我有一个购物车,需要在此函数上添加有条件的折扣,该函数当前可获取某件商品的价格并将其乘以数量。当前,该功能就像没有折扣的护身符一样工作,但是折扣需要能够判断是否有两个或多个带有相同“标签”的商品(例如“奶酪比萨”,“蘑菇比萨”,“夏威夷比萨”)然后从返回的总数中减去一定金额即可使用。我该如何实现?
此功能获取用户购物车中所有商品的总价格
get totalAmount() {
let total = 0;
this.cart.forEach(item => (total += this.getItemTotal(item)));
///// possible conditional statement here
////// something like if (item.tags == "cheese"){
/////// return total - 2; }
//////// ( currently just errors out to "**item not found**" even though I thought
///// since the parameter "item" was in the function within the function it could recognize it)
return total;
}
此功能在以上功能内。它用于获取单个项目的小计,包括其选项
getItemTotal(item) {
let total = item.price * item.quantity;
item.options.forEach(option => (total += option.value * item.quantity));
return total;
}
下面是带有奶酪“标签”的商品的示例。条件块需要确定是否有两个标签与奶酪相似,然后在第一个函数中从总数中减去$ 2
"item": [
{
"id": 1,
"guid": "1d4aa3b2-c059-4fa7-a751-9bca735e4ea1",
"thumb": "https://foodorderingapp9309.s3-us-west-
1.amazonaws.com/CheesySenstions/menu/CheesePizza.JPG",
"title": "Cheese",
"body": "try new cheese pizza",
"tags": ["pizza"],
}
]
您可以访问forEach
loop回调内部的项目。
您可以使用counter来计数带有特定标签的项目数。这是一个例子:
get totalAmount() {
let total = 0;
let numberOfItemsWithCheeseTag = 0;
this.cart.forEach(item => {
total += this.getItemTotal(item);
// Increment the counter if 'cheese' is one of the tags
if (item.tags.includes('cheese')) {
numberOfItemsWithCheeseTag += 1; //
}
});
// Apply the discount if the counter reached a threshold
if (numberOfItemsWithCheeseTag >= 2) {
total -= 2;
}
return total;
}