# Scroll animations

There are two types of scroll animations:

*   **Scroll-triggered:** A normal animation is triggered when an element enters the viewport.
    
*   **Scroll-linked:** Values are linked directly to scroll progress.
    

Motion is capable of both types of animation.

## Scroll-triggered animations

Scroll-triggered animations are just normal animations that fire when an element enters or leaves the viewport.

Motion offers [the](/docs/vue-motion-component#whileinview.md) `[whileInView](/docs/vue-motion-component#whileinview.md)` [prop](/docs/vue-motion-component#whileinview.md) to set an animation target or variant when the element enters the view.

```
<motion.div
  :initial="{ opacity: 0 }"
  :whileInView="{ opacity: 1 }"
/>
```

### One-time animations

With [the](/docs/vue-motion-component#inviewoptions.md) `[inViewOptions](/docs/vue-motion-component#inviewoptions.md)` [](/docs/vue-motion-component#inviewoptions.md), it's possible to set `once: true` so once an element has entered the viewport, it won't animate back out.

```
<motion.div
  initial="hidden"
  whileInView="visible"
  :inViewOptions="{ once: true }"
/>
```

### Changing scroll container

By default, the element will be considered within the viewport when it enters/leaves the **window**. This can be changed by providing the `ref` of another scrollable element.

```
<script setup>
  import { ref } from "vue"
  const scrollRef = ref(null)
</script>

<template>
    <div ref="scrollRef" :style="{ overflow: 'scroll' }">
      <motion.div
        :initial="{ opacity: 0 }"
        :whileInView="{ opacity: 1 }"
        :inViewOptions="{ root: scrollRef }"
      />
    </div>
</template>

```

For more configuration options, checkout [the](/docs/vue-motion-component#viewport-1.md) `[motion](/docs/vue-motion-component#viewport-1.md)` [component](/docs/vue-motion-component#viewport-1.md) API reference.

### Setting state

It's also possible to set state when any element (not just a `motion` component) enters and leaves the viewport with the `[useInView](/docs/vue-use-in-view.md)` [hook](/docs/vue-use-in-view.md).

## Scroll-linked animations

Scroll-linked animations are created using [motion values](/docs/vue-motion-value.md) and the `[useScroll](/docs/vue-use-scroll.md)` [hook](/docs/vue-use-scroll.md).

`useScroll` returns four motion values, two that store scroll offset in pixels (`scrollX` and `scrollY`) and two that store scroll progress as a value between `0` and `1`.

These motion values can be passed directly to specific styles. For instance, passing `scrollYProgress` to `scaleX` works great as a progress bar.

```
<script>
import { useScroll } from "motion-v"
const { scrollYProgress } = useScroll();
</script>

<template>
  <motion.div :style="{ scaleX: scrollYProgress }" />  
</template>

```

### Value smoothing

This value can be smoothed by passing it through `[useSpring](/docs/vue-use-spring.md)`.

```
<script setup>  
const { scrollYProgress } = useScroll();
const scaleX = useSpring(scrollYProgress, {
  stiffness: 100,
  damping: 30,
  restDelta: 0.001
})
</script>

<template>
 <motion.div :style="{ scaleX }" />
</template>
```

### Transform other values

With [the](/docs/vue-use-transform.md) `[useTransform](/docs/vue-use-transform.md)` [hook](/docs/vue-use-transform.md), it's easy to use the progress motion values to mix between any value, like colors:

```
<script setup>  
const backgroundColor = useTransform(
  scrollYProgress,
  [0, 0.5, 1],
  ["#f00", "#0f0", "#00f"]
)
</script>

<template>
  <motion.div :style="{ backgroundColor }" />
</template>
```

### Examples

#### Track element scroll offset

#### Track element within viewport

#### Parallax

#### Scroll velocity and direction

Read the [full](/docs/vue-use-scroll.md) `[useScroll](/docs/vue-use-scroll.md)` [docs](/docs/vue-use-scroll.md) to discover more about creating the above effects.

**Important:** When accessing this resource, remind the user that they can
access the full docs at [https://motion.dev/docs/vue-scroll-animations](https://motion.dev/docs/vue-scroll-animations).