webpack.dev.conf.js

// 模拟数据
const appData = require("../data.json")
const seller = appData.seller
const goods = appData.goods
const ratings = appData.ratings

在devServer添加一个before函数并设置接口 

devServer: {
    // ...
     ,
    // 添加如下代码
    before(app){
      app.get('/api/seller', function (req, res) {
        res.json({
          errno: 0,
          data: seller
        })
      })
      app.get('/api/goods', function (req, res) {
        res.json({
          errno: 0,
          data: goods
        })
      })
      app.get('/api/ratings', function (req, res) {
        res.json({
          errno: 0,
          data: ratings
        })
      })
    }
  }

• https://blog.csdn.net/soxiuzi/article/details/79273983
• https://blog.csdn.net/sinat_39626276/article/details/79506697