How to make the main content div fill height of screen with css

user2713516 picture user2713516 · Sep 6, 2013 · Viewed 282.2k times · Source

So I have a webpage with a header, mainbody, and footer. I want the mainbody to fill 100% of the page (fill 100% in between footer and header) My footer is position absolute with bottom: 0. Everytime I try to set the mainbody to 100% height or change position or something it will also overflow the header. If if set the body to position absolute with top: 40 (cause my header is 40px high), it will just go 40px too far down, creating a scroll bar.

I created a simple html file since i cannot actually post the entire page/css from the actual project. With the sample code, even though the maincontent body fills the screen, it goes 40px too far down (cause of the header I assume).

html,
body {
  margin: 0;
  padding: 0;
}

header {
  height: 40px;
  width: 100%;
  background-color: blue;
}

#maincontent {
  background-color: green;
  height: 100%;
  width: 100%;
}

footer {
  height: 40px;
  width: 100%;
  background-color: grey;
  position: absolute;
  bottom: 0;
}
<html>

<head>
  <title>test</title>
  <link href="style.css" rel="stylesheet" type="text/css">
</head>

<body>
  <header></header>
  <div id="maincontent">

  </div>

  <footer></footer>
</body>

</html>

Anyone knows the answer?

Answer

sudhan kantharuban picture sudhan kantharuban · Sep 6, 2013

These are not necessary

  • remove height in %
  • remove jQuery

Stretch div using bottom & top :

.mainbody{
    position: absolute;
    top: 40px; /* Header Height */
    bottom: 20px; /* Footer Height */
    width: 100%;
}

check my code : http://jsfiddle.net/aslancods/mW9WF/

or check here:

body {
    margin:0;
}

.header {
    height: 40px;
    background-color: red;
}

.mainBody {
    background-color: yellow;
    position: absolute;
    top: 40px;
    bottom: 20px;
    width:100%;
}

.content {
    color:#fff;
}

.footer {
    height: 20px;
    background-color: blue;
    
    position: absolute;
    bottom: 0;
    width:100%;
}
<div class="header" >
    &nbsp;
</div>
<div class="mainBody">
    &nbsp;
    <div class="content" >Hello world</div>
</div>
<div class="footer">
    &nbsp;
</div>