bug(mat-table): Re-orderable sticky columns become un-sticky if you start dragging, abort the drag, and then scroll
- Dominant language
- TypeScript
- Stars
- 25k
- Forks
- 6.8k
- Avg merge
- 1d 8h
- Merged PRs (30d)
- 91
Description
### Is this a regression?
- [ ] Yes, this behavior used to work in the previous version
### The previous version in which this bug was not present was
_No response_
### Description
If you create a Material Design Table with **reorderable columns** that are also **sticky**, the column headers become un-sticky if you start to reorder a column, abort, and then scroll.
StackBlitz that reproduces the issue: https://stackblitz.com/edit/angular-kyaurw?file=src/app/table-sticky-header-example.html
### Reproduction
Steps to reproduce:
1. https://stackblitz.com/edit/angular-kyaurw?file=src/app/table-sticky-header-example.html
2. Click and hold a column header and start to drag it, but release the mouse button before dropping it in a new location
3. Scroll down
4. The column header is no longer sticky (see screenshot of the issue)

### Expected Behavior
If you abort a drag/drop, the column header should still be sticky like all of the other headers.
### Actual Behavior
If you abort a drag/drop, the column header you clicked is no longer sticky.
### Environment
- Angular: 15.0.4
- CDK/Material: 15.0.4
- Browser(s): Chrome
- Operating System (e.g. Windows, macOS, Ubuntu): Windows
Contributor guide
Research direction
Start with the linked StackBlitz reproduction and its src/app/table-sticky-header-example.html entry point. Reproduce the aborted drag followed by scrolling in Chrome, then trace the table's sticky-column and reordering behavior. Done means the aborted drag no longer causes the selected header to become un-sticky.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- angular
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100