57041ee44f
Summary: This PR is a WIP for adding tests for out-of-tree platform support. [I originally had issues](https://github.com/facebook/react-native/pull/20825#issuecomment-416433611) with this, so I want to give it a try in a separate pull request. None of these issues appear on my machine while running these tests as of this rebase - if everything seems okay on CircleCI after this rebase against `master`, I will ditch the [WIP] tag. Otherwise, I will see if I can find a way to make this work. The bunch of JS files that will give this a "Large PR" tag are in `RNTester/js/OutOfTreeTestPlatform` - they are only used by the bundler and not executed at any point in time. So if another file needs to be added when React Native's module structure changes, you do not need to have a functional JS file in there as a stub. `module.exports` could be `null` if you wanted. I just had copied over stubs from `Libraries` because I wanted a non-trivial haste module map to be in the test. Pull Request resolved: https://github.com/facebook/react-native/pull/20932 Reviewed By: axe-fb Differential Revision: D9818112 Pulled By: hramos fbshipit-source-id: 0b53359b84430fdefb972587c95d19f85773c5fa
React Native · 
Learn once, write anywhere: Build mobile apps with React.
See the official React Native website for an introduction to React Native.
Requirements
Supported target operating systems are >= Android 4.1 (API 16) and >= iOS 9.0. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS by default (tools like Expo can be used to get around this).
Building your first React Native app
Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:
How React Native works
React Native lets you build mobile apps using JavaScript. It uses the same design as React, letting you compose a rich mobile UI from declarative components.
With React Native, you don't build a "mobile web app", an "HTML5 app", or a "hybrid app". You build a real mobile app that's indistinguishable from an app built using Objective-C, Java, Kotlin, or Swift. React Native uses the same fundamental UI building blocks as regular iOS and Android apps. You just put those building blocks together using JavaScript and React.
React Native lets you build your app faster. Instead of recompiling, you can reload your app instantly. With hot reloading, you can even run new code while retaining your application state.
React Native combines smoothly with components written in Objective-C, Java, Kotlin, or Swift. It's simple to drop down to native code if you need to optimize a few aspects of your application. It's also easy to build part of your app in React Native, and part of your app using native code directly - that's how the Facebook app works.
The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.
Full documentation
The full documentation for React Native can be found on our website. The source for the React Native documentation and website is hosted on a separate repo, https://github.com/facebook/react-native-website.
The React Native documentation only discusses the components, APIs, and topics specific to React Native (React on iOS and Android). For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.
Join the React Native community
- Website: https://facebook.github.io/react-native
- Twitter: https://twitter.com/reactnative
- Discussion: https://discuss.reactjs.org/
See the CONTRIBUTING file for how to help out.
License
React Native is MIT licensed, as found in the LICENSE file.
React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.