interface HTMLAllCollection : HTMLCollection {
  // inherits length and item()
  legacycaller getter object? namedItem(DOMString name); // overrides inherited namedItem()
  HTMLAllCollection tags(DOMString tagName);
};

interface HTMLFormControlsCollection : HTMLCollection {
  // inherits length and item()
  legacycaller getter object? namedItem(DOMString name); // overrides inherited namedItem()
};

interface RadioNodeList : NodeList {
          attribute DOMString value;
};

interface HTMLOptionsCollection : HTMLCollection {
  // inherits item()
           attribute unsigned long length; // overrides inherited length
  legacycaller getter object? namedItem(DOMString name); // overrides inherited namedItem()
  setter creator void (unsigned long index, HTMLOptionElement option);
  void add(HTMLOptionElement element, optional HTMLElement? before);
  void add(HTMLOptGroupElement element, optional HTMLElement? before);
  void add(HTMLOptionElement element, long before);
  void add(HTMLOptGroupElement element, long before);
  void remove(long index);
           attribute long selectedIndex;
};

interface HTMLPropertiesCollection : HTMLCollection {
  // inherits length and item()
  legacycaller getter PropertyNodeList? namedItem(DOMString name); // overrides inherited namedItem()
  readonly attribute DOMStringList names;
};

typedef sequence<any> PropertyValueArray;

interface PropertyNodeList : NodeList {
  PropertyValueArray getValues();
};

interface DOMStringMap {
  getter DOMString (DOMString name);
  setter void (DOMString name, DOMString value);
  creator void (DOMString name, DOMString value);
  deleter void (DOMString name);
};

interface DOMElementMap {
  getter Element (DOMString name);
  setter void (DOMString name, Element value);
  creator void (DOMString name, Element value);
  deleter void (DOMString name);
};

[NoInterfaceObject]
interface Transferable { };

[OverrideBuiltins]
partial interface Document {
  // resource metadata management
  [PutForwards=href] readonly attribute Location? location;
  readonly attribute DOMString URL;
           attribute DOMString domain;
  readonly attribute DOMString referrer;
           attribute DOMString cookie;
  readonly attribute DOMString lastModified;
  readonly attribute DOMString readyState;

  // DOM tree accessors
  getter object (DOMString name);
           attribute DOMString title;
           attribute DOMString dir;
           attribute HTMLElement? body;
  readonly attribute HTMLHeadElement? head;
  readonly attribute HTMLCollection images;
  readonly attribute HTMLCollection embeds;
  readonly attribute HTMLCollection plugins;
  readonly attribute HTMLCollection links;
  readonly attribute HTMLCollection forms;
  readonly attribute HTMLCollection scripts;
  NodeList getElementsByName(DOMString elementName);
  NodeList getItems(optional DOMString typeNames); // microdata
  readonly attribute DOMElementMap cssElementMap;

  // dynamic markup insertion
  Document open(optional DOMString type, optional DOMString replace);
  WindowProxy open(DOMString url, DOMString name, DOMString features, optional boolean replace);
  void close();
  void write(DOMString... text);
  void writeln(DOMString... text);

  // user interaction
  readonly attribute WindowProxy? defaultView;
  readonly attribute Element? activeElement;
  boolean hasFocus();
           attribute DOMString designMode;
  boolean execCommand(DOMString commandId);
  boolean execCommand(DOMString commandId, boolean showUI);
  boolean execCommand(DOMString commandId, boolean showUI, DOMString value);
  boolean queryCommandEnabled(DOMString commandId);
  boolean queryCommandIndeterm(DOMString commandId);
  boolean queryCommandState(DOMString commandId);
  boolean queryCommandSupported(DOMString commandId);
  DOMString queryCommandValue(DOMString commandId);
  readonly attribute HTMLCollection commands;

  // event handler IDL attributes
  [TreatNonCallableAsNull] attribute Function? onabort;
  [TreatNonCallableAsNull] attribute Function? onblur;
  [TreatNonCallableAsNull] attribute Function? oncanplay;
  [TreatNonCallableAsNull] attribute Function? oncanplaythrough;
  [TreatNonCallableAsNull] attribute Function? onchange;
  [TreatNonCallableAsNull] attribute Function? onclick;
  [TreatNonCallableAsNull] attribute Function? oncontextmenu;
  [TreatNonCallableAsNull] attribute Function? oncuechange;
  [TreatNonCallableAsNull] attribute Function? ondblclick;
  [TreatNonCallableAsNull] attribute Function? ondrag;
  [TreatNonCallableAsNull] attribute Function? ondragend;
  [TreatNonCallableAsNull] attribute Function? ondragenter;
  [TreatNonCallableAsNull] attribute Function? ondragleave;
  [TreatNonCallableAsNull] attribute Function? ondragover;
  [TreatNonCallableAsNull] attribute Function? ondragstart;
  [TreatNonCallableAsNull] attribute Function? ondrop;
  [TreatNonCallableAsNull] attribute Function? ondurationchange;
  [TreatNonCallableAsNull] attribute Function? onemptied;
  [TreatNonCallableAsNull] attribute Function? onended;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onfocus;
  [TreatNonCallableAsNull] attribute Function? oninput;
  [TreatNonCallableAsNull] attribute Function? oninvalid;
  [TreatNonCallableAsNull] attribute Function? onkeydown;
  [TreatNonCallableAsNull] attribute Function? onkeypress;
  [TreatNonCallableAsNull] attribute Function? onkeyup;
  [TreatNonCallableAsNull] attribute Function? onload;
  [TreatNonCallableAsNull] attribute Function? onloadeddata;
  [TreatNonCallableAsNull] attribute Function? onloadedmetadata;
  [TreatNonCallableAsNull] attribute Function? onloadstart;
  [TreatNonCallableAsNull] attribute Function? onmousedown;
  [TreatNonCallableAsNull] attribute Function? onmousemove;
  [TreatNonCallableAsNull] attribute Function? onmouseout;
  [TreatNonCallableAsNull] attribute Function? onmouseover;
  [TreatNonCallableAsNull] attribute Function? onmouseup;
  [TreatNonCallableAsNull] attribute Function? onmousewheel;
  [TreatNonCallableAsNull] attribute Function? onpause;
  [TreatNonCallableAsNull] attribute Function? onplay;
  [TreatNonCallableAsNull] attribute Function? onplaying;
  [TreatNonCallableAsNull] attribute Function? onprogress;
  [TreatNonCallableAsNull] attribute Function? onratechange;
  [TreatNonCallableAsNull] attribute Function? onreset;
  [TreatNonCallableAsNull] attribute Function? onscroll;
  [TreatNonCallableAsNull] attribute Function? onseeked;
  [TreatNonCallableAsNull] attribute Function? onseeking;
  [TreatNonCallableAsNull] attribute Function? onselect;
  [TreatNonCallableAsNull] attribute Function? onshow;
  [TreatNonCallableAsNull] attribute Function? onstalled;
  [TreatNonCallableAsNull] attribute Function? onsubmit;
  [TreatNonCallableAsNull] attribute Function? onsuspend;
  [TreatNonCallableAsNull] attribute Function? ontimeupdate;
  [TreatNonCallableAsNull] attribute Function? onvolumechange;
  [TreatNonCallableAsNull] attribute Function? onwaiting;

