// import plugin
const MockjsWebpackPlugin = require("mockjs-webpack-plugin");

module.exports = {
  entry: "./index.js",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "my-first-webpack.bundle.js"
  },
  // config plugin
  plugins: [
    new MockjsWebpackPlugin({
      // mock data folder path
      path: path.join(__dirname, "./mock"),
      // mock server port, avoid collision with application port
      port: 3000
    })
  ],
  // config proxy
  devServer: {
    // application port
    port: 5001,
    proxy: {
      // mock server url
      "/": "http://localhost:3000/"
    }
  }
};

...
module.exports = {
  ...
  // config proxy
  devServer: {
    // application port
    port: 5001,
    proxy: {
      '/api': {
        target: 'http://localhost:3000/',
        pathRewrite: {
          // set url rewrite, for example, 
          // http://localhost:5001/api/getData -> http://localhost:3000/getData
          '^/api': ''
        }
      }
    }
  }
};

new MockjsWebpackPlugin(options);

/**
 * Json data file
 *
 * @url /json/data
 *
 * Here you can write a detailed description
 * of the parameters of the information.
 *
 * Parameter description and other instructions.
 * uid: user ID
 * name: username
 * email: the email
 * etc.
 */
{
  "code": 0,
  "result|5": [
    {
      "uid|+1": 1,
      "name": "@name",
      "email": "@email"
    }
  ]
}

/**
 * JS data file
 *
 * @url /js/js-data-file
 *
 * Export data by using the JS file directly.
 */

module.exports = {
    "code": function () { // simulation error code, 1/10 probability of error code 1.
        return Math.random() < 0.1 ? 1 : 0;
    },
    "list|5-10": [
        {"title": "@title", "link": "@url"}
    ]
};

/**
 * JS function file
 *
 * @url /js/js-func-file/user?uid=233
 *
 * GET: Request method and parameter
 *   uid This is the requested userID
 *
 * Here you can write a detailed description
 * of the parameters of the information.
 */
module.exports = function(req) {
  var uid = req.query.uid;

  if (!uid) {
    return {
      code: -1,
      msg: "no uid"
    };
  }

  return {
    code: 0,
    data: {
      uid: +uid,
      name: "@name",
      "age|20-30": 1,
      email: "@email",
      date: "@date"
    }
  };
};