Jorge Cabiedes Acosta 9526406fc2 Fix crash with nested FlatLists and fix edge case with nested views (#50855)
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/50855

This diff addresses a crash caused by view duplication in React Native Android. The issue occurred when a view was not already clipped and was laid out again, resulting in duplicated views.

This problem was particularly noticeable when using nested FlatLists, which triggered a custom focus search with an incomplete and buggy duplicated FlatList container view.

The fix involves preventing the duplication of views by checking if a view is clipped already before laying it out again. Additionally, this diff includes two other improvements:
- Preventing clipping issues: When a view is nested within a non-ReactClippingViewGroup ancestor, focus searching would fail due to the needUpdateClippingRecursive logic only running on instances of ReactClippingViewGroup. By excluding these ancestors, we ensure that the next focusable view can be properly excluded from being clipped.
- Minor fix: A minor fix was made to prevent potential issues in deeply nested cases.
- Add a Kill switch with a feature flag and mobile config combo.

Reviewed By: joevilches

Differential Revision: D73471780

fbshipit-source-id: efbb968600f21b24ab1fa32222d555f346fb336e
2025-04-25 13:01:31 -07:00
2025-04-03 16:13:09 -07:00
2025-02-27 03:13:26 -08:00
2025-04-16 12:54:38 -07:00
2023-09-12 09:21:08 -07:00
2025-02-27 03:13:26 -08:00
2025-02-27 03:13:26 -08:00

React Native

Learn once, write anywhere:
Build mobile apps with React.

React Native is released under the MIT license. Current npm package version. PRs welcome! Follow @reactnative

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

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.

Languages
C++ 33%
Kotlin 20%
JavaScript 18.6%
Objective-C++ 11.5%
Objective-C 7.1%
Other 9.7%