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)?