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Test Info:
<!DOCTYPE HTML>
<html class="reftest-wait">
<head>
<style>
fieldset {
background:pink;
overflow:hidden;
height:100px;
}
legend::after { content:"legend"; }
p {
background:lime;
height:20px;
}
</style>
</head>
<body>
<fieldset id="f1"><p></p></fieldset>
<br>
<fieldset id="f2"><p></p></fieldset>
<br>
<fieldset id="f3"></fieldset>
<script>
function doTest() {
f1.appendChild(document.createElement('legend'));
f2.insertBefore(document.createElement('legend'), f2.firstChild);
f3.appendChild(document.createElement('legend'));
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>