node.js - socket.io 搭建了websocket，但是我用原生js却connect不上？

Answer 1

You should use the front-end library provided by socket.io to connect

Answer 2

1. First check whether your server is normal
2. There are multiple versions of websocket, and the verification method must be correct

I have written before, there are at least two versions, and finally a round robin is added. As a communication that does not support websocket, any mobile phone or computer browser can communicate directly