text: import {
    ADD_COUNTER,
    ADD_TO_CART
  } from './mutation-types'
  
  export default {
    addCart(context,payload) {
      return new Promise(((resolve, reject) => {
        //1.查找之前数组中是否有该商品
        let oldProduct = context.state.cartList.find(item => item.iid === payload.iid)
        //2.判断oldProduct
        if(oldProduct){
          context.commit(ADD_COUNTER,oldProduct)
          resolve('当前的商品数量+1')
        }else {
          context.commit(ADD_TO_CART,payload)
          resolve('添加新的商品')
        }
      }))
    }
  }