jQuery Tutorial
jQuery Effects
jQuery HTML/CSS
jQuery Form
- jquery-serialize()
- jquery-serializearray()
jQuery Events
jQuery Misc
jQuery Questions
Miscellaneous
- jquery-vs-angularjs
jQuery MCQ
- jquery-mcq
jQuery UI
- 50+-jquery-ui
Interview Questions
- jquery-questions

jQuery hasClass()

The jQuery hasClass() method is used to check whether selected elements have specified class name or not. It returns TRUE if the specified class is present in any of the selected elements otherwise it returns FALSE.

Syntax:

Parameters of jQuery hasClass() method

Parameter	Description
className	It is a mandatory parameter. It specifies the name of the CSS class to search for in the selected elements.

Example of jQuery hasClass() method

Let's take an example to demonstrate jQuery hasClass() method.

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        alert($("p").hasClass("intro"));
    });
});
</script>
<style>
.intro {
    font-size: 150%;
    color: Blue;
}
</style>
</head>
<body>
<h1>Look here, I am a heading.</h1>
<p class="intro">This is a paragraph.</p>
<p>This is also a paragraph.</p>
<button>Click here to check if any p element have an "intro" class?</button>
</body>
</html>

Test it Now

jQuery hasClass() method example 2

Let's take another example to demonstrate jQuery hasClass() method.

<!DOCTYPE html>
<html>
<head>
<title>The Selecter Example</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$("#result1").text( $("p#pid1").hasClass("red") );
$("#result2").text( $("p#pid2").hasClass("red") );
});
</script>
<style>
.red { color:red; }
.blue { color:blue; }
</style>
</head>
<body>
<p class="red" id="pid1">This is first paragraph.</p>
<p class="blue" id="pid2">This is second paragraph.</p>
<div id="result1"></div>
<div id="result2"></div>
</body>
</html>

Test it Now

Here the first condition is true and the second is false. If we set the second paragraph class name ?blue? then both the conditions will be true.

jQuery hasClass() Example 3

<!DOCTYPE html>
<html>
<head>
<title>The Selecter Example</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$("#result1").text( $("p#pid1").hasClass("red") );
$("#result2").text( $("p#pid2").hasClass("blue") );
});
</script>
<style>
.red { color:red; }
.blue { color:blue; }
</style>
</head>
<body>
<p class="red" id="pid1">This is first paragraph.</p>
<p class="blue" id="pid2">This is second paragraph.</p>
<div id="result1"></div>
<div id="result2"></div>
</body>
</html>

Test it Now

Here both the conditions will be true.

jQuery hasClass() Example 4

<!DOCTYPE html>
<html>
 <head> 
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <script>
  $(document).ready(function() {   
   $(".btn").click(function(){ 
    var className = $(this).attr("id");
    $("ul li").each(function() {     
     if ($(this).hasClass(className)) {
      $(this).fadeTo('slow', 0.0).fadeTo('slow', 1.0);      
     }
    });    
   }); 
  });
  </script>   
  <style>
  ul{
   font-family: monospace;
   font-size: 15px;
   font-family: monospace; 
   font-style: normal;
   font-size-adjust: none;
   width:200px;   
   padding:0px; 
  }
   
  ul li{
   background-color:#7fffd4;
   width:100px;
   margin:5px;
   padding:5px;
   list-style-type:none;
   width:200px;
  }
  </style>
 </head>
 <body>
 <h1>jQuery .hasClass() function Example</h1>   
 <ul>
  <li class="red">Red</li>  
  <li class="green">Green</li>     
  <li class="green red">Green Red</li>
  <li class="blue">Blue</li>
 </ul> 
 <input type="button" class="btn" value="Red Class" id="red">
 <input type="button" class="btn" value="Green Class" id="green">
 <input type="button" class="btn" value="Blue Class" id="blue">
 <input type="button" class="btn" value="No Matching Class" id="noclass"> 
 </body>
</html>

Test it Now

Next TopicjQuery toggleClass()

← prev next →

Hot Tutorials

Contact US

Email:[email protected]

jQuery Tutorial

jQuery Effects

jQuery HTML/CSS

jQuery Form

jQuery Events

jQuery Misc

jQuery Questions

Miscellaneous

jQuery MCQ

jQuery UI

Interview Questions

jQuery hasClass()

Parameters of jQuery hasClass() method

Example of jQuery hasClass() method

jQuery hasClass() method example 2

Here the first condition is true and the second is false. If we set the second paragraph class name ?blue? then both the conditions will be true.

jQuery hasClass() Example 3

jQuery hasClass() Example 4

Hot Tutorials

Contact US