feat: add web sockets

Author: ExploitEngineer

part9 (Advanced Topics)/22_webSockets.js

@@ -0,0 +1,17 @@
+/*
+INFO: WebSockets
+A WebSocket is a protocol enabling full-duplex, bi-directional,presistent communication over a single TCP connection. Unlike HTTP's request-response model, it keeps the connection open, letting both client and server send messages anytime.
+
+INFO: Key Points
+1. Begins with an HTTP Upgrade handshake using ws:// or wss://
+2. After upgrade, message frames carry data in both directions
+3. Ideal for real-time apps: chat, live dashboards, gaming, IoT
+*/
+
+// Usage
+const ws = new Socket("wss://example.com/socket");
+
+ws.onopen = () => { ws.send("Hello Server"); };
+ws.onmessage = e => console.log("From server:", e.data);
+ws.onclose = e => console.log("Connection closed");
+ws.onerror = err => console.error("Error:", err);