# metro

> 🚇 The JavaScript bundler for React Native.

Latest version **0.87.1** (published 2026-09-13) · MIT license · 0 weekly downloads

## Install

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

Provides the command `metro`.

## Health

**Score 70/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score.

Warnings: low downloads; pre 1.0.

## Facts

| | |
|---|---|
| Version | 0.87.1 |
| Published | 2026-09-13 |
| First published | 2011-10-12 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Node | ^22.13.0 \|\| ^24.3.0 \|\| >= 26.0.0 |
| Dependencies | 37 |
| Unpacked size | 979.2 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 5641 |
| Maintainers | fb, metro-bot |

## Links

- npm: https://www.npmjs.com/package/metro
- Repository: https://github.com/react/metro
- Homepage: https://github.com/react/metro#readme
- Issues: https://github.com/react/metro/issues
- npm.io page: https://npm.io/package/metro

## Dependencies (37)

- [ws](https://npm.io/package/ws.md) ^7.5.10
- [debug](https://npm.io/package/debug.md) ^4.4.0
- [yargs](https://npm.io/package/yargs.md) ^17.6.2
- [throat](https://npm.io/package/throat.md) ^5.0.0
- [accepts](https://npm.io/package/accepts.md) ^2.0.0
- [connect](https://npm.io/package/connect.md) ^3.6.5
- [invariant](https://npm.io/package/invariant.md) ^2.2.4
- [metro-core](https://npm.io/package/metro-core.md) 0.87.1
- [mime-types](https://npm.io/package/mime-types.md) ^3.0.1
- [nullthrows](https://npm.io/package/nullthrows.md) ^1.1.1
- [source-map](https://npm.io/package/source-map.md) ^0.5.6
- [@babel/core](https://npm.io/package/@babel/core.md) ^7.25.2
- [flow-parser](https://npm.io/package/flow-parser.md) 0.331.0
- [graceful-fs](https://npm.io/package/graceful-fs.md) ^4.2.4
- [jest-worker](https://npm.io/package/jest-worker.md) ^29.7.0
- [metro-cache](https://npm.io/package/metro-cache.md) 0.87.1
- [@babel/types](https://npm.io/package/@babel/types.md) ^7.29.0
- [jsc-safe-url](https://npm.io/package/jsc-safe-url.md) ^0.2.2
- [metro-config](https://npm.io/package/metro-config.md) 0.87.1
- [@babel/parser](https://npm.io/package/@babel/parser.md) ^7.29.0
- [metro-runtime](https://npm.io/package/metro-runtime.md) 0.87.1
- [metro-file-map](https://npm.io/package/metro-file-map.md) 0.87.1
- [metro-resolver](https://npm.io/package/metro-resolver.md) 0.87.1
- [@babel/template](https://npm.io/package/@babel/template.md) ^7.28.6
- [@babel/traverse](https://npm.io/package/@babel/traverse.md) ^7.29.0
- [lodash.throttle](https://npm.io/package/lodash.throttle.md) ^4.1.1
- [metro-cache-key](https://npm.io/package/metro-cache-key.md) 0.87.1
- [serialize-error](https://npm.io/package/serialize-error.md) ^2.1.0
- [@babel/generator](https://npm.io/package/@babel/generator.md) ^7.29.1
- [metro-source-map](https://npm.io/package/metro-source-map.md) 0.87.1
- [@babel/code-frame](https://npm.io/package/@babel/code-frame.md) ^7.29.0
- [metro-symbolicate](https://npm.io/package/metro-symbolicate.md) 0.87.1
- [error-stack-parser](https://npm.io/package/error-stack-parser.md) ^2.0.6
- [flow-enums-runtime](https://npm.io/package/flow-enums-runtime.md) ^0.0.6
- [metro-transform-worker](https://npm.io/package/metro-transform-worker.md) 0.87.1
- [metro-babel-transformer](https://npm.io/package/metro-babel-transformer.md) 0.87.1
- [metro-transform-plugins](https://npm.io/package/metro-transform-plugins.md) 0.87.1

## Recent versions

- 0.87.1 (latest) — 2026-09-13
- 0.84.6 (0.84-stable) — 2026-09-02
- 0.83.8 (0.83-stable) — 2026-08-19
- 0.81.5 (0.81-stable) — 2025-05-06
- 0.81.0-alpha.2 (alpha) — 2024-09-25
- 0.80.12 (0.80-stable) — 2024-09-08
- 0.76.9 (0.76-stable) — 2024-01-30
- 0.84.5 — 2026-08-19
- 0.87.0 — 2026-07-13
- 0.86.0 — 2026-07-06
- 0.85.0 — 2026-06-23
- 0.84.4 — 2026-04-30
- 0.83.7 — 2026-04-29
- 0.83.6 — 2026-04-13
- 0.84.3 — 2026-04-13
- … 175 more at https://npm.io/package/metro/versions

## README

# Metro

🚇 The JavaScript bundler for React Native.

- **🚅 Fast**: We aim for sub-second reload cycles, fast startup and quick bundling speeds.
- **⚖️ Scalable**: Works with thousands of modules in a single application.
- **⚛️ Integrated**: Supports every React Native project out of the box.

This project was previously part of the [react-native](https://github.com/facebook/react-native) repository. In this smaller repository it is easier for the team working on Metro to respond to both issues and pull requests. See [react-native#13976](https://github.com/facebook/react-native/issues/13976) for the initial announcement.

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