aab01608ba
Summary: * Adds parent tag as param for createNode in place of explicit appendChild commands. * Adds version info to bytecode * Adds native conditional support: Conditionals are represented in product code with the new `NativeConditional` React component. It takes params necessary to construct a native function call, and takes a render prop as a child that passes the value of the native call as an arg. In prod, the component would actually call the native module and render with that value, but in jest we render for *both* true and false and set them as children of a new jest-only primitive/host component which we special-case and generate a special command with `OP_CODE.conditional`, generate the appropriate bytecode commands for each branch, and embed them as args in the conditional OP_CODE command. When evaluating the bytecode, only one set of commands is executed, based on the native module value (which is evaluated with another new opcode which computes the value and stuffs it in a "register"). Obviously generating this bytecode is kind of a cludge compared to prepack, but when I asked @[501709947:Dominic] about it, he said they had no bytecode spec right now, so I'm running ahead with this prototype. The main thing I'm focused on is the C++/RN bytecode interpretter - this jest stuff is just a way to generate bytecode for it to consume which could be replaced or augmented with many other approaches, such as prepack, server rendering, etc. Also piggybacked a bunch of other cleanup. Reviewed By: shergin Differential Revision: D10277121 fbshipit-source-id: 15d3217a59ef481b574c742d17d8a7dc893cba90
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.