First Component

Let's add a Bookmark toggle. Press it once to turn it on, then again to turn it off.

If you haven't installed the packages yet, start with Installation.

Create the Component

Create bookmark-button.svelte next to your app component and render a Toggle:

<script lang="ts">
  import { Toggle } from "@ui-sdk/svelte/toggle"
</script>

<Toggle>Bookmark</Toggle>

Toggle renders a button. It keeps track of its pressed state, handles Enter and Space, and sets aria-pressed for screen readers.

Use It in Your App

In your app component (App.svelte here), import and render BookmarkButton:

<script lang="ts">
  import BookmarkButton from "./bookmark-button.svelte"
</script>

<BookmarkButton />

Open your app. You should see a button labeled Bookmark. Next, add styles so you can tell when it is pressed.

Add Styles

When the toggle is pressed, it has a data-pressed attribute. Use that attribute to change its appearance.

With Tailwind CSS configured in your app, add utility classes to class. The data-pressed: variant applies while the toggle is pressed:

<script lang="ts">
  import { Toggle } from "@ui-sdk/svelte/toggle"
</script>

<Toggle
  class="inline-flex h-8 items-center rounded-md border border-neutral-300 px-3 text-sm font-medium hover:bg-neutral-100 focus-visible:outline-2 focus-visible:outline-offset-2 data-pressed:bg-neutral-900 data-pressed:text-white"
>
  Bookmark
</Toggle>

Try the styled toggle:

Keep the label the same in both states. aria-pressed tells a screen reader whether the toggle is on.

Keep Going

• Toggle covers disabled states, controlled state, and groups of toggles.
• Components lists the other components you can add with the same install.
• Parts and Composition shows how to put a component with several parts together.
• State and Events shows how to read changes and control state from your app.
• Styling and Animation covers state attributes, CSS variables, and transitions.