# Animation · HeroUI

> Add smooth animations and transitions to HeroUI v3 components

- Page: https://jiguang132.com/systems/heroui/docs/getting-started/animation
- Based on: HeroUI documentation (Apache-2.0) @ 60edd8ed751b1d2a270623fbb182bbcfa8baa9af

HeroUI components support multiple animation approaches: built-in CSS transitions, custom CSS animations, and JavaScript libraries like Framer Motion.

## Built-in Animations

HeroUI components use data attributes to expose their state for animation:

```css
/* Popover entrance/exit */
.popover[data-entering] {
  @apply animate-in zoom-in-90 fade-in-0 duration-200;
}

.popover[data-exiting] {
  @apply animate-out zoom-out-95 fade-out duration-150;
}

/* Button press effect */
.button:active,
.button[data-pressed="true"] {
  transform: scale(0.97);
}

/* Accordion expansion */
.accordion__panel[aria-hidden="false"] {
  @apply h-[var(--panel-height)] opacity-100;
}
```

**State attributes for styling:**
- `[data-hovered="true"]` - Hover state
- `[data-pressed="true"]` - Active/pressed state
- `[data-focus-visible="true"]` - Keyboard focus
- `[data-disabled="true"]` - Disabled state
- `[data-entering]` / `[data-exiting]` - Transition states
- `[aria-expanded="true"]` - Expanded state

## CSS Animations

**Using Tailwind utilities:**

```tsx
// Pulse on hover
<Button className="hover:animate-pulse">
  Hover me
</Button>

// Fade in entrance
<Alert className="animate-fade-in">
  Welcome message
</Alert>

// Staggered list
<div className="space-y-2">
  <Card className="animate-fade-in animate-delay-100">Item 1</Card>
  <Card className="animate-fade-in animate-delay-200">Item 2</Card>
</div>
```

**Custom transitions:**

```css
/* Slower accordion */
.accordion__panel {
  @apply transition-all duration-500;
}

/* Bouncy button */
.button:active {
  animation: bounce 0.3s;
}

@keyframes bounce {
  50% { transform: scale(0.95); }
}
```

## Framer Motion

HeroUI components work seamlessly with Framer Motion for advanced animations.

**Basic usage:**

```tsx
import { motion } from 'framer-motion';
import { Button } from '@heroui/react';

const MotionButton = motion(Button);

<MotionButton
  whileHover={{ scale: 1.05 }}
  whileTap={{ scale: 0.95 }}
>
  Animated Button
</MotionButton>
```

**Entrance animations:**

```tsx
<motion.div
  initial={{ opacity: 0, y: 20 }}
  animate={{ opacity: 1, y: 0 }}
  transition={{ duration: 0.5 }}
>
  <Alert>
    <Alert.Title>Welcome!</Alert.Title>
  </Alert>
</motion.div>
```

**Layout animations:**

```tsx
import { AnimatePresence, motion } from 'framer-motion';

function Tabs({ items, selected }) {
  return (
    <div className="flex gap-2">
      {items.map((item, i) => (
        <Button key={i} onPress={() => setSelected(i)}>
          {item}
          {selected === i && (
            <motion.div
              layoutId="active"
              className="absolute inset-0 bg-accent"
              transition={{ type: "spring", bounce: 0.2 }}
            />
          )}
        </Button>
      ))}
    </div>
  );
}
```

## Render Props

Apply dynamic animations based on component state:

```tsx
<Button>
  {({ isPressed, isHovered }) => (
    <motion.span
      animate={{
        scale: isPressed ? 0.95 : isHovered ? 1.05 : 1
      }}
    >
      Interactive Button
    </motion.span>
  )}
</Button>
```

## Accessibility

**Respecting motion preferences:** HeroUI automatically respects user motion preferences using Tailwind's `motion-reduce:` utility. All built-in transitions and animations are disabled when users enable "reduce motion" in their system settings.

HeroUI extends Tailwind's `motion-reduce:` variant to support both the native `prefers-reduced-motion` media query and the `data-reduce-motion` attribute.

```css
/* HeroUI pattern - uses Tailwind's motion-reduce: */
.button {
  @apply transition-colors motion-reduce:transition-none;
}

/* Expands to support both approaches: */
@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}

[data-reduce-motion="true"] .button {
  transition: none;
}
```

With Framer Motion:

```tsx
import { useReducedMotion } from 'framer-motion';

function AnimatedCard() {
  const shouldReduceMotion = useReducedMotion();

  return (
    <motion.div
      initial={{ opacity: 0 }}
      animate={{ opacity: 1 }}
      transition={{ duration: shouldReduceMotion ? 0 : 0.5 }}
    >
      <Card>Content</Card>
    </motion.div>
  );
}
```

**Disabling animations globally:** Add `data-reduce-motion="true"` to the `<html>` or `<body>` tag:

```html
<html data-reduce-motion="true">
  <!-- All HeroUI animations will be disabled -->
</html>
```

HeroUI automatically detects the user's `prefers-reduced-motion: reduce` setting and disables animations accordingly.

## Performance Tips

**Use GPU-accelerated properties:** Prefer `transform` and `opacity` for smooth animations:

```css
/* Good - GPU accelerated */
.slide-in {
  transform: translateX(-100%);
  transition: transform 0.3s;
}

/* Avoid - Triggers layout */
.slide-in {
  left: -100%;
  transition: left 0.3s;
}
```

**Will-change optimization:** Use `will-change` to optimize animations, but remove it when not animating:

```css
.button {
  will-change: transform;
}

.button:not(:hover) {
  will-change: auto;
}
```

## Next Steps

- Learn about [Styling](/systems/heroui/docs/getting-started/styling) approaches
- Explore [Component](/systems/heroui/docs/components) examples
- View [Theming](/systems/heroui/docs/getting-started/theming) documentation

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