small-200-300ms
Use when building small transitions between 200-300ms - modal appearances, card expansions, navigation transitions that users consciously perceive
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/dylantarre/animation-principles --skill small-200-300ms- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads small-200-300ms automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Small Transitions (200-300ms)
At 200-300ms, users consciously perceive motion. This duration bridges micro-interactions and full animations - ideal for UI state changes.
Disney Principles at Small Duration
Works Well
Squash & Stretch: Visible but restrained - 10-15% for playful interfaces, 5% for professional.
Anticipation: Brief wind-up works - 40-60ms preparation enhances 200ms main action.
Staging: Clear hierarchy - primary element leads, secondary follows by 50-100ms.
Straight Ahead/Pose to Pose: Pose to pose preferred - keyframes create polished motion.
Follow Through: Noticeable overshoot - 5-10% past target adds life.
Slow In/Slow Out: Full easing curves - both ease-in-out and custom beziers shine.
Arcs: Natural curves enhance - elements can travel on arcs rather than straight lines.
Secondary Action: One or two secondary actions - fade + scale, move + rotate.
Timing: 12-18 frames at 60fps. Smooth, deliberate motion.
Exaggeration: Moderate to pronounced - depends on brand personality.
Solid Drawing: Full transform combinations - translate, scale, rotate together.
Appeal: Conscious animation that builds brand character.
Doesn't Work
- Feeling instant (too slow)
- Complex character animation
- Long travel distances
- Multiple sequential stages
Easing Recommendations
/* Standard smooth transition */
transition: all 250ms ease-out;
/* Modal/card appearance - confident arrival */
transition: all 250ms cubic-bezier(0.16, 1, 0.3, 1);
/* Bouncy personality */
transition: transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
/* Professional, subtle */
transition: all 220ms cubic-bezier(0.4, 0, 0.2, 1);
Best Use Cases
- Modal dialogs appearing
- Card expand/collapse
- Navigation drawer slides
- Tab content transitions
- Filter panel toggles
- Image thumbnails expanding
- Alert/notification slides
Implementation Pattern
.modal {
opacity: 0;
transform: translateY(20px) scale(0.95);
transition: opacity 200ms ease-out,
transform 250ms cubic-bezier(0.16, 1, 0.3, 1);
}
.modal.open {
opacity: 1;
transform: translateY(0) scale(1);
}
.card-expand {
transition: all 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
Key Insight
Small transitions are seen and understood. Users track the motion and their brain processes the spatial relationship. Use this to guide attention and communicate hierarchy.
FAQ
What does the small-200-300ms skill do?
Use when building small transitions between 200-300ms - modal appearances, card expansions, navigation transitions that users consciously perceive
How do I install small-200-300ms?
Run npx skills add https://github.com/dylantarre/animation-principles --skill small-200-300ms in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/small-200-300ms/ (personal) or .claude/skills/small-200-300ms/ (project).
Which AI agents can use small-200-300ms?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is small-200-300ms safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains small-200-300ms?
It is published by dylantarre in dylantarre/animation-principles. It has 486 recorded installs.
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