[0.77.1] minimumFontScale doesn't work in New Arch
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Description
Description
Text props minimumFontScale doesn't work
Steps to reproduce
- Install default app (npx @react-native-community/cli@latest init AwesomeProject)
- Wrap Text to small View (width:100, height:100)
- Add large text into text component
- Set text props ( adjustsFontSizeToFit={true}
minimumFontScale={0.9}
numberOfLines={1} ) - See result, text are small
React Native Version
0.77.1
Affected Platforms
Runtime - Android, Runtime - iOS
Areas
Fabric - The New Renderer
Output of npx @react-native-community/cli info
System:
OS: macOS 15.1.1
CPU: (12) arm64 Apple M3 Pro
Memory: 238.53 MB / 18.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 22.11.0
path: ~/.nvm/versions/node/v22.11.0/bin/node
Yarn: Not Found
npm:
version: 10.9.0
path: ~/.nvm/versions/node/v22.11.0/bin/npm
Watchman:
version: 2024.12.02.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.16.2
path: /opt/homebrew/opt/ruby/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 24.1
- iOS 18.1
- macOS 15.1
- tvOS 18.1
- visionOS 2.1
- watchOS 11.1
Android SDK:
API Levels:
- "33"
- "34"
- "35"
Build Tools:
- 30.0.3
- 33.0.0
- 33.0.1
- 34.0.0
- 35.0.0
System Images:
- android-27 | ARM 64 v8a
- android-35 | Google Play ARM 64 v8a
Android NDK: Not Found
IDEs:
Android Studio: 2024.3 AI-243.22562.218.2431.13114758
Xcode:
version: 16.1/16B40
path: /usr/bin/xcodebuild
Languages:
Java:
version: 17.0.13
path: /usr/bin/javac
Ruby:
version: 3.3.6
path: /opt/homebrew/opt/ruby/bin/ruby
npmPackages:
"@react-native-community/cli":
installed: 15.1.3
wanted: 15.1.3
react:
installed: 18.3.1
wanted: 18.3.1
react-native:
installed: 0.77.1
wanted: ^0.77.1
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: true
newArchEnabled: true
iOS:
hermesEnabled: true
newArchEnabled: true
Stacktrace or Logs
-
Reproducer
https://snack.expo.dev/t1eb6mkjQgY6fAFeXjhPK
Screenshots and Videos
import { Text, SafeAreaView, StyleSheet, View } from 'react-native';
export default function App() {
return (
<SafeAreaView style={styles.container}>
<View style={styles.wrapper}>
<Text style={styles.paragraph}
adjustsFontSizeToFit={true}
minimumFontScale={0.9}
numberOfLines={1} >
Change code in the editor and watch it change on your phone! Save to get a shareable url.
</Text>
</View>
</SafeAreaView>
);
}
const styles = StyleSheet.create({
wrapper:{
width:100,
height:100,
backgroundColor:'yellow'
},
container: {
flex: 1,
justifyContent: 'center',
backgroundColor: '#ecf0f1',
padding: 8,
alignItems:'center'
},
paragraph: {
margin: 24,
fontSize: 18,
fontWeight: 'bold',
textAlign: 'center',
},
});
Patch for fix (based on https://github.com/facebook/react-native/pull/43543)
react-native+0.77.1.patch
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the linked Snack reproducer on Android and iOS with New Architecture enabled, then compare the attached react-native+0.77.1.patch with pull request #43543. Verify the behavior for adjustsFontSizeToFit, minimumFontScale, and numberOfLines. Done means the reported text no longer shrinks below the configured minimumFontScale on both platforms.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- react-native
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100