<!DOCTYPE html> <html> <head> <script type="text/javascript"> var sock = null; window.onload = function() { sock = new WebSocket("ws://127.0.0.1:9000"); sock.onopen = function() { console.log("Connected!"); } sock.onmessage = function(e) { console.log("Message received: " + e.data); } sock.onclose = function(e) { console.log("Connection closed."); } }; function send() { sock.send("Hello, world!"); console.log("Message sent .."); }; </script> </head> <body> <button onclick='send();'>Send Message</button> </body> </html>