  // special event handler IDL attributes that only apply to Document objects
  [TreatNonCallableAsNull,LenientThis] attribute Function? onreadystatechange;
};

partial interface XMLDocument {
  boolean load(DOMString url);
};

interface HTMLElement : Element {
  // metadata attributes
           attribute DOMString title;
           attribute DOMString lang;
           attribute DOMString dir;
           attribute DOMString className;
  readonly attribute DOMTokenList classList;
  readonly attribute DOMStringMap dataset;

  // microdata
           attribute boolean itemScope;
  [PutForwards=value] readonly attribute DOMSettableTokenList itemType;
           attribute DOMString itemId;
  [PutForwards=value] readonly attribute DOMSettableTokenList itemRef;
  [PutForwards=value] readonly attribute DOMSettableTokenList itemProp;
  readonly attribute HTMLPropertiesCollection properties;
           attribute any itemValue;

  // user interaction
           attribute boolean hidden;
  void click();
           attribute long tabIndex;
  void focus();
  void blur();
           attribute DOMString accessKey;
  readonly attribute DOMString accessKeyLabel;
           attribute boolean draggable;
  [PutForwards=value] readonly attribute DOMSettableTokenList dropzone;
           attribute DOMString contentEditable;
  readonly attribute boolean isContentEditable;
           attribute HTMLMenuElement? contextMenu;
           attribute boolean spellcheck;

  // command API
  readonly attribute DOMString? commandType;
  readonly attribute DOMString? commandLabel;
  readonly attribute DOMString? commandIcon;
  readonly attribute boolean? commandHidden;
  readonly attribute boolean? commandDisabled;
  readonly attribute boolean? commandChecked;

  // styling
  readonly attribute CSSStyleDeclaration style;

  // event handler IDL attributes
  [TreatNonCallableAsNull] attribute Function? onabort;
  [TreatNonCallableAsNull] attribute Function? onblur;
  [TreatNonCallableAsNull] attribute Function? oncanplay;
  [TreatNonCallableAsNull] attribute Function? oncanplaythrough;
  [TreatNonCallableAsNull] attribute Function? onchange;
  [TreatNonCallableAsNull] attribute Function? onclick;
  [TreatNonCallableAsNull] attribute Function? oncontextmenu;
  [TreatNonCallableAsNull] attribute Function? oncuechange;
  [TreatNonCallableAsNull] attribute Function? ondblclick;
  [TreatNonCallableAsNull] attribute Function? ondrag;
  [TreatNonCallableAsNull] attribute Function? ondragend;
  [TreatNonCallableAsNull] attribute Function? ondragenter;
  [TreatNonCallableAsNull] attribute Function? ondragleave;
  [TreatNonCallableAsNull] attribute Function? ondragover;
  [TreatNonCallableAsNull] attribute Function? ondragstart;
  [TreatNonCallableAsNull] attribute Function? ondrop;
  [TreatNonCallableAsNull] attribute Function? ondurationchange;
  [TreatNonCallableAsNull] attribute Function? onemptied;
  [TreatNonCallableAsNull] attribute Function? onended;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onfocus;
  [TreatNonCallableAsNull] attribute Function? oninput;
  [TreatNonCallableAsNull] attribute Function? oninvalid;
  [TreatNonCallableAsNull] attribute Function? onkeydown;
  [TreatNonCallableAsNull] attribute Function? onkeypress;
  [TreatNonCallableAsNull] attribute Function? onkeyup;
  [TreatNonCallableAsNull] attribute Function? onload;
  [TreatNonCallableAsNull] attribute Function? onloadeddata;
  [TreatNonCallableAsNull] attribute Function? onloadedmetadata;
  [TreatNonCallableAsNull] attribute Function? onloadstart;
  [TreatNonCallableAsNull] attribute Function? onmousedown;
  [TreatNonCallableAsNull] attribute Function? onmousemove;
  [TreatNonCallableAsNull] attribute Function? onmouseout;
  [TreatNonCallableAsNull] attribute Function? onmouseover;
  [TreatNonCallableAsNull] attribute Function? onmouseup;
  [TreatNonCallableAsNull] attribute Function? onmousewheel;
  [TreatNonCallableAsNull] attribute Function? onpause;
  [TreatNonCallableAsNull] attribute Function? onplay;
  [TreatNonCallableAsNull] attribute Function? onplaying;
  [TreatNonCallableAsNull] attribute Function? onprogress;
  [TreatNonCallableAsNull] attribute Function? onratechange;
  [TreatNonCallableAsNull] attribute Function? onreset;
  [TreatNonCallableAsNull] attribute Function? onscroll;
  [TreatNonCallableAsNull] attribute Function? onseeked;
  [TreatNonCallableAsNull] attribute Function? onseeking;
  [TreatNonCallableAsNull] attribute Function? onselect;
  [TreatNonCallableAsNull] attribute Function? onshow;
  [TreatNonCallableAsNull] attribute Function? onstalled;
  [TreatNonCallableAsNull] attribute Function? onsubmit;
  [TreatNonCallableAsNull] attribute Function? onsuspend;
  [TreatNonCallableAsNull] attribute Function? ontimeupdate;
  [TreatNonCallableAsNull] attribute Function? onvolumechange;
  [TreatNonCallableAsNull] attribute Function? onwaiting;
};

interface HTMLUnknownElement : HTMLElement { };

interface HTMLHtmlElement : HTMLElement {};

interface HTMLHeadElement : HTMLElement {};

interface HTMLTitleElement : HTMLElement {
           attribute DOMString text;
};

interface HTMLBaseElement : HTMLElement {
           attribute DOMString href;
           attribute DOMString target;
};

interface HTMLLinkElement : HTMLElement {
           attribute boolean disabled;
           attribute DOMString href;
           attribute DOMString rel;
  readonly attribute DOMTokenList relList;
           attribute DOMString media;
           attribute DOMString hreflang;
           attribute DOMString type;
  [PutForwards=value] readonly attribute DOMSettableTokenList sizes;
};
HTMLLinkElement implements LinkStyle;

interface HTMLMetaElement : HTMLElement {
           attribute DOMString name;
           attribute DOMString httpEquiv;
           attribute DOMString content;
};

interface HTMLStyleElement : HTMLElement {
           attribute boolean disabled;
           attribute DOMString media;
           attribute DOMString type;
           attribute boolean scoped;
};
HTMLStyleElement implements LinkStyle;

interface HTMLScriptElement : HTMLElement {
           attribute DOMString src;
           attribute boolean async;
           attribute boolean defer;
           attribute DOMString type;
           attribute DOMString charset;
           attribute DOMString text;
};

