Having trouble with xml based templating engines that don't allow you to declare a modern doctype? Use this little snippet to dynamically switch it to something sane!

doctype switcher

<script>
	(function switchToHTML5() {
		// create an html5 doctype
		var newDoctype = document.implementation.createDocumentType('html', '', '');

		if (document.doctype) {
			document.doctype.parentNode.replaceChild(newDoctype, document.doctype);
		} else {
			var currentHtml = document.head.parentNode;
			currentHtml.parentNode.insertBefore(newDoctype, currentHtml)
		}
	})();
</script>

doesn't work