CSS :fullscreen Pseudo Class

The :fullscreen pseudo-class selects and styles an element that is being displayed in fullscreen mode.

The :fullscreen selector works when the fullscreen mode is entered.

The :fullscreen selector works with the -webkit-, -moz-, -ms- prefixes for maximum browser compatibility.

Version

Syntax

:fullscreen {
  css declarations;
}

In the following example, click the button to see the element in fullscreen mode.

Example of the :fullscreen selector:

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
    <style>
      .example {
        padding: 10px;
        height: 200px;
        width: 95%;
        background-color: #1c87c9;
      }
      .example p {
        visibility: hidden;
        text-align: center;
        color: #eeeeee;
        font-size: 3em;
      }
      .example:-webkit-full-screen {
        background-color: #8ebf42;
        width: 100vw;
        height: 100vh;
      }
      .example:-webkit-full-screen p {
        visibility: visible;
      }
      .example:-moz-full-screen {
        background-color: #8ebf42;
        width: 100vw;
        height: 100vh;
      }
      .example:-moz-full-screen p {
        visibility: visible;
      }
      .example:-ms-fullscreen {
        background-color: #8ebf42;
        width: 100vw;
        height: 100vh;
      }
      .example:-ms-fullscreen p {
        visibility: visible;
      }
      .example:fullscreen {
        background-color: #8ebf42;
        width: 100vw;
        height: 100vh;
      }
      .example:fullscreen p {
        visibility: visible;
      }
    </style>
  </head>
  <body>
    <h2>:fullscreen pseudo-class example</h2>
    <div class="container">
      <div class="example" id="example">
        <p>Fullscreen mode</p>
      </div>
      <br>
      <button onclick="var el=document.getElementById('example'); el.webkitRequestFullscreen();">Click here</button>
    </div>
  </body>
</html>