interface HTMLIFrameElement : HTMLElement {

    [Reflect] attribute DOMString src;
    [Reflect] attribute DOMString srcdoc;
    [Reflect] attribute DOMString name;
    [Reflect] attribute DOMString allow;
    [Reflect] attribute DOMString width;
    [Reflect] attribute DOMString height;
    [Reflect=allowfullscreen] attribute boolean allowFullscreen;

    [ReturnNullIfCrossOrigin] readonly attribute Document? contentDocument;

    [Reflect] attribute DOMString align;
    [Reflect] attribute DOMString scrolling;
    [Reflect=frameborder] attribute DOMString frameBorder;

    [LegacyNullToEmptyString, Reflect=marginheight] attribute DOMString marginHeight;
    [LegacyNullToEmptyString, Reflect=marginwidth] attribute DOMString marginWidth;
};