gob fetcher for wasm example

go/wasmdevserver/devserver.go

@@ -40,6 +40,7 @@ type Config struct {
 	Build     func() ([]byte, error)                    // (re)build the wasm bundle; combined output on failure
 	Render    func(path string) (inner string, ok bool) // SSR the #app inner HTML for a route (ok=false => client-rendered)
 	Document  func(inner string) string                 // wrap #app inner HTML in a full HTML document
+	Handle    func(mux *http.ServeMux)                  // optional: register extra routes (e.g. app API endpoints)
 }
 
 // Serve builds once (in watch mode), wires the routes, and blocks serving.
@@ -70,6 +71,9 @@ func Serve(cfg Config) error {
 	}
 
 	mux.HandleFunc("POST /rsc", rsc.Handler) // server components
+	if cfg.Handle != nil {
+		cfg.Handle(mux) // app-registered routes (API endpoints, etc.)
+	}
 	mux.HandleFunc("/", rootHandler(cfg))
 
 	log.Printf("serving %q on http://localhost%s", cfg.Dir, cfg.Addr)