c2n/web-componentsv0.0.6
GitHub repository

Overlay

Anchored popup built on the browser Popover API, positioned with floating-ui.

Attributes

NameTypeDefaultDescription
openbooleanfalseOpen state, kept in sync with the native popover (setting it shows or hides the popover).
placementPlacementbottom-startPreferred placement (floating-ui names). The one in use is reflected as `current-placement`.
disabled-cross-axisbooleanfalseDo not flip across the cross axis when there is no room (only along the main axis).
fit-anchorbooleanfalseMake the overlay exactly as wide as the anchor.
free-widthbooleanfalseBy default the overlay is at least as wide as its anchor; set this to size it by its content only.
anchorstring | HTMLElement | undefinedundefinedAnchor element, or (attribute) the id of the anchor. Falls back to the element whose `popovertarget` is this overlay's id.

Events

NameTypeDescription
toggleToggleEventNative popover toggle: `newState` is `open` or `closed`.
beforetoggleToggleEventNative, cancelable, fired before the state changes.

CSS custom properties

Grouped by the element and state they target. Click a group to collapse it; click a name to copy it.

NameTypeDefaultDescription
--c2-overlay--offset-ypixel8pxDistance between the anchor and the overlay along the main axis.
--c2-overlay--offset-xpixel0pxShift along the cross axis (towards the end for `*-start`, the start for `*-end`).
--c2-overlay--viewport-paddingpixel8pxMinimum gap kept between the overlay and the viewport edges.
--c2-overlay--transition-durationtime150msOpen/close fade and scale; `0ms` disables it.
--c2-overlay__backdrop--backgroundcolortransparentThe `::backdrop` behind the popover.
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