dylantarre/animation-principles1 file

Small 200 300ms

Use when building small transitions between 200-300ms - modal appearances, card expansions, navigation transitions that users consciously perceive

Specification
Skill ID
dylantarre/animation-principles/small-200-300ms
Publisher
dylantarre
Repository
animation-principles
Installs
0
Files
1
Synced
Sep 23, 2026
How to use it

Open any RiverX project, open the Skills panel in the chat, and search for this identifier. The files are fetched from the source repository at install time.

dylantarre/animation-principles/small-200-300msInstalls these files
  • SKILL.md

What this skill tells the agent

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.

Use this skill in a project

Open any RiverX project, search the Skills panel for dylantarre/animation-principles/small-200-300ms, and install it in one click.

Use this skill