JavaScript: Check whether a specified value is a DOM element

Last update on July 18 2025 13:00:04 (UTC/GMT +8 hours)

JavaScript Object: Exercise-18 with Solution

Check DOM Element

Write a JavaScript function to check whether a given value is a DOM element.

Sample Solution:

HTML Code:


<html>
  <head>
  <meta charset="utf-8">
  <title>JavaScript function to check whether a specified value is a DOM element</title>

  <script
  src="https://code.jquery.com/jquery-3.3.1.min.js"
  integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
  crossorigin="anonymous"></script>

  </head>
  <body>
  </body>
  </html>

JavaScript Code:

function is_dom_element(obj) {
    return !!(obj && obj.nodeType === 1);
  }
console.log(is_dom_element(jQuery('body')[0]));

Output:

true

Flowchart:

Live Demo:

See the Pen javascript-object-exercise-18 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

Write a JavaScript function that checks if a given input is a DOM element by testing its nodeType property.
Write a JavaScript function that uses the instanceof operator to verify if the input is an instance of HTMLElement.
Write a JavaScript function that accepts a selector string and returns true if the corresponding element exists in the DOM.
Write a JavaScript function that validates a variable as a DOM node by checking if it has a tagName property.

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