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feat(web): dt-scale-in invisible-via-opacity during delay so children can self-measure

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Prior keyframes held descendants at transform: scale(0) during the
animation-delay phase (with fill-mode: both). Any DTStaggerContainer
child performing getBoundingClientRect()-based self-measurement on
mount — most notably R3F's <Canvas>, but also chart libs, video
players, and virtualized lists — read a near-zero rect at the
transform-multiplied size and never recovered, because transform
changes don't fire ResizeObserver when they end.

New keyframes:
  0%     opacity 0, transform none    (during delay: invisible but
                                       full layout size, no transform —
                                       children measure correctly)
  0.001% opacity 0, transform scale(0) (snap to scaled-down at start)
  100%   opacity 1, transform scale(1) (animate scale + fade in)

Behavior change for consumers: entrance gains a subtle fade-in
alongside the scale-in. Functionally equivalent for the existing
DTStaggerContainer use cases. Fixes the SuggestedPlacements 3D
viewer "blank teal block until scroll" bug on the Hydrogen
storefront product pages.

Bumps @dangerousthings/web to 0.5.0 (MINOR — visual behavior change).

To revert: git revert <this-commit>

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
michael
2026-05-06 21:38:42 -07:00
parent 1aeceb8f24
commit a459b643e8
3 changed files with 17 additions and 3 deletions
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6
packages/web/CHANGELOG.md
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@@ -1,5 +1,11 @@
# @dangerousthings/web
## 0.5.0
### Minor Changes
- `dt-scale-in` keyframes now hold `transform: none, opacity: 0` during `animation-delay` (the period when `animation-fill-mode: both` shows the first keyframe), then snap to `scale(0)` at animation start before scaling/fading to 1. Visual difference vs prior is a subtle fade-in alongside the scale-in. **Why:** prior keyframes held descendants at `transform: scale(0)` during the delay, which caused any child performing `getBoundingClientRect()`-based self-measurement on mount (R3F `<Canvas>`, ResizeObserver-driven charts, virtualized lists, etc.) to read a near-zero rect and never recover — `transform` changes don't fire `ResizeObserver` when they end. Fixes the SuggestedPlacements 3D viewer "blank teal block until scroll" bug on the Hydrogen storefront product pages.
## 0.4.1
### Patch Changes