For years, the web operated on a simple principle: Browser asks. Server answers. Connection closes. This model worked perfectly when websites were mostly documents. A user opened a page. The browser requested data. The server responded. Everyo...

Most developers use Request-Response every day. Few stop to think about what actually happens after clicking a button. You open an app. You tap "Login". A response appears almost instantly. Simple, right? Not exactly. Behind that seemingly sim...