<!DOCTYPE html><html lang="en"><head><title>Server-sent event testing thingy</title><style type="text/css">* { padding: 0; margin: 0; border: 0; }html, body, #body { width: 100%; height: 100%; }</style><script type="text/javascript">onload = function () { var dest = document.querySelector("div"); var source = new EventSource('/lab/perl/sse.pl'); source.onmessage = e => dest.innerHTML = e.data;}</script></head><body><div id="body"></div></body></html>