bug(cdk-virtual-scroll-viewport): Scrollbar scrolls down a distance
- Dominant language
- TypeScript
- Stars
- 25k
- Forks
- 6.8k
- Avg merge
- 1d 8h
- Merged PRs (30d)
- 91
Description
#### Reproduction
https://stackblitz.com/edit/angular-jwh2bj?file=src%2Fapp%2Fcdk-virtual-scroll-overview-example.html
Steps to reproduce:
1. Click **Menu** button.
2. Click **Remove with problem** button.
#### Expected Behavior
The scrollbar is still keeping the current position.
#### Actual Behavior
It scrolls down some distances.
#### Environment
- Angular: 9.0.0
- CDK/Material: 9.0.0
- Browser(s): Chrome 84.0.4147.89 64 bit
- Operating System (e.g. Windows, macOS, Ubuntu): Windows 10
Contributor guide
Research direction
Start with the linked StackBlitz reproduction and follow the Menu and Remove with problem steps in the cdk-virtual-scroll-viewport example. Confirm the scrollbar moves from its current position after removal, then trace the relevant virtual-scroll behavior and add or update coverage so the position remains unchanged.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- angular, typescript
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100