js cookie实现购物车

// 添加商品到购物车
function addToCart(productId, productName, price) {
    let cart = getCart();
    let item = { productId, productName, price, quantity: 1 };

    if (cart[productId]) {
        cart[productId].quantity += 1;
    } else {
        cart[productId] = item;
    }

    setCart(cart);
}

// 获取购物车内容
function getCart() {
    let cart = document.cookie.split(';').reduce((acc, cookie) => {
        let [key, value] = cookie.trim().split('=');
        acc[key] = JSON.parse(value);
        return acc;
    }, {});

    return cart['cart'] || {};
}

// 设置购物车内容
function setCart(cart) {
    document.cookie = `cart=${JSON.stringify(cart)}; path=/; max-age=3600`; // 设置过期时间为1小时
}

// 示例使用
addToCart('123', 'Laptop', 999.99);
console.log(getCart());

document.cookie = `cart=${JSON.stringify(cart)}; path=/; max-age=3600; Secure; SameSite=Strict`;