// -----------------------------------------------------------------------------
// DOM
// -----------------------------------------------------------------------------
[Constructor(), Exposed=(Window,Worker)]
interface EventTarget {
  void addEventListener(DOMString type, EventListener? callback, optional (AddEventListenerOptions or boolean) options);
  void removeEventListener(DOMString type, EventListener? callback, optional (EventListenerOptions or boolean) options);
  boolean dispatchEvent(Event event);
};

callback interface EventListener {
  void handleEvent(Event event);
};

dictionary EventListenerOptions {
  boolean capture = false;
};

dictionary AddEventListenerOptions : EventListenerOptions {
  boolean passive = false;
  boolean once = false;
};

// -----------------------------------------------------------------------------
// HTML
// -----------------------------------------------------------------------------
[TreatNonCallableAsNull]
callback EventHandlerNonNull = any (Event event);
typedef EventHandlerNonNull? EventHandler;

[TreatNonCallableAsNull]
callback OnErrorEventHandlerNonNull = any ((Event or DOMString) event, optional DOMString source, optional unsigned long lineno, optional unsigned long column, optional any error);
typedef OnErrorEventHandlerNonNull? OnErrorEventHandler;

[Exposed=Worker]
interface WorkerGlobalScope : EventTarget {
  readonly attribute WorkerGlobalScope self;
  readonly attribute WorkerLocation location;
  readonly attribute WorkerNavigator navigator;
  void importScripts(USVString... urls);

  attribute OnErrorEventHandler onerror;
  attribute EventHandler onlanguagechange;
  attribute EventHandler onoffline;
  attribute EventHandler ononline;
  attribute EventHandler onrejectionhandled;
  attribute EventHandler onunhandledrejection;
};

[Global=(Worker,DedicatedWorker),Exposed=DedicatedWorker]
interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
  [Replaceable] readonly attribute DOMString name;

  void postMessage(any message, optional sequence<object> transfer = []);

  void close();

  attribute EventHandler onmessage;
  attribute EventHandler onmessageerror;
};

typedef (DOMString or Function) TimerHandler;

[NoInterfaceObject, Exposed=(Window,Worker)]
interface WindowOrWorkerGlobalScope {
  [Replaceable] readonly attribute USVString origin;

  // base64 utility methods
  DOMString btoa(DOMString data);
  DOMString atob(DOMString data);

  // timers
  long setTimeout(TimerHandler handler, optional long timeout = 0, any... arguments);
  void clearTimeout(optional long handle = 0);
  long setInterval(TimerHandler handler, optional long timeout = 0, any... arguments);
  void clearInterval(optional long handle = 0);

  // ImageBitmap
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image, optional ImageBitmapOptions options);
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image, long sx, long sy, long sw, long sh, optional ImageBitmapOptions options);
};
WorkerGlobalScope implements WindowOrWorkerGlobalScope;

[Exposed=Worker]
interface WorkerNavigator {};
WorkerNavigator implements NavigatorID;
WorkerNavigator implements NavigatorLanguage;
WorkerNavigator implements NavigatorOnLine;
WorkerNavigator implements NavigatorConcurrentHardware;

[NoInterfaceObject, Exposed=(Window,Worker)]
interface NavigatorID {
  readonly attribute DOMString appCodeName; // constant "Mozilla"
  readonly attribute DOMString appName; // constant "Netscape"
  readonly attribute DOMString appVersion;
  readonly attribute DOMString platform;
  readonly attribute DOMString product; // constant "Gecko"
  [Exposed=Window] readonly attribute DOMString productSub;
  readonly attribute DOMString userAgent;
  [Exposed=Window] readonly attribute DOMString vendor;
  [Exposed=Window] readonly attribute DOMString vendorSub; // constant ""

  // also has additional members in a partial interface
};

[NoInterfaceObject, Exposed=(Window,Worker)]
interface NavigatorLanguage {
  readonly attribute DOMString language;
  readonly attribute FrozenArray<DOMString> languages;
};

[NoInterfaceObject, Exposed=(Window,Worker)]
interface NavigatorOnLine {
  readonly attribute boolean onLine;
};

[NoInterfaceObject, Exposed=(Window,Worker)]
interface NavigatorConcurrentHardware {
  readonly attribute unsigned long long hardwareConcurrency;
};

[Exposed=Worker]
interface WorkerLocation {
  stringifier readonly attribute USVString href;
  readonly attribute USVString origin;
  readonly attribute USVString protocol;
  readonly attribute USVString host;
  readonly attribute USVString hostname;
  readonly attribute USVString port;
  readonly attribute USVString pathname;
  readonly attribute USVString search;
  readonly attribute USVString hash;
};