react / react/react-native

Different TextInput behavior with flex-basis:0

Open
#38,517 0 comments 1 reaction 0 assignees View on GitHub

Nobody has claimed this yet.

Component: TextInput Issue: Author Provided Repro Needs: Triage :mag:
Dominant language
C++
Stars
127k
Forks
25.3k
Avg merge
1d 23h
Merged PRs (30d)
4

Description

Description

Android and IOS exhibit different behaviors in the following scenario: a textInput with a thick border and flex:1, within a view with flex:1.

On Android, the border is not taken into account to determine the size to allot to the textInput.

Possibly related to https://github.com/facebook/react-native/issues/38518

React Native Version

0.72.3

Output of npx react-native info

System:
OS: Windows 10 10.0.19045
CPU: (32) x64 AMD Ryzen Threadripper PRO 3955WX 16-Cores
Memory: 92.13 GB / 127.86 GB
Binaries:
Node:
version: 20.4.0
path: C:\Program Files\nodejs\node.EXE
Yarn: Not Found
npm:
version: 9.8.0
path: C:\Program Files\nodejs\npm.CMD
Watchman: Not Found
SDKs:
Android SDK: Not Found
Windows SDK: Not Found
IDEs:
Android Studio: AI-222.4459.24.2221.10121639
Visual Studio:
- 17.6.33723.286 (Visual Studio Community 2022)
Languages:
Java: 1.8.0_372
Ruby: Not Found
npmPackages:
"@react-native-community/cli": Not Found
react:
installed: 18.2.0
wanted: 18.2.0
react-native:
installed: 0.72.3
wanted: 0.72.3
react-native-windows: Not Found
npmGlobalPackages:
"react-native": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: Not found
newArchEnabled: Not found

Steps to reproduce

In the example below, the text is below the textInput's border on web and iOS, but above the border on Android, leaving almost no room for the textInput's background.

Snack, code example, screenshot, or link to a repository

https://snack.expo.dev/ANgohiA9k?platform=android

        <View style={{maxHeight:1000, minHeight:50, backgroundColor:'green'}}>
          <View style={{backgroundColor: 'yellow',
              flex:1,
              height:200,
              marginTop: 20,
              }}>
            <TextInput style={{borderTopWidth: 20, borderColor: 'red', backgroundColor:'blue', height:100, flex:1, padding:0 }}
              editable
              multiline
              value="bla bla bla 2"/>
          </View>
        </View>

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the Snack reproduction linked in the issue and run it on Android, iOS, and web. Compare the TextInput layout in the supplied nested View example, especially the 20px top border, flex:1 sizing, and multiline text placement. Done means the platforms account for the border consistently and the text and background render with equivalent spacing.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, ios, react-native
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.