react / react/react-native

TextInput value flickers when adding new lines

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Component: TextInput Issue: Author Provided Repro Needs: Attention Platform: Android
Dominant language
C++
Stars
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Forks
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Avg merge
1d 23h
Merged PRs (30d)
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Description

Description

Text inside text input is flickering while going to next line as well as deleting text (video 1)

but problem solved if i give height prop instead of maxHeight to the textinput or specify number of lines (video 2)

code

<TextInput
multiline
onFocus={() => setIsFocused(true)}
underlineColorAndroid={'red'}
style={{
color: colors.text,
// height: 350,
fontSize: 18,
maxHeight: 350,
marginLeft: 5,
width: '100%',
}}
textAlignVertical="top"
spellCheck={false}
onChange={e => setText(e.nativeEvent.text)}>
{txt}

Steps to reproduce
React Native Version

0.73.5

Affected Platforms

Runtime - Android

Output of npx react-native info
info Fetching system and libraries information...
System:
  OS: Windows 11 10.0.22631
  CPU: "(8) x64 AMD Ryzen 3 5300U with Radeon Graphics         "
  Memory: 969.45 MB / 7.33 GB
Binaries:
  Node:
    version: 20.11.0
    path: C:\Program Files\nodejs\node.EXE
  Yarn: Not Found
  npm:
    version: 10.5.0
    path: C:\Program Files\nodejs\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK:
    API Levels:
      - "21"
      - "28"
      - "29"
      - "30"
      - "31"
      - "33"
      - "34"
    Build Tools:
      - 29.0.2
      - 30.0.3
      - 33.0.0
      - 33.0.1
      - 34.0.0
    System Images:
      - android-34 | Google APIs Intel x86_64 Atom
    Android NDK: Not Found
  Windows SDK:
    AllowDevelopmentWithoutDevLicense: Enabled
    Versions:
      - 10.0.19041.0
IDEs:
  Android Studio: AI-222.4459.24.2221.10121639
  Visual Studio: Not Found
Languages:
  Java: 17.0.8
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.5
    wanted: 0.73.5
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found
Stacktrace or Logs
-
Reproducer

snack.expo.dev/@akshaykhapare/carefree-blue-croissant?platform=android

Screenshots and Videos

video 1

https://github.com/facebook/react-native/assets/139696100/89d6f958-aefd-401e-b9dc-40a9f799abd8

video 2

https://github.com/facebook/react-native/assets/139696100/38443aae-2857-47db-b8ec-0047d9dd07fd

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

The issue names no source file or test. Start by running the linked Expo Snack on Android and reproduce the flicker while adding or deleting lines in a multiline TextInput using maxHeight; done means the flicker is gone without requiring a fixed height or explicit line count.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, react-native
Domain
mobile-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
42/100

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