react / react/react-native

SectionList's `onScrollToIndexFailed` does not catch requested sectionIndex & itemIndex

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Component: SectionList Issue: Author Provided Repro Needs: Attention Needs: Version Info
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描述

Description

onScrollToIndexFailed returns index,heighestMeasuredIndex, and averageItemHeight, which is enough in FlatList.
but in sectionList it should return requested sectionIndex and itemIndex, and heighestMeasured section & item index in addition to flat index, because we have only scrollToLocation method available for sectionList and section and item index params are needed.

Steps to reproduce

run the snack, press on scroll to no where, you will see the alert

React Native Version

0.76.3

Affected Platforms

Runtime - Android, Runtime - iOS, Runtime - Web, Runtime - Desktop, Build - MacOS, Build - Windows, Build - Linux

Output of npx react-native info
System:
  OS: Windows 11 10.0.22000
  CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
  Memory: 8.47 GB / 15.89 GB
Binaries:
  Node:
    version: 23.0.0
    path: C:\Program Files\nodejs\node.EXE
  Yarn:
    version: 1.22.0
    path: C:\Program Files (x86)\Yarn\bin\yarn.CMD
  npm:
    version: 10.9.0
    path: C:\Program Files\nodejs\npm.CMD
  Watchman:
    version: 20241027.093345.0
    path: E:\Software\Watchman\bin\watchman.EXE
SDKs:
  Android SDK: Not Found
  Windows SDK:
    AllowDevelopmentWithoutDevLicense: Enabled
    AllowAllTrustedApps: Disabled
IDEs:
  Android Studio: Not Found
  Visual Studio: Not Found
Languages:
  Java:
    version: 21.0.3
    path: /c/Program Files/Eclipse Adoptium/jdk-21.0.3.9-hotspot/bin/javac
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.2
    wanted: 0.76.2
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found
Stacktrace or Logs
scroll to index failed
Reproducer

https://snack.expo.dev/@arasrezaie/sectionlist-example

Screenshots and Videos

No response

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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

调研方向

从链接的 Expo Snack 开始,使用 onScrollToIndexFailed 重现 SectionList 滚动失败的问题。跟踪 SectionList 的回调契约及其 scrollToLocation 输入,然后验证失败结果除了包含扁平索引、高度和平均项目高度之外,还包含请求的分区和项目索引,以及已测量的最高分区和项目索引。

由索引模型根据 Issue 内容生成。

评估

技术栈
react-native
领域
mobile
Issue 类型
功能
难度
4/5
预计耗时
3-5 天
活跃度
停滞
描述清晰度
基本清楚
新手友好度
38/100

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