How to pass id via websocket?

Question

JavaScript

How to pass user id with whom you communicate from client to server using websocket

Answer 1

Serialize the message data into a string something like json, simple, universal, convenient, using JSON.stringify and decode JSON.parse.
If the message is complex and contains a lot of data of different types, so that json grows several times, then you can use binary serializers, popular and beautifully implemented - google protobuf ( it was discussed here ) or just compress the channel