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Tim Yung 320963c7cb RN: Enable Hermes Parser in Default Metro Config (#46318 )

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/46318

Configures the Metro by default to use the Hermes parser so that React Native can fully leverage all modern Flow language syntax.

NOTE: This does not affect `*.ts` and `*.tsx` files which will continue to use Babel. Metro has logic to enforce this regardless of the transform options.

Changelog:
[General][Changed] - Changed Metro default config to use Hermes parser, enabling the use of advanced Flow syntax in React Native.

Reviewed By: robhogan

Differential Revision: D62161923

fbshipit-source-id: 0f4c069d429517be16abcc6a2187cd23c6bd52d4

2024-09-04 11:04:32 -07:00

src

RN: Enable Hermes Parser in Default Metro Config (#46318 )

2024-09-04 11:04:32 -07:00

.gitignore

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

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

package.json

update metro version in react-native (#46264 )

2024-08-30 05:26:34 -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.