fix(recycling): place item separator correctly in inverted lists - #1
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fix(recycling): place item separator correctly in inverted lists#1HoshangDEV wants to merge 1 commit into
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In an inverted list both the scroller and each cell carry a flip transform, so a cell's trailing separator visually lands between items i and i-1. Every separator shifts one slot toward the start of the list, the two items at the far end sit flush against each other, and a stray separator dangles off the start edge. Render the separator ahead of the item when inverted so it still falls between items i and i+1. Related to Shopify#638
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Superseded by Shopify#2441. |
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Description
In an inverted list,
ItemSeparatorComponentlands on the wrong side of the item: every separator shifts one slot toward the start, the last two items sit flush, and a stray separator dangles off the start edge.invertedapplies a flip transform to both the scroller and each cell, so the two cancel inside the cell but the cells themselves are mirrored — a cell's trailing edge points at index − 1, not index + 1. Fix is placement only: render the separator ahead of the item when inverted.leadingItem/trailingItemsemantics, last-row suppression, and measured cell size are all unchanged.Related to Shopify#638, which reported this against 1.3.0 and still reproduces on 2.3.2.
Reviewers' hat-rack 🎩
numColumns > 1) should follow the same argument but have no dedicated coverage here.Test plan
yarn test(189 passed),yarn type-check,yarn lintInvertedSeparator.test.tsx— confirmed failing on unmodifiedmain