socket.io emit not working

I am using socket.io client and server(nodejs)

on connect I am using emit but it is not doing anything

my server code

const app = require("express")();
const server = require("http").createServer(app);
app.use(function (req, res, next) {

    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
    res.setHeader('Access-Control-Allow-Credentials', true);

    next();
});

const io = require("socket.io")(server, {
    cors: {
      origin: '*',
    }
  });

io.on("connection", (socket) => {
    console.log("Connected!");
    socket.emit('on connect testing');
    io.emit('on connect testing2');
});

var redis = require('redis');  
//var url = "redis://:@localhost:6379"; 
//var redis = require('redis-url').connect();
//var client = redis.createClient(url);  
var client = redis.createClient();  
//var client = redis.createClient();
client.on("error", function(error) {
  console.error(error);
});
client.subscribe('notification');
client.on('message', function(channel, msg) {  
  console.log("Message received: "+msg);
  io.sockets.emit(msg);
  console.log('emitted');
});



console.log('starting server on 8001...');
server.listen(8001);

my index.html

<script src="https://cdn.socket.io/3.1.3/socket.io.min.js" integrity="sha384-cPwlPLvBTa3sKAgddT6krw0cJat7egBga3DJepJyrLl4Q9/5WLra3rrnMcyTyOnh"
crossorigin="anonymous"></script>
<script>
    var socket;
    function createSocket(host) {
        return io(host, { transports : ['websocket'] }); 

        //if (window.WebSocket){
          //  console.log('1');
            //return new WebSocket(host);
        //} else if (window.MozWebSocket){
          //  console.log('2');
            //return new MozWebSocket(host);
        //}
    }
    function init() {
        var host = "ws://localhost:8001";
        try {
            socket = createSocket(host);
            console.log('3');
            socket.onconnect = function(msg) {
              console.log('In Connect with msg: '+msg);
            };
            socket.onopen = function(msg) {
              console.log('In Open with msg: '+msg);
            };
            send();
            socket.onmessage = function(msg) {
                  //var jsonmsg = JSON.parse(msg.data)
              console.log('In onmessage with msg: '+msg);
            };
            socket.onclose = function(msg) {
              console.log('In Close with msg: '+msg);
            };            
        }
        catch (ex) {
            console.log('4');
            console.log(ex);
        }
    }
    function quit() {
        console.log('5');
        socket.close();
    }
    function send() {
        console.log('7');
        socket.emit('some event');
    }
    setInterval(function(){
        if(!(socket.readyState == 1)){
          console.log('6');
          init();
        }
    }, 90000);
    init();
    
</script>

[doug-shontz]

I’ll see what I can do to carve it out. It’s residing in a number of different modules in NDA covered code. I’ll need to break it out into a separate repo.

[darrachequesne]

@gsudhanshu you have a working example here: https://github.com/socketio/socket.io-fiddle

Please also check the examples directory: https://github.com/socketio/socket.io/tree/master/examples