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useRect: scrollTop/scrollLeft accumulate past the wrapper boundary to document root #17

Description

@arzafran

Summary

useRect's internal scrollTop / scrollLeft helpers (packages/hamo/src/use-rect/utils.ts) walk up the ancestor chain accumulating scroll offset past the intended wrapper boundary, all the way to the document root. This is flagged in #12 as a deliberate "known follow-up (not in this PR)":

useRect's scrollTop/scrollLeft helpers accumulate scroll past the intended wrapper boundary up to the document root. Left as-is pending a coordinate-space decision — it's tested behavior and changing it blindly is riskier than the cleanup is worth.

Filing as a tracking issue so the decision isn't lost once the v1 PR (#12) merges and its description is buried.

Why it's deferred, not fixed

The current behavior is covered by tests, and the "correct" coordinate space depends on intended usage (wrapper-relative vs document-relative). Changing it blindly risks regressing consumers who rely on the current accumulation.

Decision needed

  • Define the intended coordinate space for useRect offsets (stop at the configured wrapper vs. continue to root).
  • If wrapper-relative is correct, bound the traversal at the wrapper and update the tests to lock the intended semantics.

Notes

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