How to read all routes dynamically in node.js - node.js

Question

I am trying to read all routes in my app.js file from './routes' folder,but
gettingerror:"TypeError: Cannot read property 'forEach' of undefined"
import express from "express";
import fs from "fs";
const app = express();
fs.readdir('./routes', (err, fs) => {
fs.forEach(file => {
app.use('/', require('./routes/' + file))
});
})
export default app

Answer 1

This worked for me:
sync
fs.readdirSync('/some/path/routes').forEach(function(file) {
app.use('/', require(`/some/path/routes/` + file));
});
async
fs.readdir('/some/path/routes', function(err, files){
files.forEach(function(file){
app.use('/', require(`/some/path/routes/` + file));
});
});

Answer 2

You can do using fs.readdirSync because the server is not yet started.
fs.readdir(`${__dirname}/routes`, (err, files) => {
if (err)
console.log(err);
else {
files.forEach(file => {
app.use('/', require(`${__dirname}/routes` + file));
})
}
})
You can use fspromise and import to handle using promise. 🚀🚀🚀
import { promises as fsPromises } from 'fs';
export const init = async () => {
const files = await fsPromises.readdir(`${__dirname}/routes`);
const router = Router();
const createRoute = async (file) => {
const route = await import(`./routes/${file}`);
router.use("/", route.default);
};
await Promise.all(files.map(createRoute));
return router;
}
// app.js
import {init} from "./routes";
const app = express();
(async() => {
await init();
// Start server
})();
I would suggest doing like below. You will have more control over routes. You can do customization on routes bases if needed.
ex. /v1 and /v2 etc..
// routes/index.js
import { Router } from "express";
import route1 from './route1';
import route2 from './route2';
const router = Router();
[route1, route2].forEach((route) => router.use("/", route));
export default router;
// app.js
import express from "express";
import routes from "./routes";
const app = express();
app.use("/", routes);
export default app;