Using WebSockets with Deno

WebSockets is a communications protocol designed for bidirectional, persistent communication, offering a real-time alternative to HTTP polling, which is limited by its unidirectional nature and server resource demands. WebSockets are ideal for applications requiring immediate updates, such as chat applications or stock market bots, as they enable the server to push data directly to clients without constant requests. The protocol uses HTTP to establish connections, which are then upgraded to WebSocket connections via specific URI schemes like ws:// or wss://. The text provides a tutorial using Deno to create a WebSocket server and client, demonstrating bidirectional messaging, message broadcasting to multiple clients, and the importance of identifying connections. Through practical code examples, it shows how to leverage WebSockets for efficient real-time data transmission, emphasizing their utility in scenarios with frequently changing data, while noting that less dynamic applications might benefit more from simple HTTP polling.