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vantajs

Add animated backgrounds such as waves or fog with Vanta.js, which renders graphics through WebGL. Configure effects, integrate them into pages or React components, handle resizing and cleanup, and plan fallbacks for mobile devices.

OriginalShow the original description

Use when adding animated WebGL background effects with Vanta.js (setup, parameters, resizing, performance, integration in React/Next.js).

See how to install

Good for

  • Add animated waves behind a hero section
  • Adjust effect colors and movement
  • Integrate backgrounds into React or Next.js
  • Handle container resizing and effect cleanup
  • Provide fallback backgrounds for mobile devices

Files included (5)

  • SKILL.md2.0 KB
  • demo/index.html15.8 KB
  • demo/preview.jpg38.6 KB
  • demo/PROMPT.md1.8 KB
  • REFERENCES.md124 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

Vanta.js — Animated WebGL Backgrounds Skill

When to use

  • Decorative animated backgrounds behind hero sections
  • You want “wow” quickly without building a full three.js scene
  • Lightweight integration into static sites or React/Vue

How it works

  • Vanta injects a canvas into a container element and renders an effect (many use three.js).
  • Typical usage: include three.min.js (or provide THREE) + one Vanta effect bundle.

Key APIs/patterns

  • Init:
    • const effect = VANTA.WAVES({ el: "#hero", ...options })
  • Update after init:
    • effect.setOptions({ color: 0xff88cc })
  • Resize:
    • effect.resize() (if container size changes)
  • Cleanup:
    • effect.destroy() (important in SPAs)

Common pitfalls

  • Container has no size → nothing visible
    • Ensure the target element has explicit width/height (or is laid out).
  • Multiple WebGL canvases on one page → GPU load
    • Keep to 1–2 effects/page.
  • Mobile/older GPU issues
    • Provide a fallback background color/image; consider disabling on small screens.
  • Bundling in frameworks
    • Some builds require window.THREE or passing THREE in options.

Quick recipes

1) Minimal waves background

<div id="hero" style="height: 70vh;"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r134/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vanta/dist/vanta.waves.min.js"></script>
<script>
  const effect = VANTA.WAVES({ el: "#hero", color: 0x0b1220, shininess: 40, waveHeight: 16, zoom: 0.9 });
</script>

2) React cleanup pattern (concept)

  • Create effect in useEffect, store in ref, call destroy() on unmount.

What to ask the user

  • Which effect (waves, birds, fog, net, etc.) and brand colors?
  • Must it run on mobile? If yes, what’s acceptable FPS/quality?
  • Is it behind text (needs contrast/readability)?

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