<html xmlns="http://www.w3.org/1999/xhtml"> <head> <script> function init() { var targetWindow = window.frames[0]; var targetDocument = targetWindow.document; var rootish = document.getElementById('rootish'); targetDocument.body.appendChild(targetDocument.adoptNode(rootish)); targetDocument.designMode = 'on'; targetWindow.getSelection().removeAllRanges(); var r = targetDocument.createRange(); r.setStart(targetDocument.getElementById("start"), 0); r.setEnd (targetDocument.getElementById("endparent").firstChild, 0); targetWindow.getSelection().addRange(r); targetDocument.execCommand('outdent', false, null); } </script> </head> <body onload="setTimeout(init, 300);"> <iframe src="data:text/html," style="width: 95%; height: 500px;"></iframe> <div id="rootish"> <div id="start"></div> <p>Huh</p> <svg xmlns="http://www.w3.org/2000/svg" id="endparent"> </svg> </div> </body> </html>