claudeandClaude Sonnet 4.6 d895e14e48 feat(pdf): restore smooth crossfade for Chrome 111+ using document.startViewTransition ...

The original code used container.startViewTransition(setDocument) with a
synchronous callback, giving a 250ms CSS crossfade that looked smooth when
the PDF happened to re-render before the animation ended — but was a race.

Now there are three tiers:
- Chrome 126+: element-level startViewTransition, async, waits for pagerendered
- Chrome 111+ (Brave 138, Edge 111+): document-level startViewTransition with
  view-transition-name scoped to the PDF container, same async pattern
- Firefox / Safari / older Chromium: canvas snapshot overlay (no animation,
  but seamless — introduced in build #108)

The document-level path restores the smooth fade the user saw on Edge build
#93, now guaranteed to crossfade old→new rather than old→blank.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-06-07 12:22:46 +00:00

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feat(pdf): restore smooth crossfade for Chrome 111+ using document.startViewTransition

2026-06-07 12:22:46 +00:00