socket.io

socket.io is a JavaScript library for real-time web applications. It enables real-time, bi-directional communication between web clients and servers. It uses technologies like WebSockets to facilitate this communication under the Node.js environment.

Latest Ver 4.8.1

Homepage

Github

61,966

📢 socket.io is a JavaScript library supporting real-time communication between web clients and servers.

CDN Download

License: MIT

Asset Type :

View All Versions

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.esm.min.js

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.js

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.min.js

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.msgpack.min.js

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.esm.min.js.map

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.js.map

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.min.js.map

https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.8.1/socket.io.msgpack.min.js.map

Sample Code

⚠️ Some code, including import statements, may not run properly on jsFiddle. If it fails to execute, please copy the code and try it in your own environment.

📄 HTML
<div id='status'>Connecting...</div>

🧩 External JS
<script src="https://cdn.socket.io/4.0.0/socket.io.js"></script>

⚙️ JavaScript
var socket = io();
socket.on('connect', function() {
  document.getElementById('status').innerHTML = 'Connected!';
});

⚡ Top Tools for Developers