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Posted to notifications@superset.apache.org by "zuzana-vej (via GitHub)" <gi...@apache.org> on 2026/07/16 10:04:42 UTC
[I] Unable to add a top level tab [superset]
zuzana-vej opened a new issue, #42107:
URL: https://github.com/apache/superset/issues/42107
### Bug description
Go to dashboard > edit mode > layout element > tabs
Previously it was possible to add a top level tab.
<img width="524" height="177" alt="Image" src="https://github.com/user-attachments/assets/253d01b7-600a-4050-bc52-b2425f699d3b" />
Currently tabs are added but not at the top of the dashboard.
<img width="881" height="407" alt="Image" src="https://github.com/user-attachments/assets/2c216143-aa78-41f4-ad84-b8839d1104cf" />
### Screenshots/recordings
_No response_
### Superset version
6.1.0
### Python version
I don't know
### Node version
I don't know
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [ ] I have searched Superset docs and Slack and didn't find a solution to my problem.
- [ ] I have searched the GitHub issue tracker and didn't find a similar bug report.
- [ ] I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.
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Re: [I] Unable to add a top level tab [superset]
Posted by "dosubot[bot] (via GitHub)" <gi...@apache.org>.
dosubot[bot] commented on issue #42107:
URL: https://github.com/apache/superset/issues/42107#issuecomment-4990643744
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<!-- Answer -->
This looks like the issue addressed by [PR #39423](https://github.com/apache/superset/pull/39423). The root cause was that [PR #37891](https://github.com/apache/superset/pull/37891) moved the `DashboardHeader` outside the root `Droppable` component in `DashboardBuilder.tsx`, which caused the top-level drop target to collapse to **zero height** when no top-level tabs exist. This makes it impossible for react-dnd to detect hover events, so dragging "Tabs" from the layout panel can't place them at the dashboard root.
The fix in PR #39423 added a `min-height: 16px` to the `.empty-droptarget` in `StyledHeader` to keep the drop zone visible [[1]](https://github.com/apache/superset/pull/39423). This fix was backported to 6.1.0.
A few things to check:
- **Does it work on a blank dashboard?** If adding tabs works on a new empty dashboard but fails on dashboards with existing content, that confirms this exact issue.
- **Verify your build includes the fix** — depending on when your 6.1.0 build was created, it may predate the backport. You can check if PR #39423 is included in your deployment.
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Re: [I] Unable to add a top level tab [superset]
Posted by "zuzana-vej (via GitHub)" <gi...@apache.org>.
zuzana-vej closed issue #42107: Unable to add a top level tab
URL: https://github.com/apache/superset/issues/42107
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Re: [I] Unable to add a top level tab [superset]
Posted by "zuzana-vej (via GitHub)" <gi...@apache.org>.
zuzana-vej commented on issue #42107:
URL: https://github.com/apache/superset/issues/42107#issuecomment-4990779185
https://github.com/apache/superset/pull/39423 addressed here closing
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