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Measured entry

motion-primitives-infinite-slider

scroll-effectspatialmotion on file

A client-side React marquee for continuously looping arbitrary children horizontally or vertically. It ships as shadcn registry source, duplicates the child set to form the loop, and depends on Motion, react-use-measure, Tailwind utility classes, and a local cn helper.

Specimen
Motion capture of the mounted demo, recorded by the harness. No audio track.
Harness screenshot of motion-primitives-infinite-slider at 375 pixels wide
Harness screenshot at 375 pixels wide. This viewport scrolled sideways.
Harness screenshot of motion-primitives-infinite-slider at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of motion-primitives-infinite-slider 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 motion-primitives-infinite-slider
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowflagged at 375
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal69.9 KB (135.3 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 27.48s
error during build:
[vite:load-fallback] Could not load <sandbox>/src/lib/utils (imported by src/cut/infinite-slider.tsx): ENOENT: no such file or directory, open '<sandbox>/src/lib/utils'

Verdict

A solid source-owned marquee with useful motion controls and a clean verified mount, but narrow layouts need containment work and the dependency cost is meaningful. It needs a shadcn-style setup because the bare project cannot resolve its local utility import.

Use it if

  • You need a continuously moving logo, sponsor, or compact content rail.
  • You want configurable direction, reversal, spacing, and hover speed in a source-owned component.
  • Your app already uses Motion and can absorb another measurement hook.

Skip it if

  • You need reliable narrow-screen containment without modifying the component or its wrapper.
  • You want a dependency-light marquee implemented with existing CSS animation utilities.
  • Duplicating interactive or screen-reader-relevant children would create confusing repeated content.
  • Your project cannot provide Tailwind utilities or the expected local cn helper.

Install

Installation record for motion-primitives-infinite-slider
Declared dependenciesmotion, react-use-measure
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 and react-use-measure, add a cn class-merging helper or replace that call, configure the at-sign source alias, and provide the Tailwind utility styles used by the component. Add overflow containment around the slider for narrow layouts.

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/ibelick/motion-primitives
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.