micro-interaction-motion-design
Skill4 starsChanged 2 months agoMITView on GitHub
Define motion tokens, interaction patterns, and feedback animations. Use when animation, transitions, micro-interaction, hover effects, loading states, motion, or make the UI feel alive.
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The file
We split this skill into the rules it gives an agent
1 rule. About 0 are common, 0 are distinctive, and 1 is very specific to this project.
≈0
Common · estimate
Many files like this have a rule of this kind.
≈0
Distinctive · estimate
This author's own choices. Worth a look.
1
Very specific
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- Common
- Distinctive
- Very specific
- Very specific: line 34
Always wrap non-essential animations in @media (prefers-reduced-motion: reduce).
≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
Motion is communication, not decoration. Every animation answers a question the user didn't ask out loud: "Did that work?", "Where did it go?", "What changed?" Motion without purpose is noise; motion with purpose is clarity.
1. Define motion tokens
Like design tokens but for time and movement. See MOTION-TOKENS.md for the canonical schema. Core tokens:
(a) Durations: motion-instant: 0ms, motion-fast: 100ms, motion-normal: 200ms, motion-slow: 300ms, motion-deliberate: 500ms.
(b) Easing curves: ease-default: cubic-bezier(0.4, 0, 0.2, 1), ease-in: cubic-bezier(0.4, 0, 1, 1), ease-out: cubic-bezier(0, 0, 0.2, 1), ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275).
2. Catalog interaction patterns
For each interactive element type, define the motion:
(a) Hover: subtle bg shift or elevation change, motion-fast + ease-default.
(b) Press/active: scale down slightly (0.97–0.98) or darken, motion-instant.
(c) Focus: ring appears, motion-fast + ease-out.
(d) Drag: element follows cursor with slight lag, ease-out.
(e) Toggle/switch: slides with motion-normal + ease-spring.
3. Define feedback state animations
(a) Loading: spinner or skeleton pulse. Pulse = opacity oscillation 0.5–1.0, motion-deliberate, infinite. Skeleton shimmer = gradient slide, 1.5s, infinite.
(b) Success: checkmark appears with scale-in, motion-normal + ease-spring. Brief green flash on container.
(c) Error: shake animation (horizontal 3-frame oscillation, motion-normal). Error message slides in from top.
(d) Empty state: gentle fade-in of illustration + text, motion-slow + ease-out.
4. Transition animations
(a) Page/route transitions: crossfade or slide, motion-normal.
(b) Modal open: fade backdrop + scale-up content from 0.95, motion-normal + ease-out. Modal close: reverse, motion-fast.
(c) Dropdown/popover: scale-Y from 0 to 1, origin at top, motion-fast + ease-out.
(d) Toast/notification: slide-in from edge, motion-normal + ease-out. Auto-dismiss after 5s with fade-out.
5. Respect user preferences
Always wrap non-essential animations in @media (prefers-reduced-motion: reduce). Under reduced motion: keep functional transitions (loading indicators), remove decorative ones (bounces, slides), replace motion with instant opacity changes.
Output
Motion spec: token definitions + interaction pattern catalog + feedback state specs + transition specs + reduced-motion behavior.
Anti-patterns
- Animations longer than 500ms for UI feedback (feels sluggish).
- Bounce easing on everything (feels toy-like).
- Animating layout properties (width, height, top, left) instead of transform/opacity (causes jank).
- Motion that blocks interaction (user has to wait for animation to finish before clicking).
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