Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
<!DOCTYPE html>↩
<html>↩
<head>↩
↩
<script type="text/javascript">↩
↩
function boom()↩
{↩
document.documentElement.style.columnCount = '3';↩
document.documentElement.offsetHeight;↩
document.documentElement.style.columnCount = '';↩
}↩
↩
</script>↩
↩
<style type="text/css">↩
↩
html:before { content: '0'; }↩
↩
</style>↩
↩
</head>↩
↩
<frameset onload="boom();"></frameset>↩
↩
</html>↩