Design Shopping Cart
Medium Priority31 min readUpdated June 27, 2026
What is a Shopping Cart?
A shopping cart is a feature in online stores that lets customers collect items they want to buy before completing the purchase.
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It works like a physical cart in a supermarket. You add products as you browse, review them together, then proceed to checkout and pay.
In this chapter, we will explore the low-level design of shopping cart in detail.
Let's start by clarifying the requirements: