Answers for "socket.io what is it"

socket..io

<script src="https://cdn.socket.io/socket.io-3.0.1.min.js"></script>

socket io

const server = require('http').createServer();
const io = require('socket.io')(server);
io.on('connection', client => {
  client.on('event', data => { /* … */ });
  client.on('disconnect', () => { /* … */ });
});
server.listen(3000);