<!DOCTYPE html>
<html>
<head>
<title>This tests that AX can manage text content changes while inside tree mutation.</title>
<style>
#foobar {
    text-transform: lowercase;
}

#foobar::first-letter {
	margin: 1px;
}
</style>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
    if (window.accessibilityController)
        accessibilityController.accessibleElementById("foobar");
</script>
</head>
<body>
<div id=foobar>Pass if no crash or assert.</div><span aria-labeledby=foobar id=newParent></span><script>
    newParent.appendChild(foobar);
</script>
</body>
</html>