How to check an element contains a class using jQuery?

Last Updated : 23 Apr, 2019

Method 1: Using hasClass() method: The hasClass() is an inbuilt method in jQuery which check whether the elements with the specified class name exists or not. It returns a boolean value specifying whether the class exists in the element or not. This can be used to check for multiple classes.

Syntax:

$('element').hasClass('className')

Example:

<!DOCTYPE html> 
<html> 
      
<head> 
    <title> 
        How to check an element contains 
        a class using jQuery? 
    </title> 
      
    <script src= 
        "https://code.jquery.com/jquery-3.3.1.min.js"> 
    </script> 
</head> 
  
<body> 
    <h1 style="color: green"> 
        GeeksforGeeks 
    </h1> 
      
    <b> 
        How to check an element contains 
        a class using jQuery? 
    </b> 
  
    <p class="example-class"> 
        This element has "example-class". 
    </p> 
  
    <p>Does the element have class? 
        <span class="output"></span> 
    </p> 
  
    <button onclick="checkForClass()"> 
        Click to check 
    </button> 
      
    <!-- Script to use hasClass() method to 
        check the existence of class name -->
    <script type="text/javascript"> 
        function checkForClass() { 
            classCheck = $('p').is('.example-class'); 
            document.querySelector('.output').textContent 
                    = classCheck; 
        } 
    </script> 
</body> 
  
</html>                     

Output:
check-class-hasClass

Method 2: Using is() method: This is similar to the above method and can be used to check more attributes if needed. The required element is selected and the class name is passed on like a CSS class selector. It returns a boolean value specifying whether the class exists in the element or not. This can be used to check for multiple classes.

Syntax:

$('element').is('.className')

Example:

<!DOCTYPE html> 
<html> 
      
<head> 
    <title> 
        How to check an element contains 
        a class using jQuery? 
    </title> 
      
    <script src= 
        "https://code.jquery.com/jquery-3.3.1.min.js"> 
    </script> 
</head> 
  
<body> 
    <h1 style="color: green"> 
        GeeksforGeeks 
    </h1> 
      
    <b> 
        How to check an element contains 
        a class using jQuery? 
    </b> 
  
    <p class="example-class"> 
        This element has "example-class". 
    </p> 
  
    <p>Does the element have class?  
        <span class="output"></span> 
    </p> 
  
    <button onclick="checkForClass()"> 
        Click to check 
    </button> 
      
    <!-- Script to use is() method to 
        check the existence of class name -->
    <script type="text/javascript"> 
        function checkForClass() { 
            classCheck = $('p').is('.example-class'); 
            document.querySelector('.output').textContent 
                    = classCheck; 
        } 
    </script> 
</body> 
  
</html>                     

Output:
check-class-is

How to check an element has certain CSS style using jQuery ?

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