Html css javascript: how to make button add item to list

Question

I want to make Amazon like webpage. Click on product, click on buy now then it redirects to checkout page where all the items added to cart are visible, and in total checkout price should be shown. On clicking the checkout button the total of all item's price + tax should be shown

Answer 1

https://codepen.io/chrisachinga/pen/MWwrZLJ
Hi, ARYAN Khuman . Try to modify this code.