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# Aspect

> The `<b-aspect>` component can be used to maintain a minimum responsive aspect ratio for content.
> When the content is longer than the available height, then the component will expand vertically to
> fit all content. If the content is shorter than the computed aspect height, the component will
> ensure a minimum height is maintained.

## Overview

The default [aspect](<https://en.wikipedia.org/wiki/Aspect_ratio_(image)>) ratio is `1:1` (ratio of
`1`), which makes the height always be at least the same as the width. The `aspect` prop can be used
to specify an arbitrary aspect ratio (i.e. `1.5`) or a ratio as a string such as `'16:9'` or
`'4:3'`.

The width will always be 100% of the available width in the parent element/component.

```html
<template>
  <div>
    <b-form-group label="Aspect ratio" label-for="ratio" label-cols-md="auto" class="mb-3">
      <b-form-select id="ratio" v-model="aspect" :options="aspects"></b-form-select>
    </b-form-group>
    <b-card>
      <b-aspect :aspect="aspect">
        This will always be an aspect of "{{ aspect }}",
        except when the content is too tall.
      </b-aspect>
    </b-card>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        aspect: '16:9',
        aspects: [
          { text: '4:3 (SD)', value: '4:3' },
          { text: '1:1 (Square)', value: '1:1' },
          { text: '16:9 (HD)', value: '16:9' },
          { text: '1.85:1 (Widescreen)', value: '1.85:1' },
          { text: '2:1 (Univisium/Superscope)', value: '2:1' },
          { text: '21:9 (Anamorphic)', value: '21:9' },
          { text: '1.43:1 (IMAX)', value: '1.43:1' },
          { text: '3:2 (35mm Film)', value: '3:2' },
          { text: '3:1 (APS-P)', value: '3:1' },
          { text: '4/3 (Same as 4:3)', value: 4 / 3 },
          { text: '16/9 (Same as 16:9)', value: 16 / 9 },
          { text: '3 (Same as 3:1)', value: 3 },
          { text: '2 (Same as 2:1)', value: 2 },
          { text: '1.85 (Same as 1.85:1)', value: 1.85 },
          { text: '1.5', value: 1.5 },
          { text: '1 (Same as 1:1)', value: 1 }
        ]
      }
    }
  }
</script>

<!-- b-aspect.vue -->
```

## See also

- [`<b-embed>` component](/docs/components/embed) for responsive embeds (videos, iframes, etc.)