We are not going to cover shallow or deep comparison here. Maybe in the future tutorial, I will put up a video or article on how to do so.
In the following example, we have one global object. We simply want to verify if the reference of this object is present in the array or not. After verification, we will display a Boolean value on the screen. Please have a look over the code example and steps given below.
HTML & CSS
We have 3 elements in the HTML file (div, button, and h1). The div element is just a wrapper for the rest of the elements.
The inner text for the button element is “Check” and for the h1 element is “Result”.
We have done some basic styling using CSS and added the link to our style.css stylesheet inside the head element.