A hands-on tutorial for building the browser-side client of a WebSocket-based chat application in JavaScript. Covers creating a WebSocket connection, handling open/close/error/message events, building a simple chat UI with HTML/CSS, sending and receiving JSON messages, DOM manipulation for dynamic output, and sanitizing user input to prevent XSS attacks. Also discusses shortcomings like lack of authentication and impersonation risks.
Table of contents
The Client SideThe User InterfaceVery Basic WebSocket SkeletononSocketError and onSocketClose implementationsonSocketOpen ImplementationonSocketMessage implementationFinally, the Keyboard InputShortcomings and Room for ImprovementUp NextLinksLicenseSort: