【websocket】socket.io 例子：chat服务

• 基于socket.io快速实现一个实时通讯应用 看起来是一篇超牛的文章。

Socket.IO Chat

A simple chat demo for Socket.IO

How to use

$ npm i
$ npm start

And point your browser to http://localhost:3000. Optionally, specify
a port by supplying the PORT env variable.

Features

• Multiple users can join a chat room by each entering a unique username
  on website load.
• Users can type chat messages to the chat room.
• A notification is sent to all users when a user joins or leaves
  the chatroom.