Iridescence `<mv-iridescence>`

Como funciona

Película de sabão WebGL mantida na vertical: a gravidade a deixa fina no alto e grossa embaixo, de modo que suas cores de interferência se empilham em faixas que redemoinhos lentos enrolam e marmorizam, e a película mais grossa se acomoda em uma pérola da cor de destaque. Duas luzes em faixa se refletem na película; o ponteiro as desliza e muda o ângulo de visão, o que desloca as cores ao seu redor. A película segue o tema: brilha com luz refletida em uma página escura e, retroiluminada, mostra seus tons pastel transmitidos em uma clara. Ela pausa fora da tela, compartilha o orçamento de contextos WebGL da página e mantém um quadro estático com movimento reduzido.

Categoria	Fundos
Tipo	Elemento WebGL (`<mv-iridescence>`)
Status	estável
Também instala	shader
Keywords	safe-rewrite, webgl, shader, iridescent, holographic, soap-film, pearl, hero

When to use

A beauty, fashion, crypto or creative brand wants a holographic, soap-film sheen as a hero backdrop
The backdrop should answer the pointer: reflections slide and colors shift where the visitor moves
The same iridescent hero must work in light (pastel, backlit) and dark (glowing) themes without extra tuning

Avoid when

The holographic look should apply to cards and buttons, not the page background → use Surface instead
A reflective liquid-metal surface is the intended look → use Liquid Chrome instead
A still section background is enough and no WebGL should run → use Backdrop instead

Instalação

node scripts/add.mjs iridescence --out ./src/marvelous

Agente de IA com o servidor MCP do Marvelous UI: install_components({ slugs: ["iridescence"], target_dir: "<absolute path>/src/marvelous", framework: "react" }).

Arquivos copiados (dependências incluídas): tokens/tokens.css, core/base.css, core/canvas.js, core/dom.js, core/element.js, core/i18n.js, core/motion.js, core/observe.js, core/webgl.js, components/shader/shader.js, components/shader/shader.css, components/iridescence/iridescence.js, components/iridescence/iridescence.css.

Uso

Marcação de referência, para usar como ponto de partida e personalizar com atributos, data-* e variáveis CSS:

<mv-iridescence data-fill></mv-iridescence>
<div style="position:relative;display:grid;place-items:center;height:100%;min-height:320px;padding:2rem 1rem;box-sizing:border-box;text-align:center;pointer-events:none">
  <div>
    <p style="margin:0;font:700 clamp(1.6rem,4vw,2.6rem)/1.1 var(--mv-font-sans);letter-spacing:-.03em;color:var(--mv-fg);text-shadow:0 0 28px var(--mv-bg),0 0 10px var(--mv-bg)">Thin as light</p>
    <p style="margin:.6rem auto 0;max-width:26rem;color:var(--mv-fg);text-shadow:0 0 16px var(--mv-bg),0 0 6px var(--mv-bg)">A soap film drains into bands of color. Move the pointer to tilt the light.</p>
  </div>
</div>

API

Attributes

Name	Tipo	Default	Description
`color`	CSS color	`var(--mv-accent)`	Pearl into which the thickest film settles; only its hue counts (tokens accepted, read again on theme change).
`scale`	number	`1`	Size of the swirls.
`amplitude`	number	`1`	Strength of the eddies that stir the bands (0 = flat horizontal bands).
`saturation`	number	`1`	Vividness of the interference colors (0 = a neutral sheen, max 3).
`depth`	number	`0.5`	Tonal depth: 0 = the whole film shows its colors, 1 = colors mostly where the strip lights fall.
`glint`	number	`1`	Strength of the strip-light reflections and their glare (0 = none, max 3).
`speed`	number	`1`	Time multiplier.
`paused`	boolean		Freezes the animation on the current frame.
`interactive`	boolean		Follows the pointer only over the element (otherwise across the whole window).
`dpr`	number	`1.5`	Max pixel density (capped at 2).
`data-fill`	boolean		Fills the positioned parent (absolute, inset 0).

Events

Name	Description
`mv-error`	The shader failed to compile on this GPU. detail: { message }. The element gets data-error and shows its fallback.

Content structure

Name	Description
`children`	Content placed inside the element sits above the film.

Accessibility

Decorative: the canvas is aria-hidden and never takes pointer events, and content placed inside stays in the normal reading order. The loop stops off screen and in hidden tabs; reduced motion (OS or <html data-motion="reduce">) and paused keep a still, representative frame. Without WebGL2 a still band of soap-film colors in the theme tokens is shown; forced colors and print hide the canvas. The bands are vivid and change brightness, so text placed over them needs a halo or a backing panel to stay readable.