interface HTMLBodyElement : HTMLElement {
  [TreatNonCallableAsNull] attribute Function? onafterprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeunload;
  [TreatNonCallableAsNull] attribute Function? onblur;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onfocus;
  [TreatNonCallableAsNull] attribute Function? onhashchange;
  [TreatNonCallableAsNull] attribute Function? onload;
  [TreatNonCallableAsNull] attribute Function? onmessage;
  [TreatNonCallableAsNull] attribute Function? onoffline;
  [TreatNonCallableAsNull] attribute Function? ononline;
  [TreatNonCallableAsNull] attribute Function? onpopstate;
  [TreatNonCallableAsNull] attribute Function? onpagehide;
  [TreatNonCallableAsNull] attribute Function? onpageshow;
  [TreatNonCallableAsNull] attribute Function? onresize;
  [TreatNonCallableAsNull] attribute Function? onscroll;
  [TreatNonCallableAsNull] attribute Function? onstorage;
  [TreatNonCallableAsNull] attribute Function? onunload;
};

interface HTMLHeadingElement : HTMLElement {};

interface HTMLParagraphElement : HTMLElement {};

interface HTMLHRElement : HTMLElement {};

interface HTMLPreElement : HTMLElement {};

interface HTMLQuoteElement : HTMLElement {
           attribute DOMString cite;
};

interface HTMLOListElement : HTMLElement {
           attribute boolean reversed;
           attribute long start;
           attribute DOMString type;
};

interface HTMLUListElement : HTMLElement {};

interface HTMLLIElement : HTMLElement {
           attribute long value;
};

interface HTMLDListElement : HTMLElement {};

interface HTMLDivElement : HTMLElement {};

interface HTMLAnchorElement : HTMLElement {
  stringifier attribute DOMString href;
           attribute DOMString target;

           attribute DOMString download;
           attribute DOMString ping;

           attribute DOMString rel;
  readonly attribute DOMTokenList relList;
           attribute DOMString media;
           attribute DOMString hreflang;
           attribute DOMString type;

           attribute DOMString text;

  // URL decomposition IDL attributes
           attribute DOMString protocol;
           attribute DOMString host;
           attribute DOMString hostname;
           attribute DOMString port;
           attribute DOMString pathname;
           attribute DOMString search;
           attribute DOMString hash;
};

interface HTMLDataElement : HTMLElement {
           attribute DOMString value;
};

interface HTMLSpanElement : HTMLElement {};

interface HTMLBRElement : HTMLElement {};

interface HTMLModElement : HTMLElement {
           attribute DOMString cite;
           attribute DOMString dateTime;
};

[NamedConstructor=Image(),
 NamedConstructor=Image(unsigned long width),
 NamedConstructor=Image(unsigned long width, unsigned long height)]
interface HTMLImageElement : HTMLElement {
           attribute DOMString alt;
           attribute DOMString src;
           attribute DOMString crossOrigin;
           attribute DOMString useMap;
           attribute boolean isMap;
           attribute unsigned long width;
           attribute unsigned long height;
  readonly attribute unsigned long naturalWidth;
  readonly attribute unsigned long naturalHeight;
  readonly attribute boolean complete;
};

interface HTMLIFrameElement : HTMLElement {
           attribute DOMString src;
           attribute DOMString srcdoc;
           attribute DOMString name;
  [PutForwards=value] readonly attribute DOMSettableTokenList sandbox;
           attribute boolean seamless;
           attribute DOMString width;
           attribute DOMString height;
  readonly attribute Document? contentDocument;
  readonly attribute WindowProxy? contentWindow;
};

interface HTMLEmbedElement : HTMLElement {
           attribute DOMString src;
           attribute DOMString type;
           attribute DOMString width;
           attribute DOMString height;
};

interface HTMLObjectElement : HTMLElement {
           attribute DOMString data;
           attribute DOMString type;
           attribute boolean typeMustMatch;
           attribute DOMString name;
           attribute DOMString useMap;
  readonly attribute HTMLFormElement? form;
           attribute DOMString width;
           attribute DOMString height;
  readonly attribute Document? contentDocument;
  readonly attribute WindowProxy? contentWindow;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);
};

interface HTMLParamElement : HTMLElement {
           attribute DOMString name;
           attribute DOMString value;
};

interface HTMLVideoElement : HTMLMediaElement {
           attribute unsigned long width;
           attribute unsigned long height;
  readonly attribute unsigned long videoWidth;
  readonly attribute unsigned long videoHeight;
           attribute DOMString poster;
};

[NamedConstructor=Audio(),
 NamedConstructor=Audio(DOMString src)]
interface HTMLAudioElement : HTMLMediaElement {};

interface HTMLSourceElement : HTMLElement {
           attribute DOMString src;
           attribute DOMString type;
           attribute DOMString media;
};

interface HTMLTrackElement : HTMLElement {
           attribute DOMString kind;
           attribute DOMString src;
           attribute DOMString srclang;
           attribute DOMString label;
           attribute boolean default;

  const unsigned short NONE = 0;
  const unsigned short LOADING = 1;
  const unsigned short LOADED = 2;
  const unsigned short ERROR = 3;
  readonly attribute unsigned short readyState;

  readonly attribute TextTrack track;
};

interface HTMLMediaElement : HTMLElement {

  // error state
  readonly attribute MediaError? error;

  // network state
           attribute DOMString src;
  readonly attribute DOMString currentSrc;
           attribute DOMString crossOrigin;
  const unsigned short NETWORK_EMPTY = 0;
  const unsigned short NETWORK_IDLE = 1;
  const unsigned short NETWORK_LOADING = 2;
  const unsigned short NETWORK_NO_SOURCE = 3;
  readonly attribute unsigned short networkState;
           attribute DOMString preload;
  readonly attribute TimeRanges buffered;
  void load();
  DOMString canPlayType(DOMString type);

  // ready state
  const unsigned short HAVE_NOTHING = 0;
  const unsigned short HAVE_METADATA = 1;
  const unsigned short HAVE_CURRENT_DATA = 2;
  const unsigned short HAVE_FUTURE_DATA = 3;
  const unsigned short HAVE_ENOUGH_DATA = 4;
  readonly attribute unsigned short readyState;
  readonly attribute boolean seeking;

  // playback state
           attribute double currentTime;
  readonly attribute double initialTime;
  readonly attribute double duration;
  readonly attribute Date startOffsetTime;
  readonly attribute boolean paused;
           attribute double defaultPlaybackRate;
           attribute double playbackRate;
  readonly attribute TimeRanges played;
  readonly attribute TimeRanges seekable;
  readonly attribute boolean ended;
           attribute boolean autoplay;
           attribute boolean loop;
  void play();
  void pause();

  // media controller
           attribute DOMString mediaGroup;
           attribute MediaController? controller;

  // controls
           attribute boolean controls;
           attribute double volume;
           attribute boolean muted;
           attribute boolean defaultMuted;

