SERVER SIDE CODE (NODE JS)
Step 1:
In your express application, add socket.io via installing socket.ionpm install socket.ioStep 2:
Now add this dependency in your app. js file.var express = require('express');
var app = express();
// Socket connection
/* Creates new HTTP server for socket */
var socketServer = require('http').createServer(app);
var io = require('socket.io')(socketServer);
/* Listen for socket connection on port 3002 */
socketServer.listen(3002, function(){
console.log('Socket server listening on : 3002');
});
/* This event will emit when client connects to the socket server */
io.on('connection', function(socket){
console.log('Socket connection established');
});
/* Create HTTP server for node application */
var server = http.createServer(app);
/* Node application will be running on 3000 port */
server.listen(3000);CLIENT SIDE CODE
Step 1:
In your chrome extension add socket.io.js in your index.html you can find it on:https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.3/socket.io.jsStep 2:
Now add the following script in your js file where you want to establish your connection./* Connects to the socket server */
var socket = io.connect('http://localhost:3002');
socket.on('connect', function() {
console.log('Client connected');
});
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