Repository navigation
Honor retained scrollbar thumb interaction states - #786
Merged
Merged
Conversation
This was referenced Sep 20, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Unchanged Code OSS authors
::-webkit-scrollbar-thumb:hover,:active, andmin-height, but WebScene retained only the base thumb style and a fixed 18 px minimum. This change admits native thumb interaction state into the existing pseudo cascade, so base/hover/active declarations preserve normal specificity, source order, layers, variables, and!important; the same authored minimum now drives scene geometry and hit testing.Pointer transitions recascade only the previous/new scroller, using two bits in the existing node flag byte and one runtime pointer. The change adds no pseudo DOM nodes, document scan, timer, frame demand, platform widget, or VS Code source change. Portable/native selector contracts, retained normal/hover/active/minimum/drag checks, and a 4,096-node / 100-cycle performance gate are authored.
Validation:
git diff --checkonly, following the active implementation-throughput direction. Builds, tests, pixels, benchmarks, package execution, and CI results are unclaimed.Closes #785.