CSS Layout How to - Set media max-width

Question

We would like to know how to set media max-width.

Answer


<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
div {<!-- w w w  .  j  a  v a  2 s  . c o  m-->
  background: green;
  width: 300px
}

@media only screen and (max-width:400px) {
  div {
    background: red;
  }
}
</style>
</head>
<body>
  <div>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
  </div>
</body>
</html>

The code above is rendered as follows: