This works because if Bun finds a default export object with a fetch method, it assumes it’s a server. It wraps this in the Bun.serve API. You can see a simple use of this API in Listing 4.

How does an application server's Web container work? Let’s look at a typical Web-based interaction with our application server at runtime. Let’s use a typical scenario where the request is coming in ...

JavaScript creates an XMLHttpRequest object. This object sends a request to the corresponding web server. The server processes the request and sends a response back to the browser. JavaScript reads ...