</>PackageGraphPackageGraph

metro

npmv0.87.0TypeScript

🚇 The JavaScript bundler for React Native.

Adopt with care

metro is usable, with caveats. Pulls in 120 transitive packages, about 17 MB installed (at least — some of the tree is still being crawled).

  • ?Adoption: grade ?, Not reported by this registry.

    No download data reported for this package yet.

  • AMaintenance: grade A, Excellent.

    Last published 58 days ago. 34 releases in the last 2 years.

  • DWeight: grade D, Poor — a real concern.

    Pulls in 120 transitive packages, about 17 MB installed (at least — some of the tree is still being crawled).

  • ASupply chain: grade A, Excellent.

    No install scripts, 2 maintainers, and a contained dependency surface.

  • ALicense: grade A, Excellent.

    MIT — permissive, with no copyleft found in the dependency tree.

Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.

Install cost

What you actually take on by adding metro to a project.

39
Direct dependencies

Runtime packages this one declares itself.

120
Total installed

Distinct packages in the full runtime tree, deduplicated the way a package manager would.

17 MB
Install size

Unpacked size of this package plus its entire runtime tree.

5
Tree depth

Longest resolved dependency chain below this package.

Part of this dependency tree has not been crawled yet, so these figures are a lower bound rather than a final total.

Licenses in the dependency tree

(MIT OR CC0-1.0)0BSDApache-2.0BSD-3-ClauseISCMIT

Every license you inherit by installing metro, not just its own. Check this before a legal review, not after.

Compatibility

Node.js
node ^22.13.0 || ^24.3.0 || >= 26.0.0
Module format
CommonJS only
TypeScript
Types included
Install scripts
None

Dependencies

Declared by metro v0.87.0. Runtime dependencies are installed with the package; dev dependencies are not.

Runtime (39)

@babel/code-frame ^7.29.0@babel/core ^7.25.2@babel/generator ^7.29.1@babel/parser ^7.29.0@babel/template ^7.28.6@babel/traverse ^7.29.0@babel/types ^7.29.0accepts ^2.0.0ci-info ^2.0.0connect ^3.6.5debug ^4.4.0error-stack-parser ^2.0.6flow-enums-runtime ^0.0.6graceful-fs ^4.2.4hermes-parser 0.36.1image-size ^1.0.2invariant ^2.2.4jest-worker ^29.7.0jsc-safe-url ^0.2.2lodash.throttle ^4.1.1metro-babel-transformer 0.87.0metro-cache 0.87.0metro-cache-key 0.87.0metro-config 0.87.0metro-core 0.87.0metro-file-map 0.87.0metro-resolver 0.87.0metro-runtime 0.87.0metro-source-map 0.87.0metro-symbolicate 0.87.0metro-transform-plugins 0.87.0metro-transform-worker 0.87.0mime-types ^3.0.1nullthrows ^1.1.1serialize-error ^2.1.0source-map ^0.5.6throat ^5.0.0ws ^7.5.10yargs ^17.6.2

Dev (17)

@babel/plugin-transform-flow-strip-types ^7.25.2@babel/plugin-transform-modules-commonjs ^7.24.8@babel/plugin-transform-runtime ^7.24.7@react-native/babel-preset 0.78.0@react-native/metro-babel-transformer 0.78.0@types/ws ^7.4.7@types/yargs ^17.0.35babel-jest ^29.7.0dedent ^0.7.0jest-snapshot ^29.7.0jest-snapshot-serializer-raw ^1.2.0metro-babel-register 0.87.0metro-memory-fs *mock-req ^0.2.0mock-res ^0.6.0selfsigned ^5.5.0stack-trace ^0.0.10

Used by

Popular packages that depend on metro.

@expo/metronpm

Generated and versioned meta-package wrapping Metro

↓ 0/wk◈ 5 dependents⚖ MIT
@react-native/community-cli-pluginnpm

Core CLI commands for React Native

↓ 0/wk◈ 1 dependents⚖ MIT
metro-resolvernpm

🚇 Implementation of Metro's resolution logic.

↓ 0/wk◈ 4 dependents⚖ MITTS
metro-transform-workernpm

🚇 Transform worker for Metro.

↓ 0/wk◈ 2 dependents⚖ MITTS
metro-confignpm

🚇 Config parser for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS
metro-transform-pluginsnpm

🚇 Transform plugins for Metro.

