Animation
Definition
Movement and transitions applied to web elements to guide attention, provide feedback, or enhance visual appeal.
What is Web Animation?
Web animation is any movement applied to page elements—from subtle button hover effects to complex page transitions. Done well, animation guides users, provides feedback, and makes interfaces feel polished. Done poorly, it annoys visitors and slows everything down.
Types of Web Animation
Micro Animations
Small, functional movements: buttons changing on hover, checkmarks appearing after form submission, loading indicators.
Transition Animations
How elements move between states: page transitions, menu openings, accordion expansions.
Scroll Animations
Elements that animate as they enter the viewport: fade-ins, slide-ups, reveals.
Loading Animations
Movement that entertains while content loads: spinners, progress bars, skeleton screens.
Why Animation Matters
| Purpose | Example |
|---|---|
| Feedback | Button depresses when clicked |
| Guidance | Arrow pointing to next step |
| Status | Spinner indicating loading |
| Delight | Playful transitions between pages |
| Context | Items sliding in from their origin |
Animation Best Practices
- Keep it fast - Animations over 300ms feel sluggish
- Have purpose - Every animation should serve a function
- Be consistent - Similar actions should animate similarly
- Respect preferences - Honour reduced motion settings
- Don't block - Users should never wait for animation to complete
Performance Considerations
Some animations are smoother than others. Animating opacity and transform properties is efficient. Animating width, height, or layout properties causes performance issues.
Test animations on slower devices—what's smooth on your MacBook might stutter on budget phones.