acklen-keystone/admin/public/js/lib/ckeditor/plugins/preview/preview.html

Web Application Framework and Admin GUI / Content Management System built on Express.js and Mongoose

<script>

// Prevent from DOM clobbering.
if ( typeof window.opener._cke_htmlToLoad == 'string' ) {
	var doc = document;
	doc.open();
	doc.write( window.opener._cke_htmlToLoad );
	doc.close();

	delete window.opener._cke_htmlToLoad;
}

</script>