Disclosure

A disclosure hides one block of content behind a button. It is Headless UI's Disclosure in a bordered card: the button spans the top, the chevron turns when open, and the panel unmounts while closed. For a stack of these where only one is open at a time, use Accordion.

import Disclosure from '@zuilib/components/disclosure'

Basic

Loading example

Open by default

Headless UI's Disclosure is uncontrolled, so defaultOpen sets the initial state and the button owns it from there. There is no open/onChange pair. The current state is readable from data-state on the root.

Loading example

With form controls

panelClassName is merged onto the panel, which is the usual place for spacing between fields. title accepts any node.

Loading example

Props

DisclosureProps extends the <div> attributes of the root card (minus title and children) with:

Prop	Type	Default	Description
titlerequired	ReactNode	—	Contents of the toggle button
childrenrequired	ReactNode	—	Contents of the panel; unmounted while closed
defaultOpen	boolean	false	Initial state; the component is uncontrolled
className	string	—	Merged last onto the root card
buttonClassName	string	—	Merged last onto the toggle button
panelClassName	string	—	Merged last onto the panel

Slots

Slot	Element	Notes
[data-slot="disclosure"]	div	Root card. data-state="open" | "closed"
[data-slot="disclosure-button"]	button	The toggle. Headless UI adds data-open, data-hover, data-focus, data-disabled
[data-slot="disclosure-title"]	span	Wraps title inside the button
[data-slot="disclosure-icon"]	svg	Chevron; rotated 180° while open
[data-slot="disclosure-panel"]	div	The content; present only while open

/* Consumer CSS: flat, borderless disclosures */
[data-slot="disclosure"] {
  border: 0;
  border-radius: 0;
}
[data-slot="disclosure"][data-state="open"] > [data-slot="disclosure-button"] {
  background-color: var(--muted);
}

Tokens

Token	Used for
--border, --card	Card border and background
--foreground, --muted-foreground	Title text and chevron
--muted	Button hover (at 50%)
--radius-lg	Card corners
--ring	Keyboard focus ring (inset)
--duration-fast, --duration-normal	Hover colour and chevron rotation

Accessibility

• The toggle is a real <button> with aria-expanded and aria-controls pointing at the panel (Headless UI).
• Enter and Space toggle; the button is in the normal tab order.
• Keyboard focus draws an inset 2px --ring ring so it stays inside the card's rounded border.
• The chevron rotation respects prefers-reduced-motion.
• The panel is unmounted while closed, so hidden content is not reachable by assistive technology or tab.

Related

• Accordion: several disclosures, one open at a time.
• Tabs: switching between peers rather than hiding one block.