30-seconds-of-code/snippets/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 change color in fullscreen mode!</p>
  </div>
  <br>
  <button onclick="var el = document.getElementById('element'); el.requestFullscreen();">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

Explanation

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

Browser support

83.38

• https://developer.mozilla.org/en-US/docs/Web/CSS/:fullscreen
• https://caniuse.com/#feat=fullscreen