CSS :fullscreen Selector

Set the background color to yellow when the page is in full-screen mode:

:fullscreen {
background-color: yellow;
}

Definition and Usage

The :fullscreen selector is used to select the element(s) that is in full-screen mode.

The numbers in the table specifies the first browser version that fully supports the selector.

Selector
:fullscreen	71.0 15.0 -webkit-	12.0 11.0 -ms-	64.0 9.0 -moz-	3.1 -webkit-	58.0 15.0 -webkit-

:fullscreen {
css declarations;
}