call socket.io index.js code example
Example: socket.io documentation
const socket = new WebSocket('ws://localhost:3000');socket.onopen(() => { socket.send('Hello!');});socket.onmessage(data => { console.log(data);});const socket = new WebSocket('ws://localhost:3000');socket.onopen(() => { socket.send('Hello!');});socket.onmessage(data => { console.log(data);});