#import
// https://html.spec.whatwg.org/multipage/interaction.html#toggleevent
[Exposed=Window]
interface ToggleEvent : Event {
constructor(DOMString type, optional ToggleEventInit eventInitDict = {});
readonly attribute DOMString oldState;
readonly attribute DOMString newState;
};
dictionary ToggleEventInit : EventInit {
DOMString oldState = "";
DOMString newState = "";
};