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CSS vs JavaScript SVG Animation — Complete Guide

CSS handles simple SVG animations. JavaScript (GSAP, Anime.js) unlocks complex sequences, path morphing, and scroll-triggered SVG animation. Here's when to use each.

CSS SVG Animation — Simple and Performant

CSS animations run on the GPU compositor thread — smooth, no JavaScript overhead, declarative.

  • Hover effects: fill/stroke color, opacity, scale transitions
  • Keyframe animations: spin, pulse, draw path (stroke-dashoffset)
  • SVG transform: rotate, translate, scale via CSS transform
  • No JavaScript: pure CSS animations have zero JS overhead
  • Limitation: no path morphing, no complex sequenced timelines

JavaScript SVG Animation — Full Control

GSAP (GreenSock) is the most powerful SVG animation library. Anime.js is lighter-weight. Both unlock capabilities CSS cannot achieve.

  • GSAP: industry standard, 60fps, timeline sequencing, plugins
  • GSAP MorphSVG: animate between two SVG path shapes (shape morphing)
  • GSAP DrawSVG: animate the length of a stroke for smooth line drawing
  • GSAP ScrollTrigger: pin and animate SVG as user scrolls
  • Anime.js: 7KB, great for simpler JavaScript SVG animations

Frequently Asked Questions

Should I use CSS or GSAP to animate my SVG logo?

CSS for simple hover color change or a one-time drawing animation. GSAP if you want a complex intro animation, sequenced reveals, or scroll-triggered effects for your logo.

Is GSAP free for commercial use?

GSAP core, ScrollTrigger, and most plugins are free for commercial use. Advanced plugins (MorphSVG, SplitText, Flip, DrawSVG) require a GSAP Club membership.

Does CSS animation perform better than JavaScript animation?

CSS transitions and transforms run on the GPU compositor — very fast. GSAP uses requestAnimationFrame with transform optimizations — also GPU-accelerated. Both perform well; CSS has zero overhead.

Can I animate SVG files from imagetosvg.com?

Yes — the SVG output is standard SVG with path elements. Add class names in a text editor, then write CSS animations or GSAP timelines targeting those class names.

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