微信小程序商城购物车计算总价逻辑怎么写呀？

Question

Page({
data: {
carts:[
{id:1,title:'新鲜芹菜',image:'/image/s5.png',num:4,price:1.8}
{id:2,title:'素米 ',image:'/image/s6.png',num:1,price:12 ]},

onShow() {
    
  },

})

Answer 1

用reduce,参考这个，取carts的值

        const carts = [{ id: 1, title: '新鲜芹菜', image: '/image/s5.png', num: 4, price: 1.8 },{ id: 2, title: '素米 ', image: '/image/s6.png', num: 1, price: 12}]
        let $total = 0
        $total = carts.reduce(function (total, currentValue, currentIndex, arr) {
            return currentValue['num'] ? total + currentValue['num'] * currentValue['price'] : total
        },0)
        console.log($total)