SVG Scroll-Timeline Animation
CSS scroll-driven animations tie SVG animation progress directly to scroll position — no JavaScript scroll listeners required.
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scroll-timeline vs view-timeline
`scroll-timeline` ties animation progress to the scroll position of a scrolling container overall; `view-timeline` ties it to a specific element's visibility progress as it moves through the viewport — SVG icons animating as they scroll into view typically want `view-timeline`, while a page-wide progress indicator wants `scroll-timeline`.
- scroll-timeline tracks overall container scroll position
- view-timeline tracks a specific element's viewport visibility progress
- Choose based on whether the animation is element-specific or page-wide
Practical SVG Scroll Animation Patterns
An SVG icon that draws itself in (stroke-dashoffset animating from full to zero) as it scrolls into view, an illustration that fades and scales in, or a progress-indicator SVG that fills based on overall page scroll — all achieved with pure CSS `animation-timeline` properties, no scroll event listeners.
- Stroke-draw-in effects trigger naturally as icons scroll into view
- Fade and scale entrance animations tie cleanly to view-timeline
- Page scroll progress indicators use scroll-timeline with zero JS
Frequently Asked Questions
Does this replace JavaScript scroll-triggered animation libraries?
For supporting browsers, yes, for many common cases — but check current browser support before removing a JS fallback entirely, since scroll-driven animations are a relatively recent CSS addition.
Can I animate stroke-dashoffset with scroll-timeline?
Yes — standard CSS animation properties including stroke-dashoffset work with animation-timeline exactly as they would with a traditional time-based @keyframes animation, just driven by scroll instead of a clock.
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