ui-animation

Design, implement, and debug UI animations with CSS transitions, WAAPI, and spring physics.

Updated Jul 6, 2026
One-click install
npx skills add https://github.com/shirulot/codex-skill --skill ui-animation-shirulot
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: ui-animation
Source: https://github.com/shirulot/codex-skill/tree/main/ui-animation
Command: npx skills add https://github.com/shirulot/codex-skill --skill ui-animation-shirulot

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill solves the inconsistency and performance issues common in UI motion design by providing a standardized framework for creating, reviewing, and debugging animations.

Core Features & Use Cases

  • Standardized Motion Design: Provides a library of proven easing curves, timing defaults, and spatial principles to ensure consistent polish across all product surfaces.
  • Performance Optimization: Offers deep-dive guidance on hardware-accelerated properties, avoiding layout-triggering properties, and managing compositor layers to prevent jank.
  • Workflow Integration: Includes a structured checklist for animation reviews, ensuring that every motion serves a purpose—feedback, orientation, continuity, or delight—without compromising accessibility or performance.

Quick Start

Use the ui-animation skill to review my current CSS transition implementation for the modal component and suggest improvements based on the performance guidelines.

Frequently Asked Questions about ui-animation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I optimize CSS transitions to prevent UI animation jank?

To prevent UI animation jank, optimize CSS transitions by using hardware-accelerated properties and avoiding layout-triggering properties. Manage compositor layers carefully to maintain smooth, high-quality motion across interactive components.

What's the best way to create interruptible motion for web modal and drawer components?

Create interruptible motion for web modals and drawers using the Web Animations API (WAAPI) combined with spring physics. This standardized framework ensures interactive gestures remain smooth and responsive across UI components.

How does WAAPI compare to CSS transitions for building UI motion design systems?

WAAPI provides advanced control for UI motion design systems compared to CSS transitions by natively supporting spring physics and interruptible animations. Both frameworks manage spatial principles and timing defaults to ensure consistent polish across product surfaces.

Does UI animation accessibility require special configuration for interactive web components?

UI animation accessibility requires adhering to specific motion design standards for interactive web components. Animations must serve feedback, orientation, continuity, or delight without compromising accessibility, ensuring inclusive, high-quality motion for all users.

Why does my spring physics animation cause layout shifts in interactive web components?

Spring physics animations cause layout shifts when animating properties that affect document flow. Debugging UI animations requires identifying these layout-triggering properties and switching to hardware-accelerated alternatives to prevent visual jank.