Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $(window).resize(function() {
    if ($(this).width() < 728) {
      $("body").css("background-color", "yellow");
    } else {
      $("body").css("background-color", "pink");
    }
  });
});
</script>
</head>
<body>

<p>Resize the window to change background-color (make the screen's width smaller and larger).</p>

</body>
</html>