Vanta.js — Animated WebGL Backgrounds Skill
When to use
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Decorative animated backgrounds behind hero sections
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You want “wow” quickly without building a full three.js scene
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Lightweight integration into static sites or React/Vue
How it works
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Vanta injects a canvas into a container element and renders an effect (many use three.js).
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Typical usage: include three.min.js (or provide THREE) + one Vanta effect bundle.
Key APIs/patterns
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Init:
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const effect = VANTA.WAVES({ el: "#hero", ...options })
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Update after init:
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effect.setOptions({ color: 0xff88cc })
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Resize:
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effect.resize() (if container size changes)
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Cleanup:
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effect.destroy() (important in SPAs)
Common pitfalls
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Container has no size → nothing visible
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Ensure the target element has explicit width/height (or is laid out).
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Multiple WebGL canvases on one page → GPU load
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Keep to 1–2 effects/page.
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Mobile/older GPU issues
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Provide a fallback background color/image; consider disabling on small screens.
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Bundling in frameworks
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Some builds require window.THREE or passing THREE in options.
Quick recipes
- 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>
- React cleanup pattern (concept)
- Create effect in useEffect , store in ref, call destroy() on unmount.
What to ask the user
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Which effect (waves, birds, fog, net, etc.) and brand colors?
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Must it run on mobile? If yes, what’s acceptable FPS/quality?
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Is it behind text (needs contrast/readability)?