Dynamic Product Image Pop Up

[takeoverapparel]

Hey im trying to create a pop up for my website basically when the little plus icon is clicked it shows a pop up with the product image so people can add to cart quicker. So far for this pop up I have the plus icon working, etc and I coded it by using the base,theme, and custom.js. How would I add dynamic images to my popup (product that is clicked goes to that specific product page). I want it similar to this website https://www.galleriagroupies.com/