vibecodng.com

Free MCP betaIndex and tools live

Measured entry

motion-primitives-glow-effect

background-effectgradient-glowmotion on file

A client-side React overlay that animates configurable gradients behind another element, with rotate, pulse, breathing, color-shift, flow, and static modes. It ships as a shadcn registry TypeScript file and depends on Motion for React, Tailwind utility classes, and the conventional cn helper imported through the project alias.

Specimen
Motion capture of the mounted demo, recorded by the harness. No audio track.
Harness screenshot of motion-primitives-glow-effect at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of motion-primitives-glow-effect at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of motion-primitives-glow-effect 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-glow-effect
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal67.1 KB (132.5 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 26.89s
error during build:
[vite:load-fallback] Could not load <sandbox>/src/lib/utils (imported by src/cut/glow-effect.tsx): ENOENT: no such file or directory, open '<sandbox>/src/lib/utils'

Verdict

A flexible, verified gradient overlay for teams already using the expected stack. It mounts cleanly in the prepared harness, but the bare failure confirms it needs a shadcn-style setup rather than copy-and-run use in an arbitrary React project.

Use it if

  • You need a reusable animated halo behind cards, buttons, focus areas, or dark hero content.
  • Your React app already uses Tailwind, a cn class-merging helper, and Motion.
  • You want control over colors, blur, scale, timing, and animation mode through props.

Skip it if

  • Your product avoids perpetual decorative motion or requires reduced-motion behavior without adapting the component.
  • You need a self-contained effect that works without Tailwind utilities and a project alias.
  • You cannot justify adding Motion for a decorative background effect.

Install

Installation record for motion-primitives-glow-effect
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, provide a cn class-merging utility, configure the project alias used by the import or replace it with a local path, and ensure Tailwind recognizes the utility classes. Place the effect inside a relatively positioned container and add your own reduced-motion treatment if required.

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
2026-08-14

Alternatives

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