@spectrum-web-components/thumbnail

Description

An sp-thumbnail can be used in a variety of locations as a way to display a preview of an image, layer, or effect. sp-thumbnail elements are not keyboard-focusable since they're intended to be used inside of a component that a user sets focus to (such as select lists or tree items).

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';

Sizes

Small Medium Large Extra Large

<sp-thumbnail size="s">
    <img src="https://place.dog/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="m">
    <img src="https://place.dog/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="l">
    <img src="https://place.dog/100/100" alt="Demo Image" />
</sp-thumbnail>

<sp-thumbnail size="xl">
    <img src="https://place.dog/100/100" alt="Demo Image" />
</sp-thumbnail>

Focused or selected

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

<div style="display: flex; gap: var(--spectrum-global-dimension-size-100);">
    <sp-thumbnail focused>
        <img src="https://place.dog/100/100" alt="Demo Image" />
    </sp-thumbnail>
    <sp-thumbnail selected>
        <img src="https://place.dog/100/100" alt="Demo Image" />
    </sp-thumbnail>
</div>

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-global-dimension-size-100);">
    <sp-thumbnail>
        <img src="https://place.dog/300/400" alt="Eiffel Tower at night" />
    </sp-thumbnail>

    <sp-thumbnail>
        <img
            src="https://place.dog/500/100"
            alt="Landscape with mountains and lake"
        />
    </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-global-dimension-size-100);">
    <sp-thumbnail background="red">
        <img src="https://place.dog/300/400" alt="Eiffel Tower at night" />
    </sp-thumbnail>

    <sp-thumbnail background="#00ff00">
        <img
            src="https://place.dog/500/100"
            alt="Landscape with mountains and lake"
        />
    </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-global-dimension-size-100);">
    <sp-thumbnail cover>
        <img src="https://place.dog/300/400" alt="Eiffel Tower at night" />
    </sp-thumbnail>

    <sp-thumbnail cover>
        <img
            src="https://place.dog/500/100"
            alt="Landscape with mountains and lake"
        />
    </sp-thumbnail>
</div>