jQuery has Method Example

<!DOCTYPE html>
<html>
<head>
<title>jQuery Demo example</title>
 <script type="text/javascript" src="http://code.jquery.com/jquery-2.1.4.min.js">
 </script>
<script type="text/javascript">
         $(document).ready(function(){      
                 $( "#hasExample" ).on( "click", function(event) {             
                 $("div").has("span").css("background","green");
              });
});
</script>
<style>
div{
margin:10px;
height:100px;
width:100px;
border:2px solid red;
float:left;

}
</style>

</head>	
<body>
<h4 ><a href="javascript:void(0);" id="hasExample">Click to run .has("span") Example </a></h4> 
<div>0</div>
<div><span>1 (Contains span...)</span></div>
<div>2</div>
<div><span>3 (Contains span...)</span></div>
<div>4</div>
<div>5</div>
<div><span>6(Contains span...)</span></div>
<div>7</div>
<div>8</div>

<div></div>

</body>
</html>