e6057095ad
Summary: Currently, the `TextInput's` placeholder is always sized as though `allowFontScaling` is `true`. Note that `allowFontScaling` works fine for the content of the `TextInput`. The reason is that we set the font size in two places: in the shadow node and in the Android view. The shadow node logic determines the size of the content and the Android view logic determines the size of the placeholder. The handler for the `allowFontScaling` prop is only present in the shadow node logic. Consequently, the Android view logic always uses the default value of `true` for the `allowFontScaling` prop. The fix is to add logic for handling the `allowFontScaling` prop to the Android view. It would be great if we could handle all text props in one spot instead of duplicating code between the shadow node and the Android view. That would eliminate this whole class of bugs. However, I don't have enough familiarity with the history of this code to know how hard that would be or if it's even possible. Fixes #18827. Pull Request resolved: https://github.com/facebook/react-native/pull/22992 Differential Revision: D13671400 Pulled By: cpojer fbshipit-source-id: 40bae3cfb0ca6298e91a81c05211538935f5a0e8
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. You can learn more about our open source roadmap in this blog post: Open Source Roadmap.
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. Releases are discussed in the React Native Community, https://github.com/react-native-community/react-native-releases, and larger discussions and proposals are in https://github.com/react-native-community/discussions-and-proposals.
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
- Help: https://facebook.github.io/react-native/en/help
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.