}}else exports.unstable_now=function(){return k.now()};
+if("undefined"===typeof window||"function"!==typeof MessageChannel){var w=null,x=function(a){if(null!==w)try{w(a)}finally{w=null}};d=function(a){null!==w?setTimeout(d,0,a):(w=a,setTimeout(x,0,!1))};f=function(){w=null};g=function(){return!1};exports.unstable_forceFrameRate=function(){}}else{"undefined"!==typeof console&&("function"!==typeof p&&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 q&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"));var y=null,z=!1,A=-1,B=!1,C=!1,D=0,E=33,F=33,G=!1;g=function(){return D<=exports.unstable_now()};exports.unstable_forceFrameRate=function(a){0>a||125<a?console.error("forceFrameRate takes a positive int between 0 and 125, forcing framerates higher than 125 fps is not unsupported"):0<a?(F=Math.floor(1E3/a),G=!0):(F=33,G=!1)};var H=new MessageChannel,
+I=H.port2;H.port1.onmessage=function(){z=!1;var a=y,b=A;y=null;A=-1;var c=exports.unstable_now(),e=!1;if(0>=D-c)if(-1!==b&&b<=c)e=!0;else{B||(B=!0,u(J));y=a;A=b;return}if(null!==a){C=!0;try{a(e)}finally{C=!1}}};var J=function(a){if(null!==y){u(J);var b=a-D+F;b<F&&E<F&&!G?(8>b&&(b=8),F=b<E?E:b):E=b;D=a+F;z||(z=!0,I.postMessage(void 0))}else B=!1};d=function(a,b){y=a;A=b;C||0>b?I.postMessage(void 0):B||(B=!0,u(J))};f=function(){y=null;z=!1;A=-1}}var K=null,L=!1,M=3,N=-1,O=-1,P=!1,Q=!1;
+function R(){if(!P&&null!==K){var a=K.expirationTime;Q?f():Q=!0;d(S,a)}}
+function T(){var a=K,b=K.next;if(K===b)K=null;else{var c=K.previous;K=c.next=b;b.previous=c}a.next=a.previous=null;c=a.callback;b=a.expirationTime;a=a.priorityLevel;var e=M,m=O;M=a;O=b;try{var h=c(L||1===a)}catch(U){throw U;}finally{M=e,O=m}if("function"===typeof h)if(h={callback:h,priorityLevel:a,expirationTime:b,next:null,previous:null},null===K)K=h.next=h.previous=h;else{c=null;a=K;do{if(a.expirationTime>=b){c=a;break}a=a.next}while(a!==K);null===c?c=K:c===K&&(K=h,R());b=c.previous;b.next=c.previous=
+h;h.next=c;h.previous=b}}function S(a){Q=!1;P=!0;var b=L;L=a;try{if(a)for(;null!==K;){var c=exports.unstable_now();if(K.expirationTime<=c){do T();while(null!==K&&K.expirationTime<=c)}else break}else if(null!==K){do T();while(null!==K&&!g())}}finally{P=!1,L=b,R()}}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 c=M,e=N;M=a;N=exports.unstable_now();try{return b()}catch(m){throw R(),m;}finally{M=c,N=e}};exports.unstable_next=function(a){switch(M){case 1:case 2:case 3:var b=3;break;default:b=M}var c=M,e=N;M=b;N=exports.unstable_now();try{return a()}catch(m){throw R(),m;}finally{M=c,N=e}};
+exports.unstable_scheduleCallback=function(a,b,c){var e=-1!==N?N:exports.unstable_now();if("object"===typeof c&&null!==c&&"number"===typeof c.timeout)c=e+c.timeout;else switch(a){case 1:c=e+-1;break;case 2:c=e+250;break;case 5:c=e+1073741823;break;case 4:c=e+1E4;break;default:c=e+5E3}a={callback:b,priorityLevel:a,expirationTime:c,next:null,previous:null};if(null===K)K=a.next=a.previous=a,R();else{b=null;e=K;do{if(e.expirationTime>c){b=e;break}e=e.next}while(e!==K);null===b?b=K:b===K&&(K=a,R());c=
+b.previous;c.next=b.previous=a;a.next=b;a.previous=c}return a};exports.unstable_cancelCallback=function(a){var b=a.next;if(null!==b){if(b===a)K=null;else{a===K&&(K=b);var c=a.previous;c.next=b;b.previous=c}a.next=a.previous=null}};exports.unstable_wrapCallback=function(a){var b=M;return function(){var c=M,e=N;M=b;N=exports.unstable_now();try{return a.apply(this,arguments)}catch(m){throw R(),m;}finally{M=c,N=e}}};exports.unstable_getCurrentPriorityLevel=function(){return M};
+exports.unstable_shouldYield=function(){return!L&&(null!==K&&K.expirationTime<O||g())};exports.unstable_continueExecution=function(){null!==K&&R()};exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return K};

package.json

 {
   "name": "scheduler",
-  "version": "0.0.0-f9e41e3a5",
+  "version": "0.0.0-fa1e8df11",
   "description": "Cooperative scheduler for the browser environment.",
@@ -30,2 +30,3 @@ "main": "index.js",
     "tracing-profiling.js",
+    "unstable_mock.js",
     "cjs/",
@@ -32,0 +33,0 @@ "umd/"

umd/scheduler.development.js

@@ -99,2 +99,9 @@ /**
 
+  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({
@@ -112,2 +119,3 @@ unstable_now: unstable_now,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
     get unstable_IdlePriority() {
@@ -114,0 +122,0 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED

umd/scheduler.production.min.js

@@ -93,2 +93,9 @@ /**
 
+  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({
@@ -106,2 +113,3 @@ unstable_now: unstable_now,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
     get unstable_IdlePriority() {
@@ -108,0 +116,0 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED

umd/scheduler.profiling.min.js

@@ -93,2 +93,9 @@ /**
 
+  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({
@@ -106,2 +113,3 @@ unstable_now: unstable_now,
     unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
+    unstable_forceFrameRate: unstable_forceFrameRate,
     get unstable_IdlePriority() {
@@ -108,0 +116,0 @@ return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED

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Improved metrics

Total package byte prevSize

112153

increased by70.17%

Number of package files

23

increased by27.78%

Lines of code

2700

increased by68.43%

Worsened metrics

Number of low supply chain risk alerts

4

increased by33.33%

No dependency changes