ecommerce product page

I realized there are many ways to crerate lightbox like any other concept in programming. The fancy names are just for sounding complex but really simple. You know, like city folks and their dramatic fashion; appearance of sophistication but really, if you look/listen well, you'll hear a cry for help hahahaha. Anyways, I was gonna watch a video on lightbox but I decided you know let me break it down to what it really is.

I need to get more comfortable with my use of classList toggle. It can really help shorten my code lengths and save me time. Any idea?