CSS :popover-open pseudo-class

Definition and usage

CSS :popover-open Pseudo-classes are used to select and set the style of any element in the displayed popover state.

By default, browsers will display pop-ups in the middle of the viewport.

The default style of pop-ups in browsers is:

[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;
}

Therefore, to override the default style, you can use :popover-open Pseudo-class.

Example

Select and set the style of any element in the displayed popover state:

:popover-open {
  width: 150px;
  height: 150px;
  position: absolute;
  inset: unset;
  bottom: 25px;
  left: 25px;
  margin: 0;
  color: maroon;
  background-color: orange;
  font-size: 25px;
}

Try it yourself

CSS syntax

:popover-open {
  css declarations;
}

Technical details

Browser support

The numbers in the table specify the first browser version that fully supports this pseudo-class.

Related pages

Reference:HTML popover attribute