metro/react-packager/rn-babelrc.json

{
  "presets": [ "react-native" ],
  "plugins": []
}
Use "babel-preset-react-native" Summary: Rather than specifying Babel plugins in the `.babelrc` packaged with react-native, leverage a Babel preset to define the plugins (https://github.com/exponentjs/babel-preset-react-native). This allows for a much better user experience for those who want (or need) to override options in their project's `.babelrc`. Prior to this PR, if a user wanted to use a custom babel-plugin (or a custom set of babel plugins), they'd have either 1) manually override the `.babelrc` in the react-packager directory (or fork RN), or 2) specify a custom transformer to use when running the packager that loaded their own `.babelrc`. Note - the custom transformer was necessary because without it, RN's `.babelrc` options would supersede the options defined in the project's `.babelrc`...potentially causing issues with plugin ordering. This PR makes the transformer check for the existence of a project-level `.babelrc`, and if it it's there, it _doesn't_ use the react-native `.babelrc`. This prevents any oddities with Babel plug Closes https://github.com/facebook/react-native/pull/5214 Reviewed By: davidaurelio Differential Revision: D2881814 Pulled By: martinbigio fb-gh-sync-id: 4168144b7a365fae62bbeed094d8a03a48b4798c 2016-02-03 08:14:38 -08:00			`{`
			`"presets": [ "react-native" ],`
			`"plugins": []`
			`}`