mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 20:47:44 +00:00
26 lines
388 B
HTML
26 lines
388 B
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<script type="text/javascript">
|
|
|
|
function boom()
|
|
{
|
|
window.addEventListener("DOMSubtreeModified", function(){}, false);
|
|
|
|
var span = document.createElement("span");
|
|
document.body.appendChild(span);
|
|
}
|
|
|
|
</script>
|
|
|
|
<style type="text/css">
|
|
|
|
span:before { content: '0'; }
|
|
span:after { content: '1'; }
|
|
|
|
</style>
|
|
</head>
|
|
|
|
<body onload="boom();"></body>
|
|
</html>
|