how can I use two routes files using express?

Question

//index.js, I want to use all the routes in here.

const express = require("express");
const app = express();
const dotenv = require("dotenv");
const cors = require("cors");

dotenv.config();
app.use(cors());

//importing database conn
const conn = require("./db/conn");
conn();
//import routes

const authRoute = require("./routes/auth");

const productRoute = require("./routes/product");

//middleware
app.use(express.json());

//route middleware
app.use("/api/user", authRoute);

 app.use("/user/products", productRoute);

const port = process.env.PORT;

app.listen(port, () => console.log(`gg server is runnig ${port}`));

When i add only authRoute it is working perfectly fine and but when i try to add another route from another file it throws errror saying router.use requires middleware function but got a + gettype(fn)

//products.js

const router = require("express").Router();
const { productValidation } = require("express").Router();

router.post("./product", (req, res) => {
  const { error } = productValidation(req.body);
})

Answer 1

You need to return the router from product.js:

const router = require("express").Router();
const { productValidation } = require("express").Router();

router.post("./product", (req, res) => {
  const { error } = productValidation(req.body);
})
module.exports = router