text: import {
      ADD_COUNTER,
      ADD_TO_CART
  
  
  } from './mutations-type'
  export default {
      addCart(context, payload) {
          return new Promise((resolve, reject) => {
              let oldProduct = null;
              for (let item of context.state.cartList) {
                  if (item.iid == payload.iid) {
                      oldProduct = item
                  }
              }
              if (oldProduct) {
                  context.commit(ADD_COUNTER, oldProduct)
                  resolve('商品的数量+1')
              } else {
                  context.commit(ADD_TO_CART, payload)
                  resolve('新增一个商品')
              }
          })
  
      }
  }