:fullscreen
Targets an element while it is being displayed in the browser's full-screen mode (e.g., when a video or a photo is expanded to fill the whole monitor).
Syntax
/* Usage Example */
video:fullscreen {
/* Keeps the background black during full-screen video playback */
background-color: black;
border: none;
}:fullscreen Browser support
Widely available
Since
2015 94% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.
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