Overview

An sp-thumbnail can be used in a variety of locations as a way to display a preview of an image, layer, or effect.

Usage

yarn add @spectrum-web-components/thumbnail

Import the side effectful registration of <sp-thumbnail> via:

import '@spectrum-web-components/thumbnail/sp-thumbnail.js';

When looking to leverage the Thumbnail base class as a type and/or for extension purposes, do so via:

import { Thumbnail } from '@spectrum-web-components/thumbnail';

Options

Sizes

<sp-thumbnail size="50">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="75">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="100">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="200">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="300">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="400">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="500">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="600">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="700">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="800">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="900">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="1000">
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

Representing non-square content

By default, an sp-thumbnail will ensure that the entirety of the content that it respresents is visible by letterboxing that content with a checkerboard background when its aspect ratio is not square.

<div style="display: flex; gap: var(--spectrum-spacing-100);">
  <sp-thumbnail>
    <img src="https://picsum.photos/300/400" alt="Demo Image" />
  </sp-thumbnail>

  <sp-thumbnail>
    <img src="https://picsum.photos/500/100" alt="Demo Image" />
  </sp-thumbnail>
</div>

The background attribute takes a string value of the CSS "background" property in order to customize the letterboxing.

<div style="display: flex; gap: var(--spectrum-spacing-100);">
  <sp-thumbnail background="red">
    <img src="https://picsum.photos/300/400" alt="Demo Image" />
  </sp-thumbnail>

  <sp-thumbnail background="#00ff00">
    <img src="https://picsum.photos/500/100" alt="Demo Image" />
  </sp-thumbnail>
</div>

The cover attribute will cause the content to fill the space provided by the sp-thumbnail element:

<div style="display: flex; gap: var(--spectrum-spacing-100);">
  <sp-thumbnail cover>
    <img src="https://picsum.photos/300/400" alt="Demo Image" />
  </sp-thumbnail>

  <sp-thumbnail cover>
    <img src="https://picsum.photos/500/100" alt="Demo Image" />
  </sp-thumbnail>
</div>

Layer and Layer Selected

For when sp-thumbail is used in layer management (such as the Compact or Detail Layers panels). The thumbnail is given a thick blue border to indicate its selection when used in layer management.

<div style="display: flex; gap: var(--spectrum-spacing-100);">
  <sp-thumbnail layer>
    <img src="https://picsum.photos/400/400" alt="Demo Image" />
  </sp-thumbnail>

  <sp-thumbnail layer selected>
    <img src="https://picsum.photos/500/100" alt="Demo Image" />
  </sp-thumbnail>
</div>

States

Focused

When focused the sp-thumbnail element will be displayed as follows:

<sp-thumbnail focused>
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

Disabled

Thumbnail should only be displayed as disabled if the entire component is also disabled. When disabled the sp-thumbnail element will be displayed as follows:

<sp-thumbnail disabled>
  <img src="https://picsum.photos/100/100" alt="Demo Image" />
</sp-thumbnail>

Accessibility

alt attributes must be set on the img element inside of the sp-thumbnail element.