How to manage NodeJs app code to reduce clutter

Hie,

I am developing a Nodejs (Express) web app and pretty much new to this technology. So far I see that there can only be one point of entry mine being my the server.js file. Now it seems all requests and/or processes should be initiated here which is fine for a smaller application, but my site has about 25 page routes already all of who's request should be handle here. I also have a dozen or so Ajax requests are handled here. Now even though I am processing different functions e.g CRUD operations in separate files, I still fear at some point my code will become unreadable as the server.js file get longer

const express = require("express")
const path = require("path")
const exphbs = require("express-handlebars")

let app = express()

app.set("views",path.join(__dirname,'templates'))
app.engine('handlebars',exphbs({defaultLayout:'main'}))
app.set('view engine','handlebars')

app.set('port',(process.env.PORT || 3000));

app.get('/',(req,res)=>{
    res.render('home',{'title':'Home'});
});
app.get('/home',(req,res)=>{
    res.render('home',{'title':'Home'});
});
app.get('/register',(req,res)=>{
    res.render('register',{'title':'Register'});
});
app.use(express.static(path.join(__dirname, '/public')));

app.listen(app.get('port'),()=>{
    console.log(`Server started on port : ${app.get('port')}`)
})

So far my server.js is this small, but it just hit me that I have 25 pages and multiple Ajax processes on each.

Solution

Yes, you have to structure your routes. For that, you have to look at Express Router. You have to create different route files based on a specific resource.

/routes/homeRoutes.js

const express = require("express");
const router = express.Router();
router.get('/',(req,res)=>{
       res.render('home',{'title':'Home'});
});

module.exports = router;

server.js

const homeRoutes = require("./routes/homeRoutes");
app.use("/api/v1/home", homeRoutes);

Also, have a look at the following links for a better understanding of project structure and express router.