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How to check two elements are same using jQuery/JavaScript ?

  • Difficulty Level : Basic
  • Last Updated : 16 Oct, 2019

Given an HTML document containing two elements and the task is to check whether both elements are same or not with the help of JavaScript.

Approach 1: Use is() method to check both selected elements are same or not. It takes an element as argument and check if it is equal to the other element.

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Example: This example implements the above approach.




<!DOCTYPE HTML>  
<html>  
  
<head
    <title
       How to check two elements are same
       using jQuery/JavaScript?
    </title>
      
    <script src=
    </script>
</head>
  
<body style = "text-align:center;">  
      
    <h1 style="color:green;">  
        GeeksForGeeks  
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style =
        "color:green; font-size: 20px; font-weight: bold;">
    </p>
      
    <script
        var up = document.getElementById('GFG_UP');
        var down = document.getElementById('GFG_DOWN');
        var id1 = "GFG_UP";
        var id2 = "GFG_UP";
          
        up.innerHTML = "Click on the button to check if "
                + "both elements are equal.<br>" + "id1 = "
                + id1 + "<br>id2 = " + id2;
          
        function GFG_Fun() {
            if ($('#GFG_UP').is($('#GFG_UP'))) {
                down.innerHTML = "Both elements are same";
            } else {    
                down.innerHTML = "Both elements are different";
            }
        }
    </script
</body>  
  
</html>

Output:



  • Before clicking on the button:
  • After clicking on the button:

Approach 2: The == operator is used to compare two JavaScript elements. If both elements are equal then it returns True otherwise returns False.

Example: This example implaments the above approach.




<!DOCTYPE HTML>  
<html>  
  
<head
    <title
        How to check two elements are same
        using jQuery/JavaScript ?
    </title>
      
    <script src=
    </script>
</head>
  
<body style = "text-align:center;">
      
    <h1 style="color:green;">  
        GeeksForGeeks  
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style =
        "color:green; font-size: 20px; font-weight: bold;">
    </p>
      
    <script
        var up = document.getElementById('GFG_UP');
        var down = document.getElementById('GFG_DOWN');
        var id1 = "GFG_UP";
        var id2 = "GFG_DOWN";
          
        up.innerHTML = "Click on the button to check if both"
                + " elements are equal.<br>" + "id1 = "
                + id1 + "<br>id2 = " + id2;
          
        function GFG_Fun() {
            if ($('#GFG_UP')[0] == $('#GFG_DOWN')[0]) {
                down.innerHTML = "Both elements are same";
            } else {    
                down.innerHTML = "Both elements are different";
            }
        }
    </script
</body>  
  
</html>

Output:

  • Before clicking on the button:
  • After clicking on the button:



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