metro-core

npmv0.87.0TypeScript

🚇 Metro's core package.

Safe to adopt

Yes — metro-core scores well across adoption, maintenance, weight, supply chain, and licensing. 11.8M downloads per week and 5 known dependents. Last published 58 days ago. 34 releases in the last 2 years.

AAdoption: grade A, Excellent.
11.8M downloads per week and 5 known dependents.
AMaintenance: grade A, Excellent.
Last published 58 days ago. 34 releases in the last 2 years.
AWeight: grade A, Excellent.
Pulls in 3 transitive packages, about 192 KB installed.
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-core to a project.

Direct dependencies

Runtime packages this one declares itself.

Total installed

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

192 KB

Install size

Unpacked size of this package plus its entire runtime tree.

Tree depth

Longest resolved dependency chain below this package.

Licenses in the dependency tree

MIT

Every license you inherit by installing metro-core, 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-core v0.87.0. Runtime dependencies are installed with the package; dev dependencies are not.

Runtime (3)

flow-enums-runtime ^0.0.6 lodash.throttle ^4.1.1 metro-resolver 0.87.0

Used by

Popular packages that depend on metro-core.

@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

metronpm

🚇 The JavaScript bundler for React Native.

↓ 0/wk◈ 6 dependents⚖ MITTS

metro-cachenpm

🚇 Cache layers for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS

metro-confignpm

🚇 Config parser for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS

Relationship graph

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

metro-core dependencies dependents

Frequently installed together

metronpm

🚇 The JavaScript bundler for React Native.

↓ 0/wk◈ 6 dependents⚖ MITTS

metro-resolvernpm

🚇 Implementation of Metro's resolution logic.

↓ 0/wk◈ 4 dependents⚖ MITTS

metro-confignpm

🚇 Config parser for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS

metro-cachenpm

🚇 Cache layers for Metro.

↓ 0/wk◈ 4 dependents⚖ MITTS

metro-runtimenpm

🚇 Module required for evaluating Metro bundles.

↓ 0/wk◈ 5 dependents⚖ MIT

metro-file-mapnpm

[Experimental] - 🚇 File crawling, watching and mapping for Metro

↓ 0/wk◈ 2 dependents⚖ MITTS

debugnpm

Lightweight debugging utility for Node.js and the browser

↓ 0/wk◈ 46 dependents⚖ MIT

metro-symbolicatenpm

🚇 A tool to find the source location from JS bundles and stack traces.

↓ 0/wk◈ 3 dependents⚖ MITTS

metro-source-mapnpm

🚇 Source map generator for Metro.

↓ 0/wk◈ 5 dependents⚖ MITTS

metro-transform-workernpm

🚇 Transform worker for Metro.

↓ 0/wk◈ 2 dependents⚖ MITTS

metro-babel-transformernpm

🚇 Base Babel transformer for Metro.

↓ 0/wk◈ 3 dependents⚖ MITTS

invariantnpm

invariant

↓ 0/wk◈ 16 dependents⚖ MIT

Release history

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

Recent versions of metro-core
Version	Published	Size	License
0.84.6	7 days ago	35 KB	MIT
0.84.5	21 days ago	35 KB	MIT
0.83.8	21 days ago	35 KB	MIT
0.87.0latest	1 month ago	34 KB	MIT
0.86.0	2 months ago	34 KB	MIT
0.85.0	2 months ago	35 KB	MIT
0.84.4	4 months ago	35 KB	MIT
0.83.7	4 months ago	35 KB	MIT
0.83.6	4 months ago	35 KB	MIT
0.84.3	4 months ago	35 KB	MIT
0.83.5	6 months ago	33 KB	MIT
0.84.2	6 months ago	35 KB	MIT
0.84.1	6 months ago	26 KB	MIT
0.84.0	6 months ago	26 KB	MIT
0.83.4	6 months ago	26 KB	MIT

Overview

metro-core is an npm package that 🚇 Metro's core package. It is extremely widely used, with about 11.8M downloads per week and 5 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 🚇 Metro's core package and value a battle-tested, widely-adopted solution.

When not to use it

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

Pros

Large, well-established user base (11.8M weekly downloads).
Ships TypeScript type definitions.
Clear open-source license (MIT).
Lean dependency tree (3 direct dependencies).

Cons

No significant drawbacks detected from available metadata.

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

Maintainers

fb metro-bot

Frequently asked questions

Should I use metro-core?

How do I install metro-core?

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

How many dependencies does metro-core have?

metro-core declares 3 direct dependencies and pulls in 3 packages in total once its runtime tree is resolved totalling about 192 KB on disk.

What license is metro-core released under?

metro-core is distributed under the MIT license.

How popular is metro-core?

metro-core has approximately 11,806,087 downloads per week and 5 known dependent packages.

Is metro-core still maintained?

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

Does metro-core run install scripts?

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