Panos Vekris
2a068c6559
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/51488 The Flow team is improving the way Flow infers type for primitive literals. Announcement: https://fb.workplace.com/groups/flowlang/permalink/1725180268087629/ This diff prepares the codebase for the new behavior by codemoding `as const` annotations. ## Repro steps 1/ Used steps in D73610163 to produce the code changes. 2/ Reverted files where `flow` errored: ``` flow status --show-all-errors > errors.log node ~/fbsource/fbcode/flow/facebook/error-analyzer.js errors.log | awk -F':' '{ print $1 }' | sort -u | grep -v 'Total Error Count' | xargs hg revert --rev . ``` 3/ Reverted files that did not improve error count in new Flow mode ``` # Run Flow before change ~/fbsource/fbcode/flow/facebook/flowd status --show-all-errors > errors-0.log # Run Flow after change ~/fbsource/fbcode/flow/facebook/flowd status --show-all-errors > errors-1.log # Compute error counts before and after node ~/fbsource/fbcode/flow/facebook/error-analyzer.js errors-0.log | sort > errors-counts-0.log node ~/fbsource/fbcode/flow/facebook/error-analyzer.js errors-1.log | sort > errors-counts-1.log # Revert files with no change in error count comm -12 errors-counts-0.log errors-counts-1.log | awk -F':' '{ print $1 }' | xargs hg revert --rev .~1 ``` ## Note to code owners Due to the large number of errors involved in this rollout, adding `as const` was the most feasible large-scale automated solution. Ideally, a lot of these errors would be fixed by adding other appropriate type annotations. For example instead of annotating ``` type Shape = {type: 'circle', radius: number} | {type: 'square', side: number} | ...; type ShapeKind = 'circle' | 'square' | 'triangle'; const circle = { type: "circle" as const, // <-- annotation added here radius: 42, }; shape.type as ShapeKind; takesShape(circle); ``` a more appropriate annotation would be ``` const circle: Circle = { type: "circle"; radius: 42 }; ... ``` Changelog: [Internal] drop-conflicts Reviewed By: SamChou19815 Differential Revision: D75114154 fbshipit-source-id: 67ee5673816da9625431e2a2466a1e0038386151
React Native
Learn once, write anywhere:
Build mobile apps with React.
Getting Started · Learn the Basics · Showcase · Contribute · Community · Support
React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
- Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
- Component-Based. Build encapsulated components that manage their state, then compose them to make complex UIs.
- Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
- Portability. Reuse code across iOS, Android, and other platforms.
React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.
Contents
- Requirements
- Building your first React Native app
- Documentation
- Upgrading
- How to Contribute
- Code of Conduct
- License
📋 Requirements
React Native apps may target iOS 15.1 and Android 7.0 (API 24) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work 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:
📖 Documentation
The full documentation for React Native can be found on our website.
The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.
The source for the React Native documentation and website is hosted on a separate repository, @facebook/react-native-website.
🚀 Upgrading
Upgrading to new versions of React Native may give you access to more APIs, views, developer tools, and other goodies. See the Upgrading Guide for instructions.
React Native releases are discussed in this discussion repo.
👏 How to Contribute
The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bug fixes and improvements. 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 bugfixes and improvements, and how to build and test your changes to React Native.
Open Source Roadmap
You can learn more about our vision for React Native in the Roadmap.
Good First Issues
We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
Discussions
Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.
📄 License
React Native is MIT licensed, as found in the LICENSE file.