  // tracks
  readonly attribute AudioTrackList audioTracks;
  readonly attribute VideoTrackList videoTracks;
  readonly attribute TextTrackList textTracks;
  TextTrack addTextTrack(DOMString kind, optional DOMString label, optional DOMString language);
};

interface MediaError {
  const unsigned short MEDIA_ERR_ABORTED = 1;
  const unsigned short MEDIA_ERR_NETWORK = 2;
  const unsigned short MEDIA_ERR_DECODE = 3;
  const unsigned short MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
  readonly attribute unsigned short code;
};

interface AudioTrackList {
  readonly attribute unsigned long length;
  getter AudioTrack (unsigned long index);
  AudioTrack? getTrackById(DOMString id);

  [TreatNonCallableAsNull] attribute Function? onchange;
  [TreatNonCallableAsNull] attribute Function? onaddtrack;
};

interface AudioTrack {
  readonly attribute DOMString id;
  readonly attribute DOMString kind;
  readonly attribute DOMString label;
  readonly attribute DOMString language;
           attribute boolean enabled;
};

interface VideoTrackList {
  readonly attribute unsigned long length;
  getter VideoTrack (unsigned long index);
  VideoTrack? getTrackById(DOMString id);
  readonly attribute long selectedIndex;

  [TreatNonCallableAsNull] attribute Function? onchange;
  [TreatNonCallableAsNull] attribute Function? onaddtrack;
};

interface VideoTrack {
  readonly attribute DOMString id;
  readonly attribute DOMString kind;
  readonly attribute DOMString label;
  readonly attribute DOMString language;
           attribute boolean selected;
};

[Constructor]
interface MediaController {
  readonly attribute TimeRanges buffered;
  readonly attribute TimeRanges seekable;
  readonly attribute double duration;
           attribute double currentTime;

  readonly attribute boolean paused;
  readonly attribute TimeRanges played;
  void play();
  void pause();

           attribute double defaultPlaybackRate;
           attribute double playbackRate;

           attribute double volume;
           attribute boolean muted;

  [TreatNonCallableAsNull] attribute Function? onemptied;
  [TreatNonCallableAsNull] attribute Function? onloadedmetadata;
  [TreatNonCallableAsNull] attribute Function? onloadeddata;
  [TreatNonCallableAsNull] attribute Function? oncanplay;
  [TreatNonCallableAsNull] attribute Function? oncanplaythrough;
  [TreatNonCallableAsNull] attribute Function? onplaying;
  [TreatNonCallableAsNull] attribute Function? onended;
  [TreatNonCallableAsNull] attribute Function? onwaiting;

  [TreatNonCallableAsNull] attribute Function? ondurationchange;
  [TreatNonCallableAsNull] attribute Function? ontimeupdate;
  [TreatNonCallableAsNull] attribute Function? onplay;
  [TreatNonCallableAsNull] attribute Function? onpause;
  [TreatNonCallableAsNull] attribute Function? onratechange;
  [TreatNonCallableAsNull] attribute Function? onvolumechange;
};

interface TextTrackList {
  readonly attribute unsigned long length;
  getter TextTrack (unsigned long index);

  [TreatNonCallableAsNull] attribute Function? onaddtrack;
};

interface TextTrack : EventTarget {
  readonly attribute DOMString kind;
  readonly attribute DOMString label;
  readonly attribute DOMString language;

  const unsigned short DISABLED = 0;
  const unsigned short HIDDEN = 1;
  const unsigned short SHOWING = 2;
           attribute unsigned short mode;

  readonly attribute TextTrackCueList? cues;
  readonly attribute TextTrackCueList? activeCues;

  void addCue(TextTrackCue cue);
  void removeCue(TextTrackCue cue);

  [TreatNonCallableAsNull] attribute Function? oncuechange;
};

interface TextTrackCueList {
  readonly attribute unsigned long length;
  getter TextTrackCue (unsigned long index);
  TextTrackCue? getCueById(DOMString id);
};


[Constructor(DOMString id, double startTime, double endTime, DOMString text, optional DOMString settings, optional boolean pauseOnExit)]
interface TextTrackCue : EventTarget {
  readonly attribute TextTrack? track;

           attribute DOMString id;
           attribute double startTime;
           attribute double endTime;
           attribute boolean pauseOnExit;
           attribute DOMString direction;
           attribute boolean snapToLines;
           attribute long linePosition;
           attribute long textPosition;
           attribute long size;
           attribute DOMString alignment;
           attribute DOMString cueAsSource;
  DocumentFragment getCueAsHTML();

  [TreatNonCallableAsNull] attribute Function? onenter;
  [TreatNonCallableAsNull] attribute Function? onexit;
};

interface TimeRanges {
  readonly attribute unsigned long length;
  double start(unsigned long index);
  double end(unsigned long index);
};

[Constructor(DOMString type, optional TrackEventInit eventInitDict)]
interface TrackEvent : Event {
  readonly attribute object? track;
};

dictionary TrackEventInit : EventInit {
  object? Track;
};

interface HTMLCanvasElement : HTMLElement {
           attribute unsigned long width;
           attribute unsigned long height;

  DOMString toDataURL(optional DOMString type, any... args);
  void toBlob(FileCallback? callback, optional DOMString type, any... args);

  object? getContext(DOMString contextId, any... args);
};

interface CanvasRenderingContext2D {

  // back-reference to the canvas
  readonly attribute HTMLCanvasElement canvas;

  // state
  void save(); // push state on state stack
  void restore(); // pop state stack and restore state

  // transformations (default transform is the identity matrix)
  void scale(double x, double y);
  void rotate(double angle);
  void translate(double x, double y);
  void transform(double a, double b, double c, double d, double e, double f);
  void setTransform(double a, double b, double c, double d, double e, double f);

  // compositing
           attribute double globalAlpha; // (default 1.0)
           attribute DOMString globalCompositeOperation; // (default source-over)

  // colors and styles
           attribute any strokeStyle; // (default black)
           attribute any fillStyle; // (default black)
  CanvasGradient createLinearGradient(double x0, double y0, double x1, double y1);
  CanvasGradient createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1);
  CanvasPattern createPattern(HTMLImageElement image, DOMString repetition);
  CanvasPattern createPattern(HTMLCanvasElement image, DOMString repetition);
  CanvasPattern createPattern(HTMLVideoElement image, DOMString repetition);

  // line caps/joins
           attribute double lineWidth; // (default 1)
           attribute DOMString lineCap; // "butt", "round", "square" (default "butt")
           attribute DOMString lineJoin; // "round", "bevel", "miter" (default "miter")
           attribute double miterLimit; // (default 10)

  // shadows
           attribute double shadowOffsetX; // (default 0)
           attribute double shadowOffsetY; // (default 0)
           attribute double shadowBlur; // (default 0)
           attribute DOMString shadowColor; // (default transparent black)

  // rects
  void clearRect(double x, double y, double w, double h);
  void fillRect(double x, double y, double w, double h);
  void strokeRect(double x, double y, double w, double h);

