无法读取未定义的属性（读取“使用”）如何在 ExpressJS 中解决此问题？

Question

The warning in the terminal is based on undefined (reading 'use')-introduced route in my app is app>router>routers.js

const express = require("express");
const app = express();
const router = require("express").Router();
const { authRouters } = require("./Auth");
const { projectRouters } = require("./Project");
const { teamRouters } = require("./Team");
const { userRouters } = require("./User");
router.use("/project", projectRouters);
router.use("/team", teamRouters);
router.use("/user", userRouters);
router.use("/Auth", authRouters);
module.exports = { AllRouters: router };

Team.js (similarly for Project.js, Auth.js, User.js)

const router = require("express").Router();


> my codes...


module.exports = { projectRouters: router };

and finally in my Server.js

createRoutes() {
this.#app.get("/", (req, res, next) => {
  return res.json({ message: "Welcome to my app" });
});
this.#app.use((error, req, res, next) => {
  try {
    this.#app.use(AllRouters);
  } catch (error) {
    next(error);
  }
});

}

Answer 1

To whom may face a similar warning: the root of the problem is a matter of not defining " AllRouters" method in the contractor of the Server.js and the solution is:

module.exports = class Application {
  #app = express();
  #PORT;
  #DB_URL;
  #AllRouters;
  constructor(PORT, DB_URL, AllRouters) {
    this.#PORT = PORT;
    this.#DB_URL = DB_URL;
    this.#AllRouters = AllRouters;
    this.ConfigApplication();
    this.ConnectToMongoDb();
    this.CreateServer();
    this.CreateRoutes();
    this.ErrorHandler();
  }