另外發(fā)有一篇mockjs的，比這篇簡單椿访。

vue/cli 5.0.0
相關(guān)依賴：compression-webpack-plugin webpack-bundle-analyzer unplugin-auto-import unplugin-vue-components mock json5
vue.config.js

const { defineConfig } = require("@vue/cli-service");

const CompressionPlugin = require('compression-webpack-plugin')

const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

const AutoImport = require('unplugin-auto-import/webpack')

const Components = require('unplugin-vue-components/webpack')

const { ElementPlusResolver } = require('unplugin-vue-components/resolvers')

const prodGzipExtensions = ['js', 'css', 'png', 'jpg']

module.exports = defineConfig({
  transpileDependencies: true,
  productionSourceMap: false,
  lintOnSave: false,
  devServer: {
    // webpack5
    setupMiddlewares: require('./mock/index')
    // 其他版本的
    // onBeforeSetupMiddleware: require('./mock/index')
    // before:  require('./mock/index')
  },

  configureWebpack: (config) => {
    // 壓縮優(yōu)化
    const plugins = []
    plugins.push(
      new CompressionPlugin({
        algorithm: 'gzip',
        test: new RegExp("\\.(" + prodGzipExtensions.join('|') + ")$"),
        threshold: 1024 * 10,
        minRatio: 0.8
      }),
      // new BundleAnalyzerPlugin(),
      new webpack.optimize.LimitChunkCountPlugin({
        maxChunks: 5
      }),
      new webpack.optimize.MinChunkSizePlugin({
        minChunkSize: 5
      }),
      // 按需引入
      AutoImport({
        resolvers: [ElementPlusResolver()],
      }),
      Components({
        resolvers: [ElementPlusResolver()],
      })
    )

    config.plugins = [...config.plugins, ...plugins]

  }

});

環(huán)境變量 .env.development

MOCK = true

mock 文件夾

const fs = require('fs')
const path = require('path')
const Mock = require('mockjs')
const JSONS = require('json5')


function getData(filePath) {
    const json = fs.readFileSync(path.resolve(__dirname, filePath), 'utf-8')
    return JSONS.parse(json)
}
// 這里也會根據(jù)webpack版本不同而有所改變
module.exports = function (middlewares, devServe) {
    if (process.env.MOCK === 'true') {
        middlewares.unshift({
            path: "/user/userInfo",
            middleware: (req, res) => {
                console.log(111);
                // mock 數(shù)據(jù)模擬接口數(shù)據(jù), 這里可以換成js文件漓拾，不需要再讀取json文件那么麻煩
                // js文件就可以直接獲取對應(yīng)的變量名即可   
                let json = getData("./userInfo.json")
                res.json(Mock.mock(json));
            },
        })
    }
    return middlewares;

}
// 不同版本的
module.exports = function (devServer) {
  if (process.env.MOCK == "true") { 阁最、
    devServer.app.post("/user/userInfo", function (rep, res) {、
      var json = getJsonFile("./userInfo.json");
      res.json(Mock.mock(json));
    });
  }
};

userInfo.json

{
    "code": 200,
    "data": {
        "id": "1",
        "name": "lisi"
    }
}

接口使用

  axios.get("/user/userInfo").then((res) => {
    console.log(res);
  });