A JavaScript implementation of gRPC for browser clients. For more information, including a quick start, see the gRPC-web documentation. gRPC-web clients connect to gRPC services via a special proxy; ...

This proposal is complete and already merged into ECMA262 specification. See the specification text here. Thanks for help and feedback on this effort from Brendan Eich, Waldemar Horwat, Jaro Sevcik, ...