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080104 motion animation

Skill natuleadan/skills/skills/080104-motion-animation

Motion design and animation: timing, easing, spring physics, micro-interactions, reduced motion, and performance for frontend interfaces.From its SKILL.md

Install
npx -y skills add natuleadan/skills --skill 080104-motion-animation

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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  • 2 stars2 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

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The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

1.8 KB, 365 tokens by cl100k_base, as published. Nobody here has run it

Motion & Animation Principles

Animation and motion design for frontend interfaces — timing, easing, physics, micro-interactions, and performance. Covers both brand (expressive) and product (task-serving) motion.

References

TopicFile
Timing values, easing curves, CSS/JS implementations, platform standardsreferences/timing-easing.md
Spring physics, spatial continuity, shared transitions, reduced motion, interruption handlingreferences/motion-principles.md
Press feedback, ripple, skeleton, toast, toggle, dropdown, focus, tabs, progressreferences/micro-interactions.md

Core Rules

  • Timing: Micro-interactions 150-300ms. Complex transitions ≤400ms. Exit 60-70% of enter. Stagger 30-50ms per item.
  • Easing: Ease-out for entering (exponential: quart/quint/expo), ease-in for exiting. No bounce, no elastic, no linear for UI.
  • Performance: Animate transform/opacity only. Never width/height/top/left. Interruptible animations. 60fps (~16ms/frame).
  • Reduced motion: Respect prefers-reduced-motion. Data readable immediately. No orchestrated page-load sequences.
  • Product vs Brand: Product = 150-250ms, conveys state only. Brand = more expressive, spring physics, stagger, shared elements.

When to Use

  • Adding micro-interactions to buttons/toggles
  • Designing page transitions
  • Implementing loading animations
  • Creating gesture feedback
  • Reviewing motion performance
  • Ensuring reduced-motion support

What ships with it: 5 files

30.2 KB alongside SKILL.md, 1 of them executable

references/

scripts/

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