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Measured entry

cultui-edge-blur

background-effectglassmorphismmotion on file

A client-side React overlay that stacks masked backdrop-filter layers to soften the top or bottom edge of the viewport. It ships as a shadcn registry component with top and bottom convenience exports, uses Tailwind utility classes for positioning, and has no third-party runtime package dependencies.

Specimen
Motion capture of the mounted demo, recorded by the harness. No audio track.
Harness screenshot of cultui-edge-blur at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of cultui-edge-blur at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of cultui-edge-blur 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 cultui-edge-blur
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal20.8 KB (86.3 KB build, 65.5 KB baseline)
Bare modeOK
Provider requiredNO
Demo usedwritten from the component source API

Verdict

A focused, dependency-free effect that builds and mounts cleanly even outside a shadcn setup. Use it for persistent viewport-edge softening, but verify browser support and stacking behavior against headers, dialogs, and other fixed layers.

Use it if

  • You want content to fade softly beneath a fixed viewport edge while scrolling.
  • You need a pointer-transparent overlay that can sit at either the top or bottom.
  • Your browser support policy allows backdrop filters and CSS masks.

Skip it if

  • You need the effect confined to a scrolling container instead of the viewport.
  • You must support browsers where backdrop filters or CSS masks are unavailable.
  • You want a simple opaque gradient and do not need layered live-content blur.

Install

Installation record for cultui-edge-blur
Declared dependenciesnone declared
Missing on installnone
Bare installbuilds and mounts without the shadcn-style helpers
Providerno provider required in the harness

Copy the client component into the project and ensure React client components are supported. Add Tailwind CSS for its positioning utilities, or replace those class names with equivalent CSS. No provider or extra package is 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/nolly-studio/cult-ui
License
MIT
Record published
2026-08-16

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.