react / react/react-native

TextInput callbacks inconsistent order of onSelectionChange and onChange/onChangeText

Open
#45,018 5 comments 1 reaction 0 assignees View on GitHub

Nobody has claimed this yet.

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

Description

Description

The order remains constant for almost every circumstance:
onChange -> onChangeText -> onSelectionChange
Here are some cases that i discovered in iOS (could be more)

  1. For the multiline textinput, for the first keypress onSelectionChange fires first, but for later key presses onChangeText/onChange fire first
  2. Selecting and deleting a word also deletes a space to the left of it, but in this case onSelectionChange fires first
Steps to reproduce

Snack
In textInput component, use multiline and console.log as callbacks for each of the functions in discussion, see the output

React Native Version

0.74.84

Affected Platforms

Runtime - iOS

Output of npx react-native info
System:
  OS: macOS 14.5
  CPU: (8) x64 Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
  Memory: 33.76 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 21.7.3
    path: ~/.nvm/versions/node/v21.7.3/bin/node
  Yarn: Not Found
  npm:
    version: 10.5.0
    path: ~/.nvm/versions/node/v21.7.3/bin/npm
  Watchman:
    version: 2024.05.06.00
    path: /usr/local/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.5
      - iOS 17.5
      - macOS 14.5
      - tvOS 17.5
      - visionOS 1.2
      - watchOS 10.5
  Android SDK: Not Found
IDEs:
  Android Studio: 2023.2 AI-232.10300.40.2321.11668458
  Xcode:
    version: 15.4/15F31d
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 20.0.1
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.74.2
    wanted: 0.74.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false
Stacktrace or Logs
selection triggered {"end":1,"start":1}
change triggered
change text triggered H
change triggered
change text triggered i
selection triggered {"end":1,"start":1}
Reproducer

https://snack.expo.dev/zhVuXAjkAi5BMHVKq__vG

Screenshots and Videos

No response

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 linked Snack and the React Native TextInput component on iOS, reproducing the logged order for multiline input, typing, and word deletion. Done means the callback ordering is consistent across the reported cases and the behavior is covered by an appropriate regression check.

Written by the indexing model from the issue text.

Assessment

Tech stack
ios, react-native
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.