# scheduler

> Cooperative scheduler for the browser environment.

Latest version **0.28.0** (published 2026-09-09) · MIT license · 0 weekly downloads

## Install

```sh
npm install scheduler
pnpm add scheduler
yarn add scheduler
bun add scheduler
```

## Health

**Score 73/100 (B)** — status: active.

Positive: has types package; no vulnerabilities; has provenance; recently updated; high maintenance score; popular repo; extremely popular.

Warnings: low downloads; no esm support; pre 1.0.

## Facts

| | |
|---|---|
| Version | 0.28.0 |
| Published | 2026-09-09 |
| First published | 2011-01-11 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | separate (@types/scheduler) |
| Module format | CommonJS |
| Dependencies | 0 |
| Unpacked size | 80.7 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 249152 |
| Maintainers | fb, react-bot |
| Keywords | react |

## Links

- npm: https://www.npmjs.com/package/scheduler
- Repository: https://github.com/react/react
- Homepage: https://react.dev/
- Issues: https://github.com/react/react/issues
- npm.io page: https://npm.io/package/scheduler

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## Recent versions

- 0.28.0 (latest) — 2026-09-09
- 0.0.0-experimental-82c44beb-20260910 (experimental) — 2026-09-10
- 0.28.0-canary-82c44beb-20260910 (canary) — 2026-09-10
- 0.28.0-canary-d5736f09-20260507 (next) — 2026-05-08
- 0.25.0-rc.1 (rc) — 2024-11-14
- 0.25.0-beta-26f2496093-20240514 (beta) — 2024-05-14
- 0.0.0-experimental-1d34f91d-20260909 — 2026-09-09
- 0.28.0-canary-1d34f91d-20260909 — 2026-09-09
- 0.0.0-experimental-6c0e1047-20260908 — 2026-09-08
- 0.28.0-canary-6c0e1047-20260908 — 2026-09-08
- 0.0.0-experimental-f1f7ed2a-20260904 — 2026-09-07
- 0.28.0-canary-f1f7ed2a-20260904 — 2026-09-07
- 0.0.0-experimental-8425b691-20260904 — 2026-09-04
- 0.28.0-canary-8425b691-20260904 — 2026-09-04
- 0.0.0-experimental-d9f4e76b-20260903 — 2026-09-03
- … 2760 more at https://npm.io/package/scheduler/versions

## README

# `scheduler`

This is a package for cooperative scheduling in a browser environment. It is currently used internally by React, but we plan to make it more generic.

The public API for this package is not yet finalized.

### Thanks

The React team thanks [Anton Podviaznikov](https://podviaznikov.com/) for donating the `scheduler` package name.

---
_Source: https://npm.io/package/scheduler · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._