<!doctype html> <html> <head> <title>Long load</title> <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="simple.css"/> <style type="text/css"> body { background: white; } div { font-size: 4em; } div > span { text-decoration: underline; } </style> </head> <body> Time passes: <script type="application/javascript;version=1.8"> "use strict"; for (let i = 0; i < 5000; i++) { document.write("<br>..."); } </script> </body> </html>