30-seconds-of-code/fullscreen.md

Fullscreen

The :fullscreen CSS pseudo-class represents an element that's displayed when the browser is in fullscreen mode.

HTML

<div class="container">
  <p><em>Click the button below to enter the element into fullscreen mode. </em></p>
  <div class="element" id="element">
    <p>I'm in fullscreen mode!</p>
  </div>
  <br>
  <button onclick="var el = document.getElementById('element'); el.webkitRequestFullscreen();">Go Full Screen!</button>
</div>

CSS

.container {
  margin: 40px auto;
  max-width: 700px;
}

.element {
  padding: 20px;
  height: 300px;
  width: 100%;
  background-color: skyblue;
}

.element p {
  text-align: center;
  color: white;
  font-size: 3em;
}

.element:-ms-fullscreen p {
  visibility: visible;
}

.element:fullscreen {
  background-color: #e4708a;
  width: 100vw;
  height: 100vh;
}

Demo

Click the button below to enter the element into fullscreen mode.

I'm in fullscreen mode!

Go Full Screen!

<style> .container { margin: 40px auto; max-width: 700px; } .element { padding: 20px; height: 300px; width: 100%; background-color: skyblue; } .element p { text-align: center; color: white; font-size: 3em; } .element:-ms-fullscreen p { visibility: visible; } .element:fullscreen { background-color: #e4708a; width: 100vw; height: 100vh; } </style>

Explanation

1. fullscreen CSS pseudo-class selector is used to select and style an element that is being displayed in full-screen mode.

Browser support

92%<

• https://developer.mozilla.org/en-US/docs/Web/CSS/:fullscreen