# Installation
> `npm install --save @types/scheduler`
# Summary
This package contains type definitions for scheduler (https://reactjs.org/).
# Details
Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/scheduler.
## [index.d.ts](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/scheduler/index.d.ts)
````ts
// eslint-disable-next-line @typescript-eslint/no-invalid-void-type
export type FrameCallbackType = (didTimeout: boolean) => FrameCallbackType | void;
export interface CallbackNode {
callback: FrameCallbackType;
priorityLevel: number;
expirationTime: number;
next: CallbackNode | null;
prev: CallbackNode | null;
}
export const unstable_ImmediatePriority = 1;
export const unstable_UserBlockingPriority = 2;
export const unstable_NormalPriority = 3;
export const unstable_IdlePriority = 5;
export const unstable_LowPriority = 4;
export function unstable_runWithPriority<T>(priorityLevel: number, eventHandler: () => T): T;
export function unstable_scheduleCallback(
priorityLevel: number,
callback: FrameCallbackType,
options?: { delay?: number | undefined; timeout?: number | undefined },
): CallbackNode;
export function unstable_next<T>(eventHandler: () => T): T;
export function unstable_cancelCallback(callbackNode: CallbackNode): void;
export function unstable_wrapCallback(callback: FrameCallbackType): () => FrameCallbackType;
export function unstable_getCurrentPriorityLevel(): number;
export function unstable_shouldYield(): boolean;
export function unstable_continueExecution(): void;
export function unstable_pauseExecution(): void;
export function unstable_getFirstCallbackNode(): CallbackNode | null;
export function unstable_now(): number;
````
### Additional Details
* Last updated: Tue, 26 Mar 2024 08:07:57 GMT
* Dependencies: none
# Credits
These definitions were written by [Nathan Bierema](https://github.com/Methuselah96), and [Sebastian Silbermann](https://github.com/eps1lon).
Generated by dwww version 1.16 on Mon Dec 8 15:03:15 CET 2025.