<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Wormhole test</title> <script> // Create WebSocket connection. const socket = new WebSocket('ws://localhost:8080/hello'); // Connection opened socket.addEventListener('open', function (event) { socket.send('Hello Server!'); }); socket.addEventListener('error', console.error) // Listen for messages socket.addEventListener('message', function (event) { console.log('Message from server ', event.data); }); </script> </head> <body> </body> </html>