<svg xmlns="http://www.w3.org/2000/svg" xmlns:html="http://www.w3.org/1999/xhtml" onload="setTimeout(boom, 30);" class="reftest-wait"> <html:script> function boom() { try { document.getElementById("defs").getBBox(); } catch(e) { // getBBox is expected to throw, because defs is not displayed. document.documentElement.removeAttribute("class"); } } </html:script> <defs id="defs" /> </svg>