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scheduleCallback() — react Function Reference

Architecture documentation for the scheduleCallback() function in ReactFiberRootScheduler.js from the react codebase.

Function javascript BabelCompiler Validation called by 1

Entity Profile

Dependency Diagram

graph TD
  1beb843d_0f9e_46a6_110d_6fdec691be24["scheduleCallback()"]
  a22f22c8_f97a_86c8_be5a_4b91a6a21eab["ReactFiberRootScheduler.js"]
  1beb843d_0f9e_46a6_110d_6fdec691be24 -->|defined in| a22f22c8_f97a_86c8_be5a_4b91a6a21eab
  2f0b078e_5ecb_a4c3_220a_f89cb5bd5a89["scheduleTaskForRootDuringMicrotask()"]
  2f0b078e_5ecb_a4c3_220a_f89cb5bd5a89 -->|calls| 1beb843d_0f9e_46a6_110d_6fdec691be24
  style 1beb843d_0f9e_46a6_110d_6fdec691be24 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-reconciler/src/ReactFiberRootScheduler.js lines 626–639

function scheduleCallback(
  priorityLevel: PriorityLevel,
  callback: RenderTaskFn,
) {
  if (__DEV__ && ReactSharedInternals.actQueue !== null) {
    // Special case: We're inside an `act` scope (a testing utility).
    // Instead of scheduling work in the host environment, add it to a
    // fake internal queue that's managed by the `act` implementation.
    ReactSharedInternals.actQueue.push(callback);
    return fakeActCallbackNode;
  } else {
    return Scheduler_scheduleCallback(priorityLevel, callback);
  }
}

Domain

Subdomains

Defined In

Called By

Source

Frequently Asked Questions

What does scheduleCallback() do?
scheduleCallback() is a function in the react codebase, defined in packages/react-reconciler/src/ReactFiberRootScheduler.js.
Where is scheduleCallback() defined?
scheduleCallback() is defined in packages/react-reconciler/src/ReactFiberRootScheduler.js at line 626.
What calls scheduleCallback()?
scheduleCallback() is called by 1 function(s): scheduleTaskForRootDuringMicrotask.

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