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Rob Hogan fe2bcbf4ba Community CLI: Don't clobber user config of Metro resolver/serializer, expose CLI config to user as defaults (#51836 )

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51836

Currently, `community-cli-plugin` loads the user config and then overrides parts of it - specifically `resolver.resolveRequest` and `serializer.getModulesRunBeforeMainModule`, making it impossible for a user to modify this config.

Instead, treat the CLI's resolver and serializer customisations as "Framework defaults", layered on top of `react-native/metro-config` defaults but beneath a user's `metro.config.js`.

This allows the user to obtain (via `react-native/metro-config`'s `getDefaultConfig`) and extend or override them, if they need to.

This is technically breaking because users who currently have a custom `resolveRequest` or `getModulesRunBeforeMainModule` in their `metro.config.js` will have that config respected from this change, whereas currently they won't have any effect.

Changelog:
[General][Breaking] Community CLI users: user-defined `resolver.resolveRequest` and `serializer.getModulesRunBeforeMainModule` Metro config now takes precedence over CLI defaults

Reviewed By: huntie

Differential Revision: D74811395

fbshipit-source-id: c250caf798fdaedb0822bea3d6e65c0c3ae4d691

2025-06-09 07:44:02 -07:00

src

Community CLI: Don't clobber user config of Metro resolver/serializer, expose CLI config to user as defaults (#51836 )

2025-06-09 07:44:02 -07:00

.gitignore

Move metro-config package into monorepo build, enable TS generation (#41836 )

2024-02-12 05:20:38 -08:00

package.json

Bump minimum Node.js version to 22.14.0 (#51840 )

2025-06-06 05:21:39 -07:00

README.md

Move react-native-babel-transformer and react-native-babel-preset from Metro to React Native repo (#38228 )

2023-07-27 11:48:16 -07:00

README.md

@react-native/metro-config

Installation

yarn add --dev @react-native/js-polyfills metro-config @react-native/metro-babel-transformer metro-runtime @react-native/metro-config

Note: We're using yarn to install deps. Feel free to change commands to use npm 3+ and npx if you like

Testing

To run the tests in this package, run the following commands from the React Native root folder:

yarn to install the dependencies. You just need to run this once
yarn jest packages/metro-config.