CSS Layout How to - Make inner child relative to its parent

Question

We would like to know how to make inner child relative to its parent.

Answer


<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
#box {<!--from  w w w.ja  v  a 2 s.  c o  m-->
  width: 200px;
  height: 200px;
  margin: 30px;
  position: relative;  
  background:#EEE;
}

#box>div.corner {
  display: block;
  position: absolute;
  width: 50px;
  height: 50px;
}

.top {
  top: 0px;
  border-top-style: solid;
}

.bottom {
  bottom: 0px;
  border-bottom-style: solid;
}

.left {
  left: 0px;
  border-left-style: solid;
}

.right {
  right: 0px;
  border-right-style: solid;
}
</style>
</head>
<body>
  <div id="box">
    <div class="corner top left"></div>
    <div class="corner top right"></div>
    <div class="content">content</div>
    <div class="corner bottom left"></div>
    <div class="corner bottom right"></div>
  </div>
</body>
</html>

The code above is rendered as follows: