We would like to know how to calc(100% - 5px);.
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
.container {<!--from w w w . ja v a 2 s .c o m-->
width: 120px;
height: 100px;
margin: 0;
padding: 0;
clear: both;
background-color: blue;
}
.child {
width: calc(100% - 5px);
height: calc(100% - 5px);
border: 5px solid red;
}
</style>
</head>
<body>
<div class="container">
<div class="child">text</div>
</div>
</body>
</html>
The code above is rendered as follows: