define(function(){returnfunction(elem){// Support: IE<=11+, Firefox<=30+ (#15098, #14150)
// IE throws on elements created in popups
// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
if(elem.ownerDocument.defaultView.opener){returnelem.ownerDocument.defaultView.getComputedStyle(elem, null);}returnwindow.getComputedStyle(elem, null);};});