File's in node server

How to read file in NodeJS ?

to access file in NodeJS we need file System module (fs) example: require(‘fs’)

const http = require('http');
const fs   = require("fs");


http.createServer(function (req, res, next) {
  fs.readFile('index.html',(err, data) => {
    res.write(data);
    return res.end();
  })
}).listen('8080')