From the course: Master Next.js by Building Scalable Apps with Routing, Databases, and Performance

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Implement cart functionalities

Implement cart functionalities - Next.js Tutorial

From the course: Master Next.js by Building Scalable Apps with Routing, Databases, and Performance

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Implement cart functionalities

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Now, we will implement adding and removing functionality from the cart. For that, I will create a state to handle cart items. So, I will write const cartItems comma setCartItems and will say use state, giving the blank array as the initial state. Now, let me create a function to add the product to the cart. So, I will say const addProductToCart will receive new product and set the product to the state by saying set cart items, previous products, here I will say the spread operator, previous products, comma, new product. I will also create a function to remove products from the cart using the product id. So, I will say const removeProductFromCart will receive product id and update the state using setCartItems, previousProducts, previousProducts.filter will receive the product and we will return the rest of the products. Now I will pass all of these as a value to the provider by writing value cart items comma add product to cart, remove product from cart and set cart items. I'll also…

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