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How to make a <div> always full screen?

This always works for me:

<head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <style type="text/css">
        html, body {
            height: 100%;
            margin: 0;
        }

        #wrapper {
            min-height: 100%; 
        }
    </style>
    <!--[if lte IE 6]>
    <style type="text/css">
        #container {
            height: 100%;
        }
    </style>
    <![endif]-->
</head>

<body>
    <div id="wrapper">some content</div>
</body>

This is probably the simplest solution to this problem. Only need to set four CSS attributes (although one of them is only to make IE happy).


This is my solution to create a fullscreen div, using pure css. It displays a full screen div that is persistent on scrolling. And if the page content fits on the screen, the page won't show a scroll-bar.

Tested in IE9+, Firefox 13+, Chrome 21+

<!doctype html>
<html>
<head>
  <meta charset="utf-8" />
  <title> Fullscreen Div </title>
  <style>
  .overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: rgba(51,51,51,0.7);
    z-index: 10;
  }
  </style>
</head>
<body>
  <div class='overlay'>Selectable text</div>
  <p> This paragraph is located below the overlay, and cannot be selected because of that :)</p>
</body>
</html>

This is the most stable (and easy) way to do it, and it works in all modern browsers:

.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  overflow: auto;
  background: lime; /* Just to visualize the extent */
  
}
<div class="fullscreen">
  Suspendisse aliquam in ante a ornare. Pellentesque quis sapien sit amet dolor euismod congue. Donec non semper arcu. Sed tortor ante, cursus in dui vitae, interdum vestibulum massa. Suspendisse aliquam in ante a ornare. Pellentesque quis sapien sit amet dolor euismod congue. Donec non semper arcu. Sed tortor ante, cursus in dui vitae, interdum vestibulum massa. Suspendisse aliquam in ante a ornare. Pellentesque quis sapien sit amet dolor euismod congue. Donec non semper arcu. Sed tortor ante, cursus in dui vitae, interdum vestibulum massa. Suspendisse aliquam in ante a ornare. Pellentesque quis sapien sit amet dolor euismod congue. Donec non semper arcu. Sed tortor ante, cursus in dui vitae, interdum vestibulum massa.
</div>

Tested to work in Firefox, Chrome, Opera, Vivaldi, IE7+ (based on emulation in IE11).


The best way to do this with modern browsers would be to make use of Viewport-percentage Lengths, falling back to regular percentage lengths for browsers which do not support those units.

Viewport-percentage lengths are based upon the length of the viewport itself. The two units we will use here are vh (viewport height) and vw (viewport width). 100vh is equal to 100% of the height of the viewport, and 100vw is equal to 100% of the width of the viewport.

Assuming the following HTML:

<body>
    <div></div>
</body>

You can use the following:

html, body, div {
    /* Height and width fallback for older browsers. */
    height: 100%;
    width: 100%;

    /* Set the height to match that of the viewport. */
    height: 100vh;

    /* Set the width to match that of the viewport. */
    width: 100vw;

    /* Remove any browser-default margins. */
    margin: 0;
}

Here is a JSFiddle demo which shows the div element filling both the height and width of the result frame. If you resize the result frame, the div element resizes accordingly.