↓ 0/wk◈ 3 dependents⚖ MITTS

Relationship graph

Dependencies (left) and dependents (right) of metro.

throatsource-mapmetro-file-mapserialize-error@babel/code-frameconnectinvariantmime-typesjest-workermetro-resolvergraceful-fsmetro-cache@babel/typesmetro-runtimemetro-babel-trans…debugmetro-config@babel/templateci-infometro-core@expo/metro@react-native/com…metro-transform-w…metro-transform-p…metro
metro dependencies dependents

Frequently installed together

metro-resolvernpm

🚇 Implementation of Metro's resolution logic.

↓ 0/wk◈ 4 dependents⚖ MITTS
metro-corenpm

🚇 Metro's core package.

↓ 11.8M/wk◈ 5 dependents⚖ MITTS
metro-confignpm

🚇 Config parser for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS
@react-native/metro-confignpm

Metro configuration for React Native.

↓ 4.4M/wk◈ 6 dependents⚖ MIT
@react-native-community/clinpm

React Native CLI

↓ 0/wk◈ 3 dependents⚖ MITTS
@react-native/dev-middlewarenpm

Dev server middleware for React Native

↓ 0/wk◈ 2 dependents⚖ MIT
semvernpm

The semantic version parser used by npm.

↓ 0/wk◈ 55 dependents⚖ ISC
invariantnpm

invariant

↓ 0/wk◈ 16 dependents⚖ MIT
debugnpm

Lightweight debugging utility for Node.js and the browser

↓ 0/wk◈ 46 dependents⚖ MIT
metro-cachenpm

🚇 Cache layers for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS
metro-source-mapnpm

🚇 Source map generator for Metro.

↓ 0/wk◈ 5 dependents⚖ MITTS
metro-babel-transformernpm

🚇 Base Babel transformer for Metro.

↓ 0/wk◈ 3 dependents⚖ MITTS

Release history

30 releases in the last two years, typically about 11 days apart.

Recent versions of metro
VersionPublishedSizeLicense
0.84.67 days ago936 KBMIT
0.84.521 days ago936 KBMIT
0.83.821 days ago936 KBMIT
0.87.0latest1 month ago855 KBMIT
0.86.02 months ago892 KBMIT
0.85.02 months ago892 KBMIT
0.84.44 months ago908 KBMIT
0.83.74 months ago908 KBMIT
0.83.64 months ago900 KBMIT
0.84.34 months ago900 KBMIT
0.83.56 months ago872 KBMIT
0.84.26 months ago901 KBMIT
0.84.16 months ago757 KBMIT
0.84.06 months ago755 KBMIT
0.83.46 months ago754 KBMIT

Overview

metro is an npm package that 🚇 The JavaScript bundler for React Native. It has 6 known dependents in the graph. The latest version is 0.87.0, released under the MIT license.

Who should use it

Teams working in the npm ecosystem who need 🚇 The JavaScript bundler for React Native and value a focused solution.

When not to use it

Consider an alternative if you need to minimize your dependency tree, or if a more actively-maintained option better fits your npm stack.

Pros

  • Ships TypeScript type definitions.
  • Clear open-source license (MIT).

Cons

  • Large dependency tree (56 direct dependencies) increases install size and audit surface.

Auto-generated from collected registry metadata. No external claims are inferred.

Maintainers

fbmetro-bot

Frequently asked questions

Should I use metro?

metro is usable, with caveats. Pulls in 120 transitive packages, about 17 MB installed (at least — some of the tree is still being crawled).

How do I install metro?

Run `npm install metro` to add metro to your npm project.

How many dependencies does metro have?

metro declares 56 direct dependencies and pulls in 120 packages in total once its runtime tree is resolved totalling about 17 MB on disk.

What license is metro released under?

metro is distributed under the MIT license. Its dependency tree also includes: (MIT OR CC0-1.0), 0BSD, Apache-2.0, BSD-3-Clause, ISC, MIT.

How popular is metro?

npm does not publish download counts. Within PackageGraph's crawl, 6 known packages depend on metro.

Is metro still maintained?

The most recent release of metro (v0.87.0) was published 1 month ago.

Does metro run install scripts?

No. metro does not define preinstall, install, or postinstall scripts, so installing it does not execute publisher-supplied code.