0.69+ SectionList jumps
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Description
Description
Something happening with SectionList at react-native: 0.69+
See videos for better understanding. It is something with huge lists (big amount of items)
It starts to jump and blink
Also, I've noticed that when I'm doing downgrade of react-native to 0.68 - it starts to work totally fine
React Native Version
0.69.6
Output of npx react-native info
OS: macOS 12.5
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Memory: 240.36 MB / 16.00 GB
Shell: 5.8.1 - /bin/zsh
Binaries:
Node: 16.16.0 - /usr/local/bin/node
Yarn: 1.22.19 - /usr/local/bin/yarn
npm: 9.5.0 - /usr/local/bin/npm
Watchman: Not Found
Managers:
CocoaPods: 1.12.0 - /Users/denys/.rvm/rubies/ruby-2.7.6/bin/pod
SDKs:
iOS SDK:
Platforms: DriverKit 22.1, iOS 16.1, macOS 13.0, tvOS 16.1, watchOS 9.1
Android SDK: Not Found
IDEs:
Android Studio: 2021.2 AI-212.5712.43.2112.8815526
Xcode: 14.1/14B47b - /usr/bin/xcodebuild
Languages:
Java: Not Found
npmPackages:
@react-native-community/cli: Not Found
react: 18.0.0 => 18.0.0
react-native: 0.69.6 => 0.69.6
react-native-macos: Not Found
npmGlobalPackages:
*react-native*: Not Found
Steps to reproduce
- Install fresh expo project or clone from git
- Scroll up and down to trigger pagination
- Scroll for about 1-2-4 minutes (can't upload full 3 minutes video)
Snack, code example, screenshot, or link to a repository
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 reproducing the jumping and blinking in the linked reactNativeSectionListJumps repository using React Native 0.69.6, a large SectionList, and pagination while scrolling. Compare the behavior with React Native 0.68 and use the provided video and reproduction steps as the baseline. Done means scrolling large SectionLists no longer jumps or blinks under the reported pagination scenario.
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
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100