How did this kind of syntax become so popular? I think express is the first to do the scheme of:

    app.handleGet("/route/goes/here", (req, res) => {

    });

Which seems like it's useful for making really quick and dirty micro-services (nano-services, even), but I still vastly prefer the more declarative and modular schemes of bootstrap or asp.net:

    // Middleware automatically routes "/Foo" to FooController
    [Controller]
    public class FooController : Controller
    {
        private IMyService _service { get; init; }
        
        // Declarative dependency injection
        FooController(IMyService service)
        {
            this._service = service;
        }

        // HTTP Method and Route are declarative
        [HttpGet("/")]
        public ActionResult GetBar([FromBody] Model myModel)
                                 // ^ automatic user input validation using reflection
        {
            this._service.create(myModel); // or whatever you need to do
            return Ok();
        }
    }

This has always seemed way more maintainable to me. Even microsoft has added the ability to do these quick and dirty HTTP routing methods along with top level statements.