TanStack/virtual @tanstack/virtual-core@3.17.5

on GitHub

Patch Changes

• #1230 1e3b908 - Clamp the tracked scrollOffset at 0 when applying end-anchor measurement compensation and when re-anchoring in setOptions. Previously, with anchorTo: 'end' and content shorter than the viewport, items measuring smaller than their estimates drove the tracked offset negative with no scroll event to ever correct it — getDistanceFromEnd() reported a permanent phantom distance and iOS deferred measurement corrections stayed wedged forever.

• #1235 7dcfc07 - Stop iOS-deferred scroll adjustments from replaying stale deltas after the position is already correct (#1233). On iOS WebKit the end-anchored virtualizer defers scroll compensation while the scroller is live and replays it once settled, but two cases replayed a delta whose premise no longer held:

  • Absolute scroll commands (scrollToOffset / scrollToIndex / scrollToEnd) derive their target from current measurements, so a pending deferred delta is already stale — it now invalidates the deferral instead of letting it replay and shift the list off the just-established position. Relative commands (scrollBy) keep the deferral.
  • At the end clamp with anchorTo: 'end', a row above the viewport re-measuring smaller lets the browser clamp scrollTop onto the new bottom (already the correct position); the flush now drops the stale negative compensation instead of replaying it and lifting the view off the bottom. Positive deltas still replay, since content growth above does not clamp.