foundation
CSS Animations + Keyframes
Author keyframes, iteration modes, and timing with live preview.
Learning checklist
- Timing functions & delays
- Fill modes and directions
- Animating transforms & opacity
Definition
Author keyframes, iteration modes, and timing with live preview.
Syntax
Example
Deep dive
Why this matters
Principles, mental models, and debugging clues tailored to the topic.
Visual intuition
Each property is paired with motion or color feedback so you build muscle memory, not just recall syntax.
Copy-ready CSS
Controls emit exact CSS you can copy. Use it as a starter token or paste into DevTools for instant validation.
Performance notes
Learn where reflow, repaint, or compositing occurs so you avoid jank and choose GPU-friendly paths.
Accessibility first
Focus-visible, reduced-motion, and contrast tips are woven into every lab to keep experiences inclusive.
Practice
Try recreating a UI card using this topic. Toggle between dark and light modes to validate token contrast and responsiveness.
Tip: use DevTools overlays (grid/flex) plus the copy CSS button.
Animation Studio
Control duration, easing, delay, and iteration. Watch the orb animate smoothly while the CSS updates live.
Related topics
Keep exploring adjacent concepts.