:popover-open

Baseline 2025
Newly available

Since January 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The :popover-open CSS pseudo-class represents a popover element (i.e. one with a popover attribute) that is in the showing state. You can use this to apply style to popover elements only when they are shown.

Syntax

css
:popover-open {
  /* ... */
}

Examples

By default, popovers appear in the middle of the viewport. The default styling is achieved like this in the UA stylesheet:

css
[popover] {
  position: fixed;
  inset: 0;
  width: fit-content;
  height: fit-content;
  margin: auto;
  border: solid;
  padding: 0.25em;
  overflow: auto;
  color: CanvasText;
  background-color: Canvas;
}

To override the default styles and get the popover to appear somewhere else on your viewport, you could need to override the above styles with something like this:

css
:popover-open {
  width: 200px;
  height: 100px;
  position: absolute;
  inset: unset;
  bottom: 5px;
  right: 5px;
  margin: 0;
}

Specifications

Specification
HTML
# selector-popover-open
Selectors Level 4
# selectordef-popover-open

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
:popover-open

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

See also