Defocus

A crisp emblem of glossy strokes drifts out of focus wherever the pointer passes, like a camera lens racking focus.

element
blur
focus
lens
emblem
shader
since 0.2

Background Studio: tune it below, then copy the code

Your system asks for reduced motion: the demo shows its final state and nothing moves.

Live demo

Defocus example

Code

It follows the controls above: change an option and the code changes with it.

<script src="https://search.axi0.io/axi0/motion/motion.js" defer></script>

<axi0-defocus cover></axi0-defocus>

import { Defocus } from "./motion/react/Defocus";

<Defocus />

<script setup lang="ts">
import Defocus from "./motion/vue/Defocus.vue";
</script>

<template>
  <Defocus />
</template>

const fx = document.createElement("axi0-defocus");
document.querySelector("#hero").append(fx);

The wrappers: Defocus.tsx (React, TypeScript) and Defocus.vue (Vue). Both render the same attributes as the HTML; the loader does the rest.

Options

Attribute	Default	What it does
`shape`	`orbits`	The emblem drawn
`size`	`1`	Emblem size
`blur`	`1`	How far out of focus the pointer takes it
`colors`	auto	Colors, comma separated (empty: the palette for the page's theme)
`background`	auto	Background color (empty: the theme's)
`speed`	`1`	How fast it moves
`theme`	`auto`	Light or dark palette (auto: from the page behind it)
`cover`	`false`	Fill the nearest positioned parent, behind its content

Decorative: the canvas is aria-hidden and takes no focus; with cover it ignores the pointer, so the content above it stays clickable and readable. With no pointer the blur wanders over the emblem on its own, so touch and keyboard users see the same scene. Drawn by the shared WebGL runner below device resolution (never more than one pixel per CSS pixel, device pixel ratio capped at 2); it starts when it comes within 300 px of the screen, the frame loop stops off screen and in hidden tabs, and reduced motion draws one still frame with no movement. Without WebGL it shows a still gradient in its own colors.

Size

defocus.js is 0.9 KB gzip, with gl.js 2.1 KB and backgrounds-kit.js 3.4 KB it needs. A page loads the loader (2.9 KB) and core.js (1.4 KB) once, whatever it uses.