How to add class to an element without addClass() method in jQuery ?

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The task is to add a new class to the element without using addClass() method with the help of jQuery. There are two approaches that are discussed below:

Approach 1: To perform the operation, we can use toggleClass() method to toggle the class which we want to add to the element.

Example:

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        How to add class to an element without 
        addClass() method in jQuery ? 
    </title> 
  
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"> 
    </script> 
  
    <style> 
        #el { 
            background: green; 
        } 
  
        .newClass { 
            color: white; 
        } 
    </style> 
</head> 
  
<body style="text-align:center;"> 
  
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
  
    <p id="GFG_UP"></p> 
  
    <p id="el">This is the element</p> 
  
    <button onclick="GFG_Fun()"> 
        Click Here 
    </button> 
  
    <p id="GFG_DOWN"></p> 
  
    <script> 
        var el_up = document.getElementById('GFG_UP'); 
        var el_down = document.getElementById('GFG_DOWN'); 
  
        el_up.innerHTML = "Click on the button to " 
                    + "perform the operation."; 
                      
        function GFG_Fun() { 
            $('#el').toggleClass('newClass'); 
            el_down.innerHTML = "Class has been added"; 
        } 
    </script> 
</body> 
  
</html> 

Output:

Approach 2: We can also use attr() method and prop() method to add a new attribute ‘class’ to the element.

Example:

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        How to add class to an element without 
        addClass() method in jQuery ? 
    </title> 
  
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"> 
    </script> 
  
    <style> 
        #el { 
            background: green; 
        } 
  
        .newClass { 
            color: white; 
        } 
    </style> 
</head> 
  
<body style="text-align:center;"> 
  
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
      
    <p id="GFG_UP"></p> 
  
    <p id="el">This is the element</p> 
      
    <button onclick="GFG_Fun()"> 
        Click Here 
    </button> 
      
    <p id="GFG_DOWN"></p> 
  
    <script> 
        var el_up = document.getElementById('GFG_UP'); 
        var el_down = document.getElementById('GFG_DOWN'); 
  
        el_up.innerHTML = "Click on the button to " 
                        + "perform the operation."; 
                          
        function GFG_Fun() { 
            $('#el').attr('class', 'newClass'); 
            el_down.innerHTML = "Class has been added"; 
        } 
    </script> 
</body> 
  
</html> 

Output:

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