sp-switch

NPM 1.5.0

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Overview API Changelog

Overview

An <sp-switch> is used to turn an option on or off. Switches allow users to select the state of a single option at a time. Use a switch rather than a checkbox when activating (or deactivating) an option, instead of selecting.

Usage

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yarn add @spectrum-web-components/switch

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

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

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

import { Switch } from '@spectrum-web-components/switch';

Anatomy

A switch consists of a switch input and slotted label.

<sp-switch>Email notifications</sp-switch>

Checked

A switch can be checked by setting the checked property/attribute.

<sp-field-group vertical>
    <sp-switch>Not checked</sp-switch>
    <sp-switch checked>Checked</sp-switch>
</sp-field-group>

Options

Sizes

Small Medium 
<sp-switch size="m">Medium</sp-switch>
 Large Extra Large

Emphasized

Emphasized switches, which use the empahasized attribute/property are a secondary style for switches. The blue color provides a visual prominence that is optimal for forms, settings, etc. where the switches need to be noticed.

<sp-field-group vertical>
    <sp-switch emphasized>Emphasized</sp-switch>
    <sp-switch emphasized checked>Emphasized and checked</sp-switch>
</sp-field-group>

States

A switch can be disabled using the disabled property/attribute.

<sp-field-group vertical>
    <sp-switch disabled>Disabled</sp-switch>
    <sp-switch disabled checked>Disabled and checked</sp-switch>
</sp-field-group>

Behaviors

Handling events

Event handlers for clicks and other user actions can be registered on an <sp-switch> similar to a standard <input type="checkbox"> element.

<sp-switch id="switch-example" onclick="spAlert(this, '<sp-switch> clicked!')">
    Web component
</sp-switch>

Accessibility

Switch are rendered in HTML using the <input type="checkbox"> element with the appropriate accessibility role, switch. When the Switch is checked, the appropriate ARIA state attribute will automatically be applied.

Include a label

A switch is required to have either a visible text label nested inside <sp-switch> itself.

<sp-switch>Email notifications</sp-switch>

Standalone switches should be used in situations where the context is clear without an associated text label. For example, a switch located at the top of a panel next to the panel's title makes it clear that the switch will enable/disable the panel options.

In those cases, you can use CSS to visually hide the text label.

<div id="settings">
    <sp-field-label for="notifications-settings">Notifications</sp-field-label>
    <sp-switch id="notify">
        <span class="visually-hidden">Notifications</span>
    </sp-switch>
    <sp-field-group id="notifications-settings" vertical>
        <sp-switch disabled>Email</sp-switch>
        <sp-switch disabled>Telephone</sp-switch>
        <sp-switch disabled>Text</sp-switch>
    </sp-field-group>
</div>

<style>
    .visually-hidden {
        clip: rect(0 0 0 0);
        clip-path: inset(50%);
        height: 1px;
        overflow: hidden;
        position: absolute;
        white-space: nowrap;
        width: 1px;
    }
    #settings {
        display: grid;
        grid-gap: 10px;
        grid-template-columns: calc(100% - 50px) 50px;
    }
    #notifications-settings {
        grid-column: 1 / 3;
        grid-row: 2;
    }
</style>