---

title: CollapseWidth

---

# CollapseWidth

Renders a transition wrapping the element passed in the default slot and animating
it with a width animation.

## Props

| Name                | Description                                                                    | Type                 | Default           |
| ------------------- | ------------------------------------------------------------------------------ | -------------------- | ----------------- |
| <code>appear</code> | Indicates if the transition must be applied on the initial render of the node. | <code>boolean</code> | <code>true</code> |

## Slots

| Name                 | Description                                 | Bindings<br />(name - type - description) |
| -------------------- | ------------------------------------------- | ----------------------------------------- |
| <code>default</code> | (Required) to add content to the transition | None                                      |

## Examples

The CollapseWidth component is intended to be used as animation to wrap an element with `v-if` or
`v-show` and animate its width. The animation scales its width from 0 to auto. This transition does not work with components that have horizontal margin, padding, or border. It also depends on the width of the child elements and not the root element.

### Basic usage with `v-if`

```vue
<template>
  <CollapseWidth>
    <ComponentOrElement v-if="open" />
  </CollapseWidth>
</template>

<script setup>
import { ref } from "vue";
import CollapseWidth from "@empathyco/x-components/js/components/animations/collapse-width.vue";

const open = ref(false);
</script>
```

### Usage with `v-show`

```vue
<template>
  <CollapseWidth>
    <ComponentOrElement v-show="open" />
  </CollapseWidth>
</template>

<script setup>
import { ref } from "vue";
import CollapseWidth from "@empathyco/x-components/js/components/animations/collapse-width.vue";

const open = ref(true);
</script>
```

### Example with dynamic content

```vue
<template>
  <div>
    <button @click="open = !open">Toggle</button>
    <CollapseWidth>
      <div v-if="open" style="width: 200px; background: #eee;">
        Expanded content
      </div>
      <div v-else style="width: 50px; background: #ccc;">Collapsed content</div>
    </CollapseWidth>
  </div>
</template>

<script setup>
import { ref } from "vue";
import CollapseWidth from "@empathyco/x-components/js/components/animations/collapse-width.vue";

const open = ref(false);
</script>
```