我很困惑如何让购物车能够使用node.js在后端与服务器交互。这是我到目前为止使用JS得到的。我将其作为本地存储,但我不知道如何使用node.js将其发送到实际服务器。
let productsInCart = JSON.parse(localStorage.getItem('ShoppingCart'));
if(!productsInCart){
productsInCart = [];
}
const parentElement = document.querySelector('#buyItems');
const cartSumPrice = document.querySelector ('#sum-prices');
const products = document.querySelectorAll ('.product-under');
const countTheSumPrice = function(){
let sumPrice = 0;
productsInCart.forEach(product => {
sumPrice += product.price;
});
return sumPrice;
}
const updateShoppingCartHTML = function(){
localStorage.setItem('ShoppingCart',JSON.stringify(productsInCart));
if (productsInCart.length > 0){
let result = productsInCart.map(product => {
return 'fill in the blank'
});
parentElement.innerHTML = result.join('')
document.querySelector('.checkout').classList.remove('hidden');
cartSumPrice.innerHTML = "$" + countTheSumPrice();
}
else{
document.querySelector('.checkout').classList.add('hidden');
parentElement.innerHTML = '<h4 class="empty">Your shopping cart is empty</h4>';
cartSumPrice.innerHTML = "";
}
}
function updateProdcutsInCart(product){
for(let i=0; i < productsInCart.length; i++){
if(productsInCart[i].id == product.id){
productsInCart[i].count += 1;
productsInCart[i].price = productsInCart[i].basePrice * productsInCart[i].count;
return;
}
}
productsInCart.push(product);
}
products.forEach(product => {
product.addEventListener('click', (e) =>{
if (e.target.classList.contains('addToCart')){
const productID = e.target.dataset.prodcutID;
const productName = product.querySelector('.productName').innerHTML;
const productPrice = product.querySelector('.priceValue').innerHTML;
const productImage = product.querySelector ('img').src;
let productToCart = {
name: productName,
image: productImage,
id: prodcutID,
count: 1,
price: +productPrice,
basePrice : +productPrice
}
updateProdcutsInCart(productToCart);
updateShoppingCartHTML();
}
});
});
parentElement.addEventListener('click', (e) =>{
const isPlusButton = e.target.classList.contains('button-plus');
const isMinusButton = e.target.classList.contains('button-minus');
if (isPlusButton || isMinusButton){
for(let i=0; i < productsInCart.length; i++){
if (productsInCart[i].id === e.target.dataset.id){
if(isPlusButton){
productsInCart[i].count += 1;
}
else if(isMinusButton){
productsInCart[i].count -= 1;
}
productsInCart[i].price = productsInCart[i].basePrice * productsInCart[i].count;
}
if(productsInCart[i].count <=0){
productsInCart.splice(i,1);
}
}
updateShoppingCartHTML();
}
});
updateShoppingCartHTML()
字符串
我试着在网上找到一个解决方案,但在这个过程中迷路了。
1条答案
按热度按时间nwwlzxa71#
你需要一个像expressJS这样的nodeJS后端框架。虽然它可以在纯node中完成,但最好使用express,因为它让你的生活变得更容易。你可以使用http方法从/向服务器接收或发送数据。