Source symbols: packages/scheduler/src/forks/Scheduler.js

Deterministic, value-free symbol metadata extracted from public source. Implementations and literal values are not copied into this page.

• Revision: main@83840902c890f0eb85decda239ef6b1b14945779 · 2026-07-20T14:18:32Z
• Declarations: 69
• Referenced calls: 32

Declared symbols

• Callback — exported type at line 47
• getCurrentTime — let at line 59; references now
• hasPerformanceNow — const at line 60; references now
• localPerformance — const at line 65; references now
• localDate — const at line 68; references now, peek, pop, push, markTaskStart
• initialTime — const at line 69; references now, peek, pop, push, markTaskStart
• maxSigned31BitInt — var at line 76; references peek, pop, push, markTaskStart
• taskQueue — var at line 79; references peek, pop, push, markTaskStart
• timerQueue — var at line 80; references peek, pop, push, markTaskStart
• taskIdCounter — var at line 83; references peek, pop, push, markTaskStart
• currentTask — var at line 85; references peek, pop, push, markTaskStart
• currentPriorityLevel — var at line 86; references peek, pop, push, markTaskStart
• isPerformingWork — var at line 89; references peek, pop, push, markTaskStart
• isHostCallbackScheduled — var at line 91; references peek, pop, push, markTaskStart
• isHostTimeoutScheduled — var at line 92; references peek, pop, push, markTaskStart
• needsPaint — var at line 94; references peek, pop, push, markTaskStart
• localSetTimeout — const at line 97; references peek, pop, push, markTaskStart
• localClearTimeout — const at line 98; references peek, pop, push, markTaskStart
• localSetImmediate — const at line 100; references peek, pop, push, markTaskStart
• advanceTimers — function at line 103; references peek, pop, push, markTaskStart
• timer — let at line 105; references peek, pop, push, markTaskStart
• handleTimeout — function at line 128; references advanceTimers, peek, requestHostCallback, requestHostTimeout
• firstTimer — const at line 137; references peek, requestHostTimeout
• flushWork — function at line 145; references markSchedulerUnsuspended, cancelHostTimeout, workLoop, getCurrentTime, markTaskErrored, markSchedulerSuspended
• previousPriorityLevel — const at line 160; references workLoop, getCurrentTime, markTaskErrored, markSchedulerSuspended
• currentTime — const at line 168; references getCurrentTime, markTaskErrored, workLoop
• currentTime — const at line 187; references getCurrentTime, markSchedulerSuspended, advanceTimers, peek, shouldYieldToHost, markTaskRun, callback, markTaskYield, markTaskCompleted, pop, requestHostTimeout
• workLoop — function at line 193; references advanceTimers, peek, shouldYieldToHost, markTaskRun, callback, getCurrentTime, markTaskYield, markTaskCompleted, pop, requestHostTimeout
• currentTime — let at line 194; references advanceTimers, peek, shouldYieldToHost, markTaskRun, callback, getCurrentTime, markTaskYield, markTaskCompleted, pop
• callback — const at line 205; references markTaskRun, getCurrentTime, markTaskYield, advanceTimers, markTaskCompleted, peek, pop
• didUserCallbackTimeout — const at line 212; references markTaskRun
• continuationCallback — const at line 218; references callback, getCurrentTime, markTaskYield, advanceTimers, markTaskCompleted, peek, pop
• firstTimer — const at line 260; references peek, requestHostTimeout
• unstable_runWithPriority — function at line 268; references eventHandler
• previousPriorityLevel — var at line 283; references eventHandler
• unstable_next — function at line 293; references eventHandler
• priorityLevel — var at line 294
• previousPriorityLevel — var at line 308; references eventHandler
• unstable_wrapCallback — function at line 318; references apply
• parentPriorityLevel — var at line 319; references apply
• previousPriorityLevel — var at line 324; references apply
• unstable_scheduleCallback — function at line 335
• currentTime — var at line 340; references getCurrentTime
• startTime — var at line 342
• delay — var at line 345
• timeout — var at line 355
• expirationTime — var at line 380
• newTask — var at line 382
• unstable_cancelCallback — function at line 429; references getCurrentTime, markTaskCanceled
• currentTime — const at line 433; references getCurrentTime, markTaskCanceled
• unstable_getCurrentPriorityLevel — function at line 445
• isMessageLoopRunning — let at line 449; references getCurrentTime
• taskTimeoutID — let at line 450; references getCurrentTime
• frameInterval — let at line 456; references getCurrentTime
• startTime — let at line 457; references getCurrentTime
• shouldYieldToHost — function at line 459; references getCurrentTime
• timeElapsed — const at line 464; references getCurrentTime
• requestPaint — function at line 474
• forceFrameRate — function at line 481; references floor
• performWorkUntilDeadline — const at line 498; references getCurrentTime, flushWork, schedulePerformWorkUntilDeadline
• currentTime — const at line 504; references getCurrentTime, flushWork, schedulePerformWorkUntilDeadline
• hasMoreWork — let at line 515; references flushWork, schedulePerformWorkUntilDeadline
• schedulePerformWorkUntilDeadline — let at line 530; references localSetImmediate, MessageChannel, postMessage, localSetTimeout
• channel — const at line 549; references MessageChannel, postMessage
• port — const at line 550; references postMessage
• requestHostCallback — function at line 563; references schedulePerformWorkUntilDeadline
• requestHostTimeout — function at line 570; references localSetTimeout, callback, getCurrentTime
• cancelHostTimeout — function at line 580; references localClearTimeout
• unstable_Profiling — exported const at line 604; references startLoggingProfilingEvents, stopLoggingProfilingEvents

Imported modules

• ../SchedulerPriorities
• ../SchedulerFeatureFlags
• ../SchedulerMinHeap
• ../SchedulerProfiling

File-level call references

• now — line 66
• peek — line 105
• pop — line 109
• push — line 114
• markTaskStart — line 117
• advanceTimers — line 130
• requestHostCallback — line 135
• requestHostTimeout — line 139
• markSchedulerUnsuspended — line 148
• cancelHostTimeout — line 156
• workLoop — line 165
• getCurrentTime — line 168
• markTaskErrored — line 171
• markSchedulerSuspended — line 188
• shouldYieldToHost — line 199
• markTaskRun — line 216
• callback — line 218
• markTaskYield — line 228
• markTaskCompleted — line 236
• eventHandler — line 287
• apply — line 328
• markTaskCanceled — line 434
• floor — line 491
• flushWork — line 517
• schedulePerformWorkUntilDeadline — line 522
• localSetImmediate — line 544
• MessageChannel — line 549
• postMessage — line 553
• localSetTimeout — line 559
• localClearTimeout — line 582
• startLoggingProfilingEvents — line 605
• stopLoggingProfilingEvents — line 606

Source: packages/scheduler/src/forks/Scheduler.js