fix: prefer ancestor drop target over nearest-by-distance in DragManager#10170
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mvanhorn wants to merge 2 commits into
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fix: prefer ancestor drop target over nearest-by-distance in DragManager#10170mvanhorn wants to merge 2 commits into
mvanhorn wants to merge 2 commits into
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snowystinger
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Looks good, reviewers will want to pull it down and copy the codesandbox into our storybook to verify as well.
I'll hopefully have some time to try it tomorrow.
snowystinger
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Verified locally, thank you!
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Summary
Drag and drop now prefers an ancestor drop target over a closer-by-distance sibling, matching how nested drop zones are expected to resolve.
Why this matters
Reported in #10055:
findNearestDropTargetpicked the geometrically nearest target, so a small drop zone next to a containing one could win even when the pointer was inside the container. The fix prefers an ancestor target when the pointer is within it, before falling back to nearest-by-distance.Changes
DragManager's target selection to prefer an ancestor drop target containing the pointer.Testing
Added a DnD test covering the nested-target case.
Fixes #10055
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