Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Socket IO Testing</title>
</head>
<body>

<div>
    <h3>Request</h3>
    <span id="socketId"></span>
</div>
<div>
    <h3>Response</h3>
    <span id="responseText"></span>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.4/socket.io.js"></script>
<script>
   var socket = io.connect("https://host_name_here");
    socket.on('ConnectionEstablished', function(data) {
        document.getElementById("socketId").innerText = JSON.stringify({socketId:socket.id,text:"Socket Connected successfully"});
        document.getElementById("responseText").innerText = "";
        console.log("Connection established successfully");
    });

    socket.io.on("connect_error",function (err) {
        console.log("Connection Error : " + err);
    });
</script>
</body>
</html>

const express = require("express");
const app = express();
const socket-io = require('socket.io');

app.use(express.static("index.html");
const server = app.listen(8000,function () {
   log.info(`express server run on port 8000`);
});
const io = socket-io.listen(server);
io.on("connection",function(){
  console.log("socket connection established ");
});