Definition
HTML Standard defines HTMLSourceElement
[Exposed=Window]
interface HTMLSourceElement : HTMLElement {
[HTMLConstructor] constructor();
[CEReactions] attribute USVString src;
[CEReactions] attribute DOMString type;
[CEReactions] attribute USVString srcset;
[CEReactions] attribute DOMString sizes;
[CEReactions] attribute DOMString media;
[CEReactions] attribute unsigned long width;
[CEReactions] attribute unsigned long height;
};