Coding Cheatsheets - Learn to Code

A route is a mapping from a url to an object.It handles HTTP client requests. Basic Routing Hope you have install and have basic knowledge Express module. npm install express Note: Above command download the required express modules and install them. Here is our Server file. var express = require( 'express' ); var app = express(); //Creating Router() object var router = express.Router(); // Provide all routes here, this is for Home page. router.get("/",function(req,res){   res.json({"message" : "Hello World"}); }); app.use("/",router); // Listen to this Port app.listen(3000,function(){   console.log("Live at Port 3000"); }); Code Explanation: 1. In our first line of code, include the "express module." 2. Create object of the express module. 3. Creating a callback function. This function call when you hit url from browser http://localhost:3000 .It send the string 'Hello World' to ...

Here are simple steps to create real time notification using NodeJs, Socket.io and Mysql Socket.IO enables real-time bidirectional event-based communication.It has two parts: a client-side library that runs in the browser, and a server-side library for node.js. Install Socket.IO npm install --save socket.io I hope you have install express and mysql. This are basic few code inside server file. var express = require( 'express' ); var app = express(); app.use( express.static( __dirname + '/public') ); var mysql = require('mysql'); var server = require( 'http' ).Server( app ); var io = require( 'socket.io' )( server ); server.listen( 3000, function(){   console.log( 'listening on *:3000' ); } ); app.get('/', function(req, res) {    res.sendFile(__dirname + '/index.html'); }); The require('socket.io')(http) creates a new socket.io instance attached to the http server. Now make mysql conn...