  // path API
  void beginPath();
  void closePath();
  void moveTo(double x, double y);
  void lineTo(double x, double y);
  void quadraticCurveTo(double cpx, double cpy, double x, double y);
  void bezierCurveTo(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y);
  void arcTo(double x1, double y1, double x2, double y2, double radius);
  void rect(double x, double y, double w, double h);
  void arc(double x, double y, double radius, double startAngle, double endAngle, optional boolean anticlockwise);
  void fill();
  void stroke();
  void drawSystemFocusRing(Element element);
  boolean drawCustomFocusRing(Element element);
  void scrollPathIntoView();
  void clip();
  boolean isPointInPath(double x, double y);

  // text
           attribute DOMString font; // (default 10px sans-serif)
           attribute DOMString textAlign; // "start", "end", "left", "right", "center" (default: "start")
           attribute DOMString textBaseline; // "top", "hanging", "middle", "alphabetic", "ideographic", "bottom" (default: "alphabetic")
  void fillText(DOMString text, double x, double y, optional double maxWidth);
  void strokeText(DOMString text, double x, double y, optional double maxWidth);
  TextMetrics measureText(DOMString text);

  // drawing images
  void drawImage(HTMLImageElement image, double dx, double dy);
  void drawImage(HTMLImageElement image, double dx, double dy, double dw, double dh);
  void drawImage(HTMLImageElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh);
  void drawImage(HTMLCanvasElement image, double dx, double dy);
  void drawImage(HTMLCanvasElement image, double dx, double dy, double dw, double dh);
  void drawImage(HTMLCanvasElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh);
  void drawImage(HTMLVideoElement image, double dx, double dy);
  void drawImage(HTMLVideoElement image, double dx, double dy, double dw, double dh);
  void drawImage(HTMLVideoElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh);

  // pixel manipulation
  ImageData createImageData(double sw, double sh);
  ImageData createImageData(ImageData imagedata);
  ImageData getImageData(double sx, double sy, double sw, double sh);
  void putImageData(ImageData imagedata, double dx, double dy);
  void putImageData(ImageData imagedata, double dx, double dy, double dirtyX, double dirtyY, double dirtyWidth, double dirtyHeight);
};

interface CanvasGradient {
  // opaque object
  void addColorStop(double offset, DOMString color);
};

interface CanvasPattern {
  // opaque object
};

interface TextMetrics {
  readonly attribute double width;
};

interface ImageData {
  readonly attribute unsigned long width;
  readonly attribute unsigned long height;
  readonly attribute Uint8ClampedArray data;
};

interface HTMLMapElement : HTMLElement {
           attribute DOMString name;
  readonly attribute HTMLCollection areas;
  readonly attribute HTMLCollection images;
};

interface HTMLAreaElement : HTMLElement {
           attribute DOMString alt;
           attribute DOMString coords;
           attribute DOMString shape;
  stringifier attribute DOMString href;
           attribute DOMString target;

           attribute DOMString download;
           attribute DOMString ping;

           attribute DOMString rel;
  readonly attribute DOMTokenList relList;
           attribute DOMString media;
           attribute DOMString hreflang;
           attribute DOMString type;

  // URL decomposition IDL attributes
           attribute DOMString protocol;
           attribute DOMString host;
           attribute DOMString hostname;
           attribute DOMString port;
           attribute DOMString pathname;
           attribute DOMString search;
           attribute DOMString hash;
};

interface HTMLTableElement : HTMLElement {
           attribute HTMLTableCaptionElement? caption;
  HTMLElement createCaption();
  void deleteCaption();
           attribute HTMLTableSectionElement? tHead;
  HTMLElement createTHead();
  void deleteTHead();
           attribute HTMLTableSectionElement? tFoot;
  HTMLElement createTFoot();
  void deleteTFoot();
  readonly attribute HTMLCollection tBodies;
  HTMLElement createTBody();
  readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index);
  void deleteRow(long index);
           attribute DOMString border;
};

interface HTMLTableCaptionElement : HTMLElement {};

interface HTMLTableColElement : HTMLElement {
           attribute unsigned long span;
};

interface HTMLTableSectionElement : HTMLElement {
  readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index);
  void deleteRow(long index);
};

interface HTMLTableRowElement : HTMLElement {
  readonly attribute long rowIndex;
  readonly attribute long sectionRowIndex;
  readonly attribute HTMLCollection cells;
  HTMLElement insertCell(optional long index);
  void deleteCell(long index);
};

interface HTMLTableDataCellElement : HTMLTableCellElement {};

interface HTMLTableHeaderCellElement : HTMLTableCellElement {
           attribute DOMString scope;
};

interface HTMLTableCellElement : HTMLElement {
           attribute unsigned long colSpan;
           attribute unsigned long rowSpan;
  [PutForwards=value] readonly attribute DOMSettableTokenList headers;
  readonly attribute long cellIndex;
};

[OverrideBuiltins]
interface HTMLFormElement : HTMLElement {
           attribute DOMString acceptCharset;
           attribute DOMString action;
           attribute DOMString autocomplete;
           attribute DOMString enctype;
           attribute DOMString encoding;
           attribute DOMString method;
           attribute DOMString name;
           attribute boolean noValidate;
           attribute DOMString target;

  readonly attribute HTMLFormControlsCollection elements;
  readonly attribute long length;
  getter Element (unsigned long index);
  getter object (DOMString name);

  void submit();
  void reset();
  boolean checkValidity();
};

interface HTMLFieldSetElement : HTMLElement {
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute DOMString name;

  readonly attribute DOMString type;

  readonly attribute HTMLFormControlsCollection elements;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);
};

interface HTMLLegendElement : HTMLElement {
  readonly attribute HTMLFormElement? form;
};

interface HTMLLabelElement : HTMLElement {
  readonly attribute HTMLFormElement? form;
           attribute DOMString htmlFor;
  readonly attribute HTMLElement? control;
};

interface HTMLInputElement : HTMLElement {
           attribute DOMString accept;
           attribute DOMString alt;
           attribute DOMString autocomplete;
           attribute boolean autofocus;
           attribute boolean defaultChecked;
           attribute boolean checked;
           attribute DOMString dirName;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
  readonly attribute FileList? files;
           attribute DOMString formAction;
           attribute DOMString formEnctype;
           attribute DOMString formMethod;
           attribute boolean formNoValidate;
           attribute DOMString formTarget;
           attribute unsigned long height;
           attribute boolean indeterminate;
  readonly attribute HTMLElement? list;
           attribute DOMString max;
           attribute long maxLength;
           attribute DOMString min;
           attribute boolean multiple;
           attribute DOMString name;
           attribute DOMString pattern;
           attribute DOMString placeholder;
           attribute boolean readOnly;
           attribute boolean required;
           attribute unsigned long size;
           attribute DOMString src;
           attribute DOMString step;
           attribute DOMString type;
           attribute DOMString defaultValue;
           attribute DOMString value;
           attribute Date valueAsDate;
           attribute double valueAsNumber;
           attribute unsigned long width;

  void stepUp(optional long n);
  void stepDown(optional long n);

