Parameters

Name	Type	Default	Description
isCollapsible	boolean | CollapsibleConfig | MaybeRefOrGetter	true	Whether collapsible behavior is active. true manages its own state and starts open. false disables folding. Pass a config object for controlled mode or a custom default.
value	string | undefined | MaybeRefOrGetter	—	Unique identifier within a CollapsibleGroup. When present and inside a group, the group owns the state.
group	CollapsibleGroupContextValue | null	injected	Group context. Read from the nearest CollapsibleGroup when omitted; pass it explicitly only when you are outside that tree.

CollapsibleConfig

Field	Type	Default	Description
isOpen	Ref<boolean | undefined>	—	Controlled open state, usually the v-model:isOpen model ref. Leave it out for uncontrolled state.
defaultIsOpen	boolean | MaybeRefOrGetter	true	Open state while isOpen stays unbound.
onOpenChange	(isOpen: boolean) => void	—	Called with the requested state. In controlled usage it is the request; in uncontrolled usage it is the report.

Returns

Field	Type	Description
isEnabled	ComputedRef<boolean>	Whether collapsible behavior is active. False when isCollapsible is false.
isOpen	ComputedRef<boolean>	Whether the content is currently expanded.
toggle	() => void	Toggle open/closed state. Dispatches to the group, the controlled ref, or internal state.