The getCart helper method in cart-helper.js retrieves and returns the cart details from localStorage.
mern-marketplace/client/cart/cart-helper.js:
getCart() { if (typeof window !== "undefined") { if (localStorage.getItem('cart')) { return JSON.parse(localStorage.getItem('cart')) } } return []}
In the CartItems component, we will retrieve the cart items using the getCart helper method in componentDidMount and set it to state.
mern-marketplace/client/cart/CartItems.js:
componentDidMount = () => { this.setState({cartItems: cart.getCart()})}
Then the cartItems array retrieved from localStorage is iterated over using the map function to render the details of each item.
mern-marketplace/client/cart/CartItems.js:
<span key={i}> ...
