For example, you want to debug a website but it does not use jQuery and you are used to use jQuery. So don’t worry, just open the console window and paste this code then you will be able to debug the site using jQuery:
var script = document.createElement("script"); script.src = "https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"; document.body.appendChild(script);
If you are jQuery lover, this thing is very useful. For example, let’s say, you visit imdb website. That site is not using jQuery on its frontend. And you want to list all the movie titles on an imdb page. You can use jQuery to do so easily. In a simple word, you can manipulate whatever you see in your browser when you visit any site by adding jQuery yourself.