Collapsible

Style native disclosure groups without replacing details. CSS only

Choosing between components

Use Collapsible for a stack of expandable regions. For one standalone region, Disclosure is the same <details> element with lighter styling.

Collapsible

Copy this markup

<div>
  <details class="ui-collapsible" open>
    <summary>What ships?</summary>
    <div>
      <p>CSS, explicit element definitions, and public types.</p>
    </div>
  </details>
</div>

Install

Styles and registration

import '@timelessui/components/css/tokens.css'
import '@timelessui/components/css/collapsible.css'

Attributes

Every value below is implemented by the stylesheets this component ships. Boolean attributes are presence-based: author the attribute with no value, or omit it.

Attribute	Values	Default	Description
data-ui-density	compact · normal	normal	Summary and content padding.

Styling

Root identity: ui-collapsible. Required stylesheets: tokens.css, collapsible.css.

This component adds no custom properties of its own. Restyle it through the design tokens or your own CSS.

Design tokens this component reads (10)

These are global Atmosphere tokens. Change them once at the theme level rather than per component.

--ui-accent · --ui-duration-fast · --ui-ease-standard · --ui-fg · --ui-fg-muted · --ui-focus · --ui-line · --ui-space-3 · --ui-space-4 · --ui-space-5

Accessibility

Keep the native elements, roles, and relationships shown in the example. Timeless adds only the state and keyboard coordination the platform does not already provide, and it never supplies your accessible names — those depend on your content.

Before JavaScript runs

This primitive is CSS only. There is nothing to register and nothing to wait for.

More examples

Open Collapsible in StoryLite for variants, controls, and manual testing.