HoverCard

Overlays component. This page is the API reference, generated from the source code. Usage guidance and live examples are on the Chinese page.

HeadlessStylesVueReactWeb Components

Anatomy

Parts in bold are required.

data-scope="hover-card": root · trigger · positioner · content · title · description · arrow

API reference

Descriptions of individual props, events and slots are written in Chinese and appear on the Chinese page.

Artifacts

Layer	Value
Custom element	<xh-hover-card>
Vue components	XhHoverCardArrow XhHoverCardContent XhHoverCardDescription XhHoverCardPositioner XhHoverCardRoot XhHoverCardTitle XhHoverCardTrigger
Composable	useHoverCard
State machine	hoverCardMachine
Skin	@xihan-ui/styles/hover-card.css

Props

Prop	Type	Required
open	boolean
defaultOpen	boolean
placement	Placement
offset	number
openDelay	number
closeDelay	number
dir	Direction
parts	TitleDescriptionParts
disabled	boolean
size	Size
onOpenChange	(details: HoverCardOpenChangeDetails) => void

Events

Custom elements put the payload in detail; Vue emits an event of the same name.

Event	Payload
open-change	HoverCardOpenChangeDetails

Slots

Only slots with a payload are listed.

Vue component	Slot	Payload
XhHoverCardRoot	default	HoverCardRootSlotProps

React adapter props

Only the props each component declares itself: DOM attributes inherited from ComponentPropsWithRef are left out, and root props already listed in the Props table are not repeated. The Vue counterpart is the slot table above.

React component	Prop	Type	Required
XhHoverCardPositioner	container	() => Element | null
XhHoverCardRoot	children	SlotChildren<HoverCardRootSlotProps>

State

Public state is written to data-state.

Part	Values
root	'open' | 'closed'
trigger	'open' | 'closed'
positioner	'open' | 'closed'
content	'open' | 'closed'

The following names are internal to the state machine.

States: closed · opening · visible · visible.open · visible.closing

Events: POINTER.ENTER · POINTER.LEAVE · FOCUS · BLUR · ESCAPE · OPEN · CLOSE · after.openDelay · after.closeDelay · CONTROLLED.OPEN · CONTROLLED.CLOSE

Guards: isOpenControlled · isDisabled · isFocusHeld

connect API

getXxxProps() returns the host attributes of the matching part.

Member	Type
open	boolean
setOpen	(next: boolean) => void
getRootProps	() => T['element']
getTriggerProps	() => T['button']
getPositionerProps	() => T['element']
getContentProps	() => T['element']
getTitleProps	() => T['element']
getDescriptionProps	() => T['element']
getArrowProps	() => T['element']

Accessibility

Keyboard

Specification: W3C APG. Each row is a stable behavior id that the conformance tests cover; the conditions and effects are described on the Chinese page.

Keys	Behavior
Tab / Shift+Tab	hover-card.kbd.focus-trigger
Escape	hover-card.kbd.escape

ARIA

These attributes are produced by connect.

Part	Attribute	Value
trigger	aria-controls	id of the content part
trigger	aria-expanded	'true' | 'false'
trigger	aria-haspopup	'dialog'
content	aria-describedby	id of the description part | undefined
content	aria-hidden	!open || undefined
content	aria-labelledby	id of the title part | id of the trigger part
content	aria-modal	'false'
content	role	'dialog'
arrow	aria-hidden	'true'

Style reference

Skin

@xihan-ui/styles/hover-card.css is written against [data-scope="hover-card"][data-part="root"] part selectors; the published build uses the mount class .xh-scope-hover-card in place of data-scope (same specificity) and sits in the xihan.components layer. Put overrides in xihan.overrides; the part selectors work as usual.

Data attributes

Produced by connect; valueless attributes are omitted while their condition does not hold.

Part	Attribute	Value
root	data-disabled	'' (present only while the condition holds)
root	data-state	'open' | 'closed'
trigger	data-disabled	'' (present only while the condition holds)
trigger	data-state	'open' | 'closed'
positioner	data-hidden	'' (present only while the condition holds)
positioner	data-placement	actual placement computed by the positioning engine
positioner	data-positioned	'' (present only while the condition holds)
positioner	data-state	'open' | 'closed'
content	data-instant	'' (present only while the condition holds)
content	data-placement	actual placement computed by the positioning engine
content	data-size	props.size
content	data-state	'open' | 'closed'
content	data-xh-material	'frosted'
arrow	data-placement	actual placement computed by the positioning engine

CSS variables

The public override slots, generated from what the standalone skin actually consumes.

Variable	Part	CSS property	State	Default from
--xh-hover-card-arrow-size	arrow	--xh-_overlay-arrow-size	default	--xh-overlay-arrow-size
--xh-hover-card-backdrop	content	-webkit-backdrop-filter backdrop-filter	xh-material=frosted	--xh-_material-backdrop
--xh-hover-card-bg	arrow content	background	default not([data-xh-action-control]) xh-material=frosted	--xh-_material-bg --xh-material-frosted-bg
--xh-hover-card-border	arrow content	border	default not([data-xh-action-control]) xh-material=frosted	--xh-_material-border --xh-material-frosted-border
--xh-hover-card-description-fg	description	color	default	--xh-fg-muted
--xh-hover-card-description-font-size	description	font-size	default	--xh-text-body-size
--xh-hover-card-fg	content	color	not([data-xh-action-control]) xh-material=frosted	--xh-_material-fg
--xh-hover-card-gap	content	gap	default	--xh-space-1
--xh-hover-card-layer	positioner	z-index	default	--xh-_layer
--xh-hover-card-max-h	content	max-block-size	default	--xh-overlay-max-h
--xh-hover-card-max-w	content	max-inline-size	default	--xh-_hover-card-max-w
--xh-hover-card-px	content	padding-inline	default	--xh-_hover-card-px
--xh-hover-card-py	content	padding-block	default	--xh-_hover-card-py
--xh-hover-card-radius	content	border-radius	default	--xh-shape-overlay
--xh-hover-card-shadow	content	box-shadow	not([data-xh-action-control]) xh-material=frosted	--xh-_material-shadow
--xh-hover-card-title-fg	title	color	default	--xh-fg-default
--xh-hover-card-title-font-size	title	font-size	default	--xh-text-label-size
--xh-hover-card-title-font-weight	title	font-weight	default	--xh-font-weight-medium
--xh-hover-card-trigger-gap	trigger	gap	default	--xh-control-gap-sm