194092e729
Summary:
Turns out, even after discussion that was had in https://github.com/facebook/react-native/pull/5294#issuecomment-174397103, we really do need this transform.
I've just included it in the preset...let me know if you all would rather publish to npm.
The actual reason why this is necessary is because in the latest sync from FB, fbjs was updated to use the `Symbol.iterator` express in it's isEmpty function: 064a484e18
We use this in RN in the ListView...and this change (once #5084 is merged) will cause ListView to break on older JSC context's.
This resolves that, and is probably something we should have had all along.
Closes https://github.com/facebook/react-native/pull/5824
Reviewed By: svcscm
Differential Revision: D2913315
Pulled By: vjeux
fb-gh-sync-id: abaf484a9431b3111e8118d01db8d2c0d2dd73ca
shipit-source-id: abaf484a9431b3111e8118d01db8d2c0d2dd73ca
babel-preset-react-native
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 .babelrc 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 .babelrc file.
Installation
Install babel-preset-react-native in your app:
npm i babel-preset-react-native --save-dev
Configuring Babel
Then, create a file called .babelrc in your project's root directory. The existence of this .babelrc file will tell React Native to use your custom Babel configuration instead of its own. Then load this preset:
{
"presets": ["react-native"]
}
You can further customize your Babel configuration by specifying plugins and other options. See Babel's .babelrc 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.