Finding First Matching Element in DOM

HTML Webpages are represented as a DOM tree. But how do we find elements inside this tree?
One of the requirements could be to find the first element matching the search criteria.
This criterion is provided as a selector. The selector must be a valid CSS selector group represented as a DOMString.

In this video, you will learn how to find the first matching element inside DOM using method on the document object
**********Watch all JavaScript Tutorials**********

***************************************************