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;

  void select();
           attribute unsigned long selectionStart;
           attribute unsigned long selectionEnd;
           attribute DOMString selectionDirection;
  void setSelectionRange(unsigned long start, unsigned long end, optional DOMString direction);
};

interface HTMLButtonElement : HTMLElement {
           attribute boolean autofocus;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute DOMString formAction;
           attribute DOMString formEnctype;
           attribute DOMString formMethod;
           attribute boolean formNoValidate;
           attribute DOMString formTarget;
           attribute DOMString name;
           attribute DOMString type;
           attribute DOMString value;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;
};

interface HTMLSelectElement : HTMLElement {
           attribute boolean autofocus;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute boolean multiple;
           attribute DOMString name;
           attribute boolean required;
           attribute unsigned long size;

  readonly attribute DOMString type;

  readonly attribute HTMLOptionsCollection options;
           attribute unsigned long length;
  getter Element item(unsigned long index);
  object namedItem(DOMString name);
  void add(HTMLOptionElement element, optional HTMLElement? before);
  void add(HTMLOptGroupElement element, optional HTMLElement? before);
  void add(HTMLOptionElement element, long before);
  void add(HTMLOptGroupElement element, long before);
  void remove(long index);
  setter creator void (unsigned long index, HTMLOptionElement option);

  readonly attribute HTMLCollection selectedOptions;
           attribute long selectedIndex;
           attribute DOMString value;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;
};

interface HTMLDataListElement : HTMLElement {
  readonly attribute HTMLCollection options;
};

interface HTMLOptGroupElement : HTMLElement {
           attribute boolean disabled;
           attribute DOMString label;
};

[NamedConstructor=Option(),
 NamedConstructor=Option(DOMString text),
 NamedConstructor=Option(DOMString text, DOMString value),
 NamedConstructor=Option(DOMString text, DOMString value, boolean defaultSelected),
 NamedConstructor=Option(DOMString text, DOMString value, boolean defaultSelected, boolean selected)]
interface HTMLOptionElement : HTMLElement {
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute DOMString label;
           attribute boolean defaultSelected;
           attribute boolean selected;
           attribute DOMString value;

           attribute DOMString text;
  readonly attribute long index;
};

interface HTMLTextAreaElement : HTMLElement {
           attribute boolean autofocus;
           attribute unsigned long cols;
           attribute DOMString dirName;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute long maxLength;
           attribute DOMString name;
           attribute DOMString placeholder;
           attribute boolean readOnly;
           attribute boolean required;
           attribute unsigned long rows;
           attribute DOMString wrap;

  readonly attribute DOMString type;
           attribute DOMString defaultValue;
           attribute DOMString value;
  readonly attribute unsigned long textLength;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;

  void select();
           attribute unsigned long selectionStart;
           attribute unsigned long selectionEnd;
           attribute DOMString selectionDirection;
  void setSelectionRange(unsigned long start, unsigned long end, optional DOMString direction);
};

interface HTMLKeygenElement : HTMLElement {
           attribute boolean autofocus;
           attribute DOMString challenge;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
           attribute DOMString keytype;
           attribute DOMString name;

  readonly attribute DOMString type;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;
};

interface HTMLOutputElement : HTMLElement {
  [PutForwards=value] readonly attribute DOMSettableTokenList htmlFor;
  readonly attribute HTMLFormElement? form;
           attribute DOMString name;

  readonly attribute DOMString type;
           attribute DOMString defaultValue;
           attribute DOMString value;

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;
};

interface HTMLProgressElement : HTMLElement {
           attribute double value;
           attribute double max;
  readonly attribute double position;
  readonly attribute NodeList labels;
};

interface HTMLMeterElement : HTMLElement {
           attribute double value;
           attribute double min;
           attribute double max;
           attribute double low;
           attribute double high;
           attribute double optimum;
  readonly attribute NodeList labels;
};

interface ValidityState {
  readonly attribute boolean valueMissing;
  readonly attribute boolean typeMismatch;
  readonly attribute boolean patternMismatch;
  readonly attribute boolean tooLong;
  readonly attribute boolean rangeUnderflow;
  readonly attribute boolean rangeOverflow;
  readonly attribute boolean stepMismatch;
  readonly attribute boolean customError;
  readonly attribute boolean valid;
};

interface HTMLDetailsElement : HTMLElement {
           attribute boolean open;
};

interface HTMLCommandElement : HTMLElement {
           attribute DOMString type;
           attribute DOMString label;
           attribute DOMString icon;
           attribute boolean disabled;
           attribute boolean checked;
           attribute DOMString radiogroup;
};

interface HTMLMenuElement : HTMLElement {
           attribute DOMString type;
           attribute DOMString label;
};

[ReplaceableNamedProperties]
interface Window : EventTarget {
  // the current browsing context
  [Unforgeable] readonly attribute WindowProxy window;
  [Replaceable] readonly attribute WindowProxy self;
  [Unforgeable] readonly attribute Document document;
           attribute DOMString name;
  [PutForwards=href, Unforgeable] readonly attribute Location location;
  readonly attribute History history;

  boolean find(optional DOMString aString, optional boolean aCaseSensitive, optional boolean aBackwards, optional boolean aWrapAround, optional boolean aWholeWord, optional boolean aSearchInFrames, optional boolean aShowDialog);

  [Replaceable] readonly attribute BarProp locationbar;
  [Replaceable] readonly attribute BarProp menubar;
  [Replaceable] readonly attribute BarProp personalbar;
  [Replaceable] readonly attribute BarProp scrollbars;
  [Replaceable] readonly attribute BarProp statusbar;
  [Replaceable] readonly attribute BarProp toolbar;
           attribute DOMString status;
  void close();
  void stop();
  void focus();
  void blur();

  // other browsing contexts
  [Replaceable] readonly attribute WindowProxy frames;
  [Replaceable] readonly attribute unsigned long length;
  [Unforgeable] readonly attribute WindowProxy top;
           attribute WindowProxy opener;
  readonly attribute WindowProxy parent;
  readonly attribute Element? frameElement;
  WindowProxy open(optional DOMString url, optional DOMString target, optional DOMString features, optional boolean replace);
  getter WindowProxy (unsigned long index);
  getter object (DOMString name);

  // the user agent
  readonly attribute Navigator navigator;
  readonly attribute External external;
  readonly attribute ApplicationCache applicationCache;

  // user prompts
  void alert(DOMString message);
  boolean confirm(DOMString message);
  DOMString? prompt(DOMString message, optional DOMString default);
  void print();
  any showModalDialog(DOMString url, optional any argument);

  // cross-document messaging
  void postMessage(any message, DOMString targetOrigin, optional sequence<Transferable> transfer);

