ca106043fc
Summary: <!-- Thank you for sending the PR! We appreciate you spending the time to work on these changes. Help us understand your motivation by explaining why you decided to make this change. You can learn more about contributing to React Native here: http://facebook.github.io/react-native/docs/contributing.html Happy contributing! --> The react-native local-cli does a check to see if it is being run from a global install or not. If running from a global install, an error is printed and the CLI exits. This check for a global install does not work on Windows. The check of `process.argv` does not contain the expected `node_modules/.bin/react-native`. It instead contains a direct path to the `wrong-react-native.js` file, as determined by the `node_modules/.bin/react-native.cmd` entry point. This update will, on Windows platforms, do a global check by instead looking for the existence of a package.json above the node_modules. If not found, we assume a global install and print the error. In a react-native project, I originally tried running the local react-native cli: ``` > yarn react-native --version yarn run v1.3.2 $ E:\myproject\node_modules\.bin\react-native --version Looks like you installed react-native globally, maybe you meant react-native-cli? To fix the issue, run: npm uninstall -g react-native npm install -g react-native-cli error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command. ``` I replaced the `wrong-react-native.js` with the modified version and reran the command: ``` > yarn react-native --version yarn run v1.3.2 $ E:\myproject\node_modules\.bin\react-native --version Scanning folders for symlinks in E:\myproject\node_modules (93ms) 0.50.3 Done in 1.86s. ``` <!-- Help reviewers and the release process by writing your own release notes **INTERNAL and MINOR tagged notes will not be included in the next version's final release notes.** CATEGORY [----------] TYPE [ CLI ] [-------------] LOCATION [ DOCS ] [ BREAKING ] [-------------] [ GENERAL ] [ BUGFIX ] [-{Component}-] [ INTERNAL ] [ ENHANCEMENT ] [ {File} ] [ IOS ] [ FEATURE ] [ {Directory} ] |-----------| [ ANDROID ] [ MINOR ] [ {Framework} ] - | {Message} | [----------] [-------------] [-------------] |-----------| [CATEGORY] [TYPE] [LOCATION] - MESSAGE EXAMPLES: [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see --> [CLI] [BUGFIX] [local-cli/wrong-react-native.js] - Updated local-cli on Windows to check for the absence of a package.json file to determine if being run from a global installation or not. Closes https://github.com/facebook/react-native/pull/17036 Differential Revision: D6471925 Pulled By: TheSavior fbshipit-source-id: cc5560d1c102d05f378e5ae537f13d31b5343045
React Native · 
Learn once, write anywhere: Build mobile apps with React.
- Build native mobile apps using JavaScript and React: React Native lets you build mobile apps using only JavaScript. It uses the same design as React, letting you compose a rich mobile UI from declarative components.
- A React Native app is a real mobile app: 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, 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.
- Don't waste time recompiling: 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. Give it a try - it's a magical experience.
- Use native code when you need to: React Native combines smoothly with components written in Objective-C, Java, 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.
See the official React Native website for an introduction to React Native.
Supported operating systems are >= Android 4.1 (API 16) and >= iOS 8.0.
Getting Started
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:
Documentation
The website’s documentation is divided into multiple sections.
- There are Guides that discuss topics like debugging, integrating with existing apps, and the gesture responder system.
- The Components section covers React components such as
ViewandButton. - The APIs section covers other libraries like Animated and StyleSheet that aren’t React components themselves.
- Finally, React Native provides a small number of Polyfills that offer web-like APIs.
Another great way to learn more about the components and APIs included with React Native is to read their source. Look under the Libraries/Components directory for components like ScrollView and TextInput, for example. The RNTester example is also here to demonstrate some of the ways to use these components. From the source you can get an accurate understanding of each component’s behavior and API.
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.
Upgrading
React Native is under active development. See the guide on upgrading React Native to keep your project up-to-date.
Contributing
Read below to learn how you can take part in improving React Native.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our contributing guide to learn about our development process, how to propose bug fixes and improvements, and how to build and test your changes to React Native.
Beginner Friendly Bugs
We have a list of beginner friendly issues to help you get your feet wet in the React Native codebase and familiar with our contribution process. This is a great place to get started.
License
React Native is BSD licensed. We also provide an additional patent grant.
React Native documentation is Creative Commons licensed.
