Danny Su
fb0e4ee6d1
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/52651 Changelog: [Internal] Last year the `hermes-canary` profile was used to enable certain apps to use Static Hermes by enabling regenerator because debugger support for generator wasn't finished yet. However, we actually could have just keyed off of `options.dev` and still kept using `hermes-stable`. The `hermes-canary` profile is actually meant to be used to run experiments. We should free up this profile to return it to the original intended purpose. This diff makes all hermes profiles' dev mode use regenerator. Existing SH apps using `hermes-canary` should be unaffected. And apps using Hermes will change to use regenerator in dev mode, but that should be ok. Reviewed By: robhogan Differential Revision: D78450695 fbshipit-source-id: eb6a87fbc1f0e08d490fd0d1baa3611248f95764
@react-native/babel-preset
Babel presets for React Native applications. React Native itself uses this Babel preset by default when transforming your app's source code.
If you wish to use a custom Babel configuration by writing a babel.config.js file in your project's root directory, you must specify all the plugins necessary to transform your code. React Native does not apply its default Babel configuration in this case. So, to make your life easier, you can use this preset to get the default configuration and then specify more plugins that run before it.
Usage
As mentioned above, you only need to use this preset if you are writing a custom babel.config.js file.
Installation
Install @react-native/babel-preset in your app:
with npm:
npm i @react-native/babel-preset --save-dev
or with yarn:
yarn add -D @react-native/babel-preset
Configuring Babel
Then, create a file called babel.config.js in your project's root directory. The existence of this babel.config.js file will tell React Native to use your custom Babel configuration instead of its own. Then load this preset:
{
"presets": ["module:@react-native/babel-preset"]
}
You can further customize your Babel configuration by specifying plugins and other options. See Babel's babel.config.js documentation to learn more.
Help and Support
If you get stuck configuring Babel, please ask a question on Stack Overflow or find a consultant for help. If you discover a bug, please open up an issue.