Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
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.
css
:popover-open {
/* ... */
}
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;
}
| Specification |
|---|
| HTML Standard # selector-popover-open |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
:popover-open |
114 | 114 | 114 | No | 100 | 17 | 114 | 114 | No | No | 17 | No |
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https://developer.mozilla.org/en-US/docs/Web/CSS/:popover-open