Socket.io + SSL + self-signed CA certificate gives error when connecting

Question

I am running an https server using a certificate which was created using a self-signed CA certificate.

Now I want to connect Socket.io client to the Socket.io server

Answer 1

four years later but for any finding this post like me if you need to force client socket to not reject a self-signed server cert you need rejectUnauthorized: false as in const socket = require('socket.io-client')('https://192.168.0.31', { transports: ['websocket'], rejectUnauthorized: false }) from https://github.com/socketio/engine.io-client#methods

also there is now a good source for free certs so now you don't even have to be "cheap d*ck" https://letsencrypt.org/