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[BUG] Input Callback from RangeSlider incorrect if you move right slider on top of left #3786
Description
Thank you so much for helping improve the quality of Dash!
We do our best to catch bugs during the release process, but we rely on your help to find the ones that slip through.
Describe your context
Please provide us your environment, so we can easily reproduce the issue.
- replace the result of
pip list | grep dashbelow
dash 4.1.0
-
if frontend related, tell us your Browser, Version and OS
- OS: MacOs Sonomoa
- Browser: Firefox
- Version: 150
Describe the bug
If you have a rangeslider, if you move the right slider on top of the left slider the right value in the tuple of the callback will remain unchanged.
If you move the left slide on top of the right slider, it behaves as expected.
Expected behavior
The value should be updated and represent the state of the UI. If both sliders are on 5 it should be [5, 5]
Screenshots
Wrong – Right slider moved on top of left, callback output is [5,15]
Correct – Left slider moved on top of right, callback output is [5,5]
Activity
camdecoster commentedon May 20, 2026
Thanks for reporting! We've reproduced this issue. I'll add it to our backlog and someone will take a look soon. If you'd like to fix it yourself, we can prioritize a PR review.
KoolADE85 commentedon Jun 12, 2026
I have tracked this one back to an upstream Radix issue, which has an open PR.
This issue can be resolved once that is released.
anjaweigel-tng commentedon Jul 21, 2026
Hello everyone, I just wanted to let you know that the upstream Radix issue is now fixed and there has been a new release containing this fix yesterday: https://www.radix-ui.com/primitives/docs/overview/releases :)
Would be great if dash could include the fix in the near future!
robertclaus commentedon Jul 27, 2026
@T4rk1n fixed this in dash as well. Thanks @anjaweigel-tng !