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Measured entry

shadcn-spinner

loaderunclassifiedmotion on file

A small React loading indicator shipped as copy-in registry source. It wraps Lucide's loader icon, adds an accessible status label and Tailwind spin classes, and uses the shadcn cn helper with its class-merging dependencies.

Specimen
Motion capture of the mounted demo, recorded by the harness. No audio track.
Harness screenshot of shadcn-spinner at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-spinner at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-spinner 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 shadcn-spinner
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal29.9 KB (95.4 KB build, 65.5 KB baseline)
Bare modeFAIL
Provider requiredNO
Demo usedwritten from the component source API

What the harness recorded

BARE BUILD

✗ Build failed in 663ms
error during build:
[vite]: Rollup failed to resolve import "lucide-react" from "<sandbox>re-1809de24ea9d/src/cut/components/ui/spinner.tsx".

Verdict

A sensible, low-complexity spinner for React teams already aligned with shadcn conventions. It mounts cleanly without a provider and exposes the underlying SVG props, but it is only a visual busy-state primitive, not a complete progress or live-status pattern.

Use it if

  • You need a compact inline progress indicator beside status text or inside a control.
  • Your React interface already uses Lucide icons and Tailwind utility classes.
  • You want a copy-owned primitive whose class name and SVG props remain easy to customize.

Skip it if

  • You need determinate progress, elapsed-time feedback, or multi-step progress semantics.
  • Your design system avoids Lucide or Tailwind and adding their conventions is not worthwhile for one icon.
  • You need loading announcements that change dynamically, since the fixed accessible label only identifies a loading state.

Install

Installation record for shadcn-spinner
Declared dependenciesclass-variance-authority, clsx, tailwind-merge
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, add Lucide React, Tailwind animation utilities, and a cn helper backed by clsx and tailwind-merge. Either preserve the source import alias or replace it with your local utility path; retain the status role and accessible label.

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/shadcn-ui/ui
License
MIT
Record published
2026-08-16

Alternatives

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