getCartFromLocalStorage -- React

gistfile1.txt

    const LocalStorageCartKey = "CartList";
    const getCartFromLocalStorage = () => {
        try {
            let items = JSON.parse(localStorage.getItem(LocalStorageCartKey));
            if (items === null || items === undefined)
            {
                return [];
            }
            return items;
        } catch (e) {
            console.warn("Parse Error, in getCartFromLocalStorage, ", e);
            return [];
        }
    };
    const [ cartItems, setCartItems ] = useState(getCartFromLocalStorage());
    const cartSubject = new Subject([]);
    cartSubject.subscribe(newCart => {
        setCartItems(newCart);
        localStorage.setItem(LocalStorageCartKey, JSON.stringify(newCart));
        console.log(newCart);
    });