grpc-web indeed does use XMLHttpRequest internally to make the request to the server. Main advantage is type-safety of the overall communication protocol and s

grpc-web indeed does use XMLHttpRequest internally to make the request to the server. Main advantage is type-safety of the overall communication protocol and some efficiency gains. Cannot be stated strongly enough how important compile-time type-safety guarantees between client and server is (particularly in a "microservices" environment where everything is disconnected at runtime); eliminates an entire class of bugs, frees developers to focus on more business-relevant tasks rather than worrying about serialization.