This is a simple add to cart button designed by Jack Oliver. When you click on the cart image button, you get a modal window coming up which will tell you that the item has added to the cart. This has got a material design look to it.
If you are having trouble with the pen, try the archived copy on GitHub
See the Pen
React DailyUI – 016 – Overlay / Popup by Jack Oliver (@studiojvla)
on CodePen.