Definition
HTML Standard defines HTMLDialogElement
[Exposed=Window]
interface HTMLDialogElement : HTMLElement {
[HTMLConstructor] constructor();
[CEReactions, Reflect] attribute boolean open;
attribute DOMString returnValue;
[CEReactions, ReflectSetter] attribute DOMString closedBy;
[CEReactions] undefined show();
[CEReactions] undefined showModal();
[CEReactions] undefined close(optional DOMString returnValue);
[CEReactions] undefined requestClose(optional DOMString returnValue);
};