Function toggleCartItemQuantity

context/StateContext2.js:51–69

(id, value)

    }

    const toggleCartItemQuantity = (id, value) => {
        foundProduct = cartItems.find((item) => item._id === id)
        index = cartItems.findIndex((product) => product._id === id)
        const AddNewCartItems = cartItems.filter(item => item._id !== id);

        if(value === 'inc') {
            let newCartItems = [...AddNewCartItems, {...foundProduct, quantity: foundProduct.quantity + 1}]
            setCartItems(newCartItems);
            setTotalPrice(prevTotalPrice => prevTotalPrice + foundProduct.price)
            setTotalQty(prevTotalQty => prevTotalQty + 1)
        } else if(value === 'dec') {
            if(foundProduct.quantity > 1) {
                let newCartItems = [...AddNewCartItems, {...foundProduct, quantity: foundProduct.quantity - 1}]
                setCartItems(newCartItems);
                setTotalPrice(prevTotalPrice => prevTotalPrice - foundProduct.price)
                setTotalQty(prevTotalQty => prevTotalQty - 1)
            }
        }
    }

    const incQty = () => {
        setQty((prevQty) => prevQty + 1);