CSS animations create engaging experiences with keyframes and animation properties. Here's how to master them.
Basic Keyframes#
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Animation Properties#
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Timing Functions#
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Iteration and Direction#
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Fill Mode#
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Play State#
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Common Animations#
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Loading Spinners#
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Entrance Animations#
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Attention Seekers#
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Performance#
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Reduced Motion#
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Best Practices#
Performance:
✓ Animate transform and opacity
✓ Use will-change sparingly
✓ Keep animations short (< 500ms for UI)
✓ Test on low-end devices
Accessibility:
✓ Respect prefers-reduced-motion
✓ Avoid flashing content
✓ Don't animate essential content
✓ Provide static alternatives
UX:
✓ Use animation purposefully
✓ Keep animations subtle
✓ Match animation to content
✓ Consider mobile users
Avoid:
✗ Animating layout properties
✗ Too many simultaneous animations
✗ Infinite animations without purpose
✗ Blocking user interaction
Conclusion#
CSS animations bring interfaces to life with keyframes and animation properties. Use GPU-accelerated properties (transform, opacity) for smooth performance. Respect user preferences with prefers-reduced-motion. Keep animations purposeful and subtle - they should enhance, not distract from, the user experience. Master timing functions for natural-feeling motion and use fill-mode to control animation state.