CSS Scroll-driven Animations Generator
In the past, scroll-linked interactions demanded heavy JS libraries like GSAP or ScrollMagic. Modern CSS introduces native animation-timeline: scroll() and view() — delivering butter-smooth 60 FPS animations directly off the compositor thread without JavaScript.
/* 100% təmiz CSS ilə skroll animasiyası */
@keyframes revealCard {
from { opacity: 0; transform: translateY(40px) scale(0.9); }
to { opacity: 1; transform: translateY(0) scale(1); }
}
.card {
animation: revealCard linear both;
animation-timeline: view();
animation-range: entry 10% cover 40%;
}How to use it
- Select a timeline source: 'Full-page Reading Progress' (scroll) or 'Element In-View Reveals' (view).
- Scroll the interactive preview container (or click Auto-Scroll) to observe keyframes syncing directly with scroll coordinates.
- Switch animation effects (Fade & Slide Up, Zoom Scale, 3D Tilt, or Blur Unfurl).
- Fine-tune the
animation-rangebounds and copy production-grade CSS with graceful@supportsfallbacks.
How it works
What does animation-timeline: scroll() do?
Standard @keyframes are tethered to clock duration (animation-duration: 2s). animation-timeline: scroll() switches the driver to scroll offset: at 0% scroll position the animation is at 0%, and at 100% scroll depth it reaches 100% completion.
scroll() vs view() Timelines
scroll() links to the overall scroll progress of the container or root page (ideal for reading progress bars and sticky header transforms). view() tracks an element's position relative to its entrance and exit through the viewport (ideal for reveal-on-scroll cards).
/* Pure CSS reading progress bar without a single line of JS */
.progress-bar {
transform-origin: 0 50%;
animation: fillProgress linear;
animation-timeline: scroll();
}The power of animation-range
The animation-range property defines the exact entry and exit phases for the timeline: entry 0% cover 40% starts right as the element peeks into view and finishes when it occupies 40% of the viewport.
FAQ
Is any JavaScript scroll listener required?
No! It runs completely without JS onscroll or IntersectionObserver. The calculation happens directly on the browser's compositor thread without main-thread jank.
What is the browser support?
Supported natively in Chrome 115+, Edge 115+, Opera, and Chromium browsers (over 75% of global desktop and mobile traffic). Use @supports (animation-timeline: scroll()) for fallbacks.
How to honor accessibility preferences?
Always provide @media (prefers-reduced-motion: reduce) { animation: none !important; } for users sensitive to motion.
