1 <!doctype html> 2 <html> 3 <head> 4 <title>Connect to a WebSocket server</title> 5 <script type="text/javascript"> 6 var protocol = location.protocol.replace('http', 'ws'); 7 var url = protocol + '//' + location.host + '/count-connection'; 8 var ws = new WebSocket(url); 9 10 ws.onopen = function() { 11 document.title = 'CONNECTED'; 12 }; 13 14 ws.onclose = function() { 15 document.title = 'CLOSED'; 16 }; 17 </script> 18 </head> 19 </html> 20