Moti Zilberman
cc34acefab
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/42747 Changelog: [Internal] Implements a `RuntimeAgent` (D51231326) for Hermes for the modern CDP backend, based on the `CDPHandler` API that Hermes exposes currently. ## A note on `console` We unfortunately have to disable `console` interception (D51234334 / equivalently D52971652) because `CDPHandler`'s current implementation is not aligned with the Agent concept: * Agents are only created once a session has started, but the `console` interceptor needs to be injected at VM startup. * Agents should not clobber each other's shared state (nor consume excessive resources per Agent), but each `CDPHandler` would install its own independent `console` interceptor if enabled. We will enable CDP `console` support in the modern backend in future work. This will require either some additional plumbing in RN (e.g. to safely access JSI from an Agent/Target) or some additional work in Hermes. ## Conditional compilation based on `HERMES_ENABLE_DEBUGGER` `HermesRuntimeAgent.cpp` compiles both with and without `-DHERMES_ENABLE_DEBUGGER`, which is the flag Hermes uses to control the availability of `CDPHandler` (and its containing Buck library). If the debugger is not enabled, `HermesRuntimeAgent` reduces to a `FallbackRuntimeAgent`. In either case, no Hermes debugger headers leak into `HermesRuntimeAgent.h`, so callers don't need to check `#ifdef HERMES_ENABLE_DEBUGGER`, and the overall CDP backend infra is not gated on whether the Hermes debugger is compiled in. Reviewed By: huntie Differential Revision: D51234333 fbshipit-source-id: ccbca443560308c5edba4b9689501d01059fdd94
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 13.4 and Android 6.0 (API 23) 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 repo, @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.
React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.