  // event handler IDL attributes
  [TreatNonCallableAsNull] attribute Function? onabort;
  [TreatNonCallableAsNull] attribute Function? onafterprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeunload;
  [TreatNonCallableAsNull] attribute Function? onblur;
  [TreatNonCallableAsNull] attribute Function? oncanplay;
  [TreatNonCallableAsNull] attribute Function? oncanplaythrough;
  [TreatNonCallableAsNull] attribute Function? onchange;
  [TreatNonCallableAsNull] attribute Function? onclick;
  [TreatNonCallableAsNull] attribute Function? oncontextmenu;
  [TreatNonCallableAsNull] attribute Function? oncuechange;
  [TreatNonCallableAsNull] attribute Function? ondblclick;
  [TreatNonCallableAsNull] attribute Function? ondrag;
  [TreatNonCallableAsNull] attribute Function? ondragend;
  [TreatNonCallableAsNull] attribute Function? ondragenter;
  [TreatNonCallableAsNull] attribute Function? ondragleave;
  [TreatNonCallableAsNull] attribute Function? ondragover;
  [TreatNonCallableAsNull] attribute Function? ondragstart;
  [TreatNonCallableAsNull] attribute Function? ondrop;
  [TreatNonCallableAsNull] attribute Function? ondurationchange;
  [TreatNonCallableAsNull] attribute Function? onemptied;
  [TreatNonCallableAsNull] attribute Function? onended;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onfocus;
  [TreatNonCallableAsNull] attribute Function? onhashchange;
  [TreatNonCallableAsNull] attribute Function? oninput;
  [TreatNonCallableAsNull] attribute Function? oninvalid;
  [TreatNonCallableAsNull] attribute Function? onkeydown;
  [TreatNonCallableAsNull] attribute Function? onkeypress;
  [TreatNonCallableAsNull] attribute Function? onkeyup;
  [TreatNonCallableAsNull] attribute Function? onload;
  [TreatNonCallableAsNull] attribute Function? onloadeddata;
  [TreatNonCallableAsNull] attribute Function? onloadedmetadata;
  [TreatNonCallableAsNull] attribute Function? onloadstart;
  [TreatNonCallableAsNull] attribute Function? onmessage;
  [TreatNonCallableAsNull] attribute Function? onmousedown;
  [TreatNonCallableAsNull] attribute Function? onmousemove;
  [TreatNonCallableAsNull] attribute Function? onmouseout;
  [TreatNonCallableAsNull] attribute Function? onmouseover;
  [TreatNonCallableAsNull] attribute Function? onmouseup;
  [TreatNonCallableAsNull] attribute Function? onmousewheel;
  [TreatNonCallableAsNull] attribute Function? onoffline;
  [TreatNonCallableAsNull] attribute Function? ononline;
  [TreatNonCallableAsNull] attribute Function? onpause;
  [TreatNonCallableAsNull] attribute Function? onplay;
  [TreatNonCallableAsNull] attribute Function? onplaying;
  [TreatNonCallableAsNull] attribute Function? onpagehide;
  [TreatNonCallableAsNull] attribute Function? onpageshow;
  [TreatNonCallableAsNull] attribute Function? onpopstate;
  [TreatNonCallableAsNull] attribute Function? onprogress;
  [TreatNonCallableAsNull] attribute Function? onratechange;
  [TreatNonCallableAsNull] attribute Function? onreset;
  [TreatNonCallableAsNull] attribute Function? onresize;
  [TreatNonCallableAsNull] attribute Function? onscroll;
  [TreatNonCallableAsNull] attribute Function? onseeked;
  [TreatNonCallableAsNull] attribute Function? onseeking;
  [TreatNonCallableAsNull] attribute Function? onselect;
  [TreatNonCallableAsNull] attribute Function? onshow;
  [TreatNonCallableAsNull] attribute Function? onstalled;
  [TreatNonCallableAsNull] attribute Function? onstorage;
  [TreatNonCallableAsNull] attribute Function? onsubmit;
  [TreatNonCallableAsNull] attribute Function? onsuspend;
  [TreatNonCallableAsNull] attribute Function? ontimeupdate;
  [TreatNonCallableAsNull] attribute Function? onunload;
  [TreatNonCallableAsNull] attribute Function? onvolumechange;
  [TreatNonCallableAsNull] attribute Function? onwaiting;
};

interface BarProp {
           attribute boolean visible;
};

interface History {
  readonly attribute long length;
  readonly attribute any state;
  void go(optional long delta);
  void back();
  void forward();
  void pushState(any data, DOMString title, optional DOMString url);
  void replaceState(any data, DOMString title, optional DOMString url);
};

interface Location {
  stringifier attribute DOMString href;
  void assign(DOMString url);
  void replace(DOMString url);
  void reload();

  // URL decomposition IDL attributes
           attribute DOMString protocol;
           attribute DOMString host;
           attribute DOMString hostname;
           attribute DOMString port;
           attribute DOMString pathname;
           attribute DOMString search;
           attribute DOMString hash;
};

[Constructor(DOMString type, optional PopStateEventInit eventInitDict)]
interface PopStateEvent : Event {
  readonly attribute any state;
};

dictionary PopStateEventInit : EventInit {
  any state;
};

[Constructor(DOMString type, optional HashChangeEventInit eventInitDict)]
interface HashChangeEvent : Event {
  readonly attribute DOMString oldURL;
  readonly attribute DOMString newURL;
};

dictionary HashChangeEventInit : EventInit {
  DOMString oldURL;
  DOMString newURL;
};

[Constructor(DOMString type, optional PageTransitionEventInit eventInitDict)]
interface PageTransitionEvent : Event {
  readonly attribute boolean persisted;
};

dictionary PageTransitionEventInit : EventInit {
  boolean persisted;
};

interface BeforeUnloadEvent : Event {
           attribute DOMString returnValue;
};

interface ApplicationCache : EventTarget {

  // update status
  const unsigned short UNCACHED = 0;
  const unsigned short IDLE = 1;
  const unsigned short CHECKING = 2;
  const unsigned short DOWNLOADING = 3;
  const unsigned short UPDATEREADY = 4;
  const unsigned short OBSOLETE = 5;
  readonly attribute unsigned short status;

  // updates
  void update();
  void abort();
  void swapCache();

  // events
  [TreatNonCallableAsNull] attribute Function? onchecking;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onnoupdate;
  [TreatNonCallableAsNull] attribute Function? ondownloading;
  [TreatNonCallableAsNull] attribute Function? onprogress;
  [TreatNonCallableAsNull] attribute Function? onupdateready;
  [TreatNonCallableAsNull] attribute Function? oncached;
  [TreatNonCallableAsNull] attribute Function? onobsolete;
};

[NoInterfaceObject]
interface NavigatorOnLine {
  readonly attribute boolean onLine;
};

[Callback=FunctionOnly, NoInterfaceObject]
interface Function {
  any call(any... arguments);
};

[NoInterfaceObject]
interface WindowBase64 {
  DOMString btoa(DOMString btoa);
  DOMString atob(DOMString atob);
};
Window implements WindowBase64;

[NoInterfaceObject]
interface WindowTimers {
  long setTimeout(Function handler, optional long timeout, any... args);
  long setTimeout([AllowAny] DOMString handler, optional long timeout, any... args);
  void clearTimeout(long handle);
  long setInterval(Function handler, optional long timeout, any... args);
  long setInterval([AllowAny] DOMString handler, optional long timeout, any... args);
  void clearInterval(long handle);
};
Window implements WindowTimers;

[NoInterfaceObject] interface WindowModal {
  readonly attribute any dialogArguments;
           attribute DOMString returnValue;
};

interface Navigator {
  // objects implementing this interface also implement the interfaces given below
};
Navigator implements NavigatorID;
Navigator implements NavigatorOnLine;
Navigator implements NavigatorContentUtils;
Navigator implements NavigatorStorageUtils;

[NoInterfaceObject]
interface NavigatorID {
  readonly attribute DOMString appName;
  readonly attribute DOMString appVersion;
  readonly attribute DOMString platform;
  readonly attribute DOMString userAgent;
};

[NoInterfaceObject]
interface NavigatorContentUtils {
  // content handler registration
  void registerProtocolHandler(DOMString scheme, DOMString url, DOMString title);
  void registerContentHandler(DOMString mimeType, DOMString url, DOMString title);
  DOMString isProtocolHandlerRegistered(DOMString scheme, DOMString url);
  DOMString isContentHandlerRegistered(DOMString mimeType, DOMString url);
  void unregisterProtocolHandler(DOMString scheme, DOMString url);
  void unregisterContentHandler(DOMString mimeType, DOMString url);
};

[NoInterfaceObject]
interface NavigatorStorageUtils {
  void yieldForStorageUpdates();
};

interface External {
  void AddSearchProvider(DOMString engineURL);
  unsigned long IsSearchProviderInstalled(DOMString engineURL);
};

interface DataTransfer {
           attribute DOMString dropEffect;
           attribute DOMString effectAllowed;

  readonly attribute DataTransferItemList items;

  void setDragImage(Element image, long x, long y);
  void addElement(Element element);

  /* old interface */
  readonly attribute DOMStringList types;
  DOMString getData(DOMString format);
  void setData(DOMString format, DOMString data);
  void clearData(optional DOMString format);
  readonly attribute FileList files;
};

interface DataTransferItemList {
  readonly attribute unsigned long length;
  getter DataTransferItem (unsigned long index);
  deleter void (unsigned long index);
  void clear();

  DataTransferItem? add(DOMString data, DOMString type);
  DataTransferItem? add(File data);
};

interface DataTransferItem {
  readonly attribute DOMString kind;
  readonly attribute DOMString type;
  void getAsString(FunctionStringCallback? callback);
  File? getAsFile();
};

[Callback=FunctionOnly, NoInterfaceObject]
interface FunctionStringCallback {
  void handleEvent(DOMString data);
};

[Constructor(DOMString type, optional DragEventInit eventInitDict)]
interface DragEvent : MouseEvent {
  readonly attribute DataTransfer? dataTransfer;
};

dictionary DragEventInit : MouseEventInit {
  DataTransfer? dataTransfer;
};

[NoInterfaceObject]
interface NavigatorUserMedia {
  void getUserMedia(DOMString options, NavigatorUserMediaSuccessCallback? successCallback, optional NavigatorUserMediaErrorCallback? errorCallback);
};
Navigator implements NavigatorUserMedia;

[Callback=FunctionOnly, NoInterfaceObject]
interface NavigatorUserMediaSuccessCallback {
  void handleEvent(LocalMediaStream stream);
};

[NoInterfaceObject]
interface NavigatorUserMediaError {
  const unsigned short PERMISSION_DENIED = 1;
  readonly attribute unsigned short code;
};

[Callback=FunctionOnly, NoInterfaceObject]
interface NavigatorUserMediaErrorCallback {
  void handleEvent(NavigatorUserMediaError error);
};

[Constructor(MediaStream parentStream)]
interface MediaStream : EventTarget {
  readonly attribute DOMString label;
  readonly attribute MediaStreamTrack[] tracks;

  MediaStreamRecorder record();

  const unsigned short LIVE = 1;
  const unsigned short ENDED = 2;
  readonly attribute unsigned short readyState;
  [TreatNonCallableAsNull] attribute Function? onended;
};

interface LocalMediaStream : MediaStream {
  void stop();
};

interface MediaStreamTrack {
  readonly attribute DOMString kind;
  readonly attribute DOMString label;
           attribute boolean enabled;
};

interface MediaStreamRecorder {
  void getRecordedData(BlobCallback? callback);
};

[Callback=FunctionOnly, NoInterfaceObject]
interface BlobCallback {
  void handleEvent(Blob blob);
};

partial interface URL {
  static DOMString createObjectURL(MediaStream stream);
};

[Constructor(DOMString serverConfiguration, SignalingCallback signalingCallback)]
interface PeerConnection : EventTarget {
  void processSignalingMessage(DOMString message);

  const unsigned short NEW = 0;
  const unsigned short NEGOTIATING = 1;
  const unsigned short ACTIVE = 2;
  const unsigned short CLOSED = 3;
  readonly attribute unsigned short readyState;

  void send(DOMString text);
  void addStream(MediaStream stream);
  void removeStream(MediaStream stream);
  readonly attribute MediaStream[] localStreams;
  readonly attribute MediaStream[] remoteStreams;

  void close();

  // connection quality information
  [TreatNonCallableAsNull] attribute Function? onconnecting;
  [TreatNonCallableAsNull] attribute Function? onopen;
  [TreatNonCallableAsNull] attribute Function? onmessage;
  [TreatNonCallableAsNull] attribute Function? onaddstream;
  [TreatNonCallableAsNull] attribute Function? onremovestream;
};

[Callback=FunctionOnly, NoInterfaceObject]
interface SignalingCallback {
  void handleEvent(DOMString message, PeerConnection source);
};

[Constructor(DOMString type, optional MediaStreamEventInit eventInitDict)]
interface MediaStreamEvent : Event {
  readonly attribute MediaStream? stream;
};

dictionary MediaStreamEventInit : EventInit {
  // DOMString MediaStream? stream;
};

interface WorkerGlobalScope : EventTarget {
  readonly attribute WorkerGlobalScope self;
  readonly attribute WorkerLocation location;

  void close();
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onoffline;
  [TreatNonCallableAsNull] attribute Function? ononline;
};
WorkerGlobalScope implements WorkerUtils;

[Supplemental, NoInterfaceObject]
interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
  void postMessage(any message, optional sequence<Transferable> transfer);
  [TreatNonCallableAsNull] attribute Function? onmessage;
};

[Supplemental, NoInterfaceObject]
interface SharedWorkerGlobalScope : WorkerGlobalScope {
  readonly attribute DOMString name;
  readonly attribute ApplicationCache applicationCache;
  [TreatNonCallableAsNull] attribute Function? onconnect;
};

[Constructor(DOMString type, optional ErrorEventInit eventInitDict)]
interface ErrorEvent : Event {
  readonly attribute DOMString message;
  readonly attribute DOMString filename;
  readonly attribute unsigned long lineno;
};

dictionary ErrorEventInit : EