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Measured entry

uilayouts-scroll-animation-default

scroll-effectspatialmotion on file

A client-side React wrapper that reveals any child as it enters the viewport, with configurable direction, delay, variants, viewport behavior, and semantic element. It ships as a shadcn registry item with a gallery demo, uses Motion for animation, and imports the usual aliased cn utility.

Specimen
Motion capture of the mounted demo, recorded by the harness. No audio track.
Harness screenshot of uilayouts-scroll-animation-default at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of uilayouts-scroll-animation-default at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of uilayouts-scroll-animation-default at 1440 pixels wide
Harness screenshot at 1440 pixels wide. No horizontal overflow recorded.

Measured

Every value below was written by the harness on the run that produced the frames above. None of it is derived from the prose.

Harness measurements recorded for uilayouts-scroll-animation-default
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal66.9 KB (132.3 KB build, 65.4 KB baseline)
Bare modeFAIL
Provider requiredNO
Demo usedwritten from the component source API

What the harness recorded

BARE BUILD

✗ Build failed in 30.83s
error during build:
[vite:load-fallback] Could not load <sandbox>/src/lib/utils (imported by src/components/ui/scroll-animation.tsx): ENOENT: no such file or directory, open '<sandbox>/src/lib/utils'

Verdict

A practical, flexible reveal primitive that built and mounted cleanly in the prepared harness. The bare check fails because the aliased cn utility is absent, so it needs a shadcn-style setup or a small import rewrite. Worth using when Motion is already part of the app.

Use it if

  • You want a reusable reveal wrapper for editorial sections, cards, or gallery items.
  • Your app already uses Motion and shadcn-style aliases and utilities.
  • You need per-instance control over direction, delay, viewport thresholds, or custom variants.

Skip it if

  • You only need a basic fade-in and do not want to add Motion for one effect.
  • Your accessibility policy requires an explicit reduced-motion path before animated content ships.
  • You need a strongly typed polymorphic primitive; this component accepts broad props and a fixed element list.

Install

Installation record for uilayouts-scroll-animation-default
Declared dependenciesmotion
Missing on installnone
Bare installfails once the shadcn-style helpers are removed, so it needs that setup
Providerno provider required in the harness

In a non-shadcn project, install Motion, replace the aliased cn import with your own class-name helper or remove it, and configure the path alias if you keep that import. Preserve the client-component boundary in frameworks that distinguish server and client components.

Source and credit

This page is a review, not a copy. The component source lives with its author and this site does not republish it. Read the license before you use anything.

Author repository

github.com/ui-layouts/uilayouts
License
MIT
Record published
2026-08-13

Alternatives

Other published entries for the scroll-effect pattern, ordered by what they measured: mounts first, then clean axe scans, then bare-mode passes, then the smaller bundle.