Thanks Sebastien, it works with wslink==0.1.14. I have a question, I open 2 separate browsers (from 2 different clients), and access the same url: :1234. Then they show up the same content. It does mean that anything changing from one client will reflect on the other. So does the library “py-web-vue” supports each client has it own session ? So each time one client connects to the server, server will only process separately for that client ?