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Closest ancestor element that has a specific class in JavaScript

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The task is to find the closest ancestor of the element of specific class with the help of pure Javascript. There are two approaches that are discussed below.


Approach 1:  Use the Javascript selector to select the element. Use closest() method to get the closest parent with specific class. 
 

Example: This example implements the above approach. 

html

<!DOCTYPE HTML> 
<html
    <head>
        <title>
            Find closest ancestor element that has a
            specific class using pure JavaScript
        </title>       
    </head>
    <body style = "text-align:center;"
        <h1 style = "color:green;"
            GeeksforGeeks 
        </h1>
        <p id = "GFG_UP">
        </p>
 
        <div name = "parentDIV" class="parent">
          <div class="child">
          </div>
        </div>
        <button onclick = "myGFG()">
        click here
        </button>
        <p id = "GFG_DOWN">
        </p>
 
        <script>    
            var up = document.getElementById("GFG_UP");
            up.innerHTML = "Click on button to see result";
            var down = document.getElementById("GFG_DOWN");
            function myGFG() { 
                var el = document.querySelector("div")
                .closest(".parent")
                down.innerHTML = "Element of name '"
                  + el.getAttribute("name")
                  + "' is the parent element of specific class.";
            }
        </script>
    </body
</html>

                    

Output: 


Approach 2 : Keep moving to the parents of the element until find the specific class. Use the element.className.indexof() method to select the element of particular class. 
 

Example: This example implements the above approach. 

html

<!DOCTYPE HTML> 
<html
    <head>
        <title>
            Find closest ancestor element that has a
            specific class using pure JavaScript
        </title>       
    </head>
    <body style = "text-align:center;"
        <h1 style = "color:green;"
            GeeksforGeeks 
        </h1>
        <p id = "GFG_UP">
        </p>
 
        <div name = "parentDIV" class="parent">
          <div class="child">
          </div>
        </div>
        <button onclick = "myGFG()">
        click here
        </button>
        <p id = "GFG_DOWN">
        </p>
 
        <script>    
            var up = document.getElementById("GFG_UP");
            up.innerHTML = "Click on button to see result";
            var down = document.getElementById("GFG_DOWN");
            function findParent(el, class) {
                while ((el = el.parentNode) &&
                       el.className.indexOf(class) < 0);
                return el;
            }
            function myGFG() { 
                var el = document.querySelector(".child");
                var el = findParent(el, 'parent');
                down.innerHTML = "Element of name '"
                  + el.getAttribute("name")
                  + "' is the parent element of specific class.";
            }
        </script>
    </body
</html>

                    

Output: 
 



Last Updated : 03 Mar, 2023
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