We want to build a Javascript/HTML gui for our gRPC-microservices. Since gRPC is not supported on the browser side, we thought of using web-sockets to connect to a node.js serve
The grpc people at https://github.com/grpc/ are currently building a js implementation.
The repro is at https://github.com/grpc/grpc-web (gives 404 ->) which is currently (2016-12-20) in early access so you need to request access.