Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <body> <h1>Getting server updates</h1> <div id="result"></div> <script> if(typeof(EventSource)!=="undefined") { var source=new EventSource("demo_sse.php"); source.onmessage=function(event) { document.getElementById("result").innerHTML+=event.data + "<br>"; }; } else { document.getElementById("result").innerHTML="Sorry, your browser does not support server-sent events..."; } </script> </body> </html>
Result:
W3Schools.com - Try it yourself