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Test Info:

<html>
<head>
<script>
try { o1 = document.createElement('textarea') } catch(e) { }
try { o2 = document.createElement('div') } catch(e) { }
try { o3 = document.createElement('map') } catch(e) { }
try { document.documentElement.appendChild(o2) } catch(e) { }
try { o2.appendChild(o1) } catch(e) { }
try { document.documentElement.getClientRects() } catch(e) { }
try { o4 = o2.attachShadow({ mode: "open" }); } catch(e) { }
try { o1.appendChild(o3) } catch(e) { }
try { o5 = o3.parentElement } catch(e) { }
try { o3.outerHTML = "\n" } catch(e) { }
try { o4.prepend("", o5, "") } catch(e) { }
</script>
</head>
</html>