micro-interactions（微交互）

Micro-interaction Animation

Apply Disney's 12 animation principles to small UI feedback moments and interface details.

Quick Reference

Principle Applications

Squash & Stretch: Buttons compress slightly on press (scaleY: 0.95). Toggle thumbs squash when hitting bounds. Notification badges bounce on update. Keep subtle—this is UI, not cartoon.

Anticipation: Hover states prepare for click. Buttons lift/grow slightly before press animation. Draggable items elevate on grab start. Loading spinners wind up before spinning.

Staging: Active form field clearly distinguished. Error states demand attention. Success confirmations are unmistakable. One interaction feedback at a time.

Straight Ahead vs Pose to Pose: Progress indicators animate continuously (straight ahead). Checkboxes snap between states (pose to pose). Combine: loading indicator ends with state-change snap.

Follow Through & Overlapping: Ripple effects expand past tap point. Toggle switches overshoot then settle. Checkmarks draw with slight delay after box fills. Menu items stagger in.

Slow In / Slow Out: Quick ease-out for responsive feel. 100ms with ease-out feels instant. Avoid linear—looks broken. Snappy entrance, gentle settling.

Arc: Toggle switches travel in slight arc. Circular action buttons expand radially. Dropdown carets rotate smoothly. Menu items can follow curved path.

Secondary Action: Icon changes color as button state changes. Badge count updates with parent notification. Helper text appears as input focuses. Shadow responds to elevation.

Timing: Immediate feedback: 50-100ms. Standard transitions: 100-200ms. Complex micro-interactions: 200-300ms. Anything longer feels sluggish for small UI.

Exaggeration: Enough to notice, not enough to distract. Error shakes: 3-5px, not 20px. Success scales: 1.05-1.1, not 1.5. Subtle but unmistakable.

Solid Drawing: Transform origin matters—buttons scale from center, tooltips from pointer. Consistent behavior across similar elements. Maintain visual integrity during animation.

Appeal: Micro-interactions add personality without overwhelming. Users should feel the interface is responsive and alive. Small delights build into overall experience quality.

Component Patterns

Button States

.button {
    transition: transform 100ms ease-out,
                box-shadow 100ms ease-out;
}
.button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.button:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

Toggle Switch

.toggle-thumb {
    transition: transform 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toggle-thumb.active {
    transform: translateX(20px);
}

Checkbox

.checkmark {
    stroke-dasharray: 20;
    stroke-dashoffset: 20;
    transition: stroke-dashoffset 200ms ease-out 50ms;
}
.checkbox:checked + .checkmark {
    stroke-dashoffset: 0;
}

Timing Reference

Best Practices

1. Every interactive element needs feedback
2. Disabled states: no animation, reduced opacity
3. Group related feedback together
4. Don't animate on every change—filter unnecessary updates
5. Test without animation—functionality shouldn't depend on it
6. Respect prefers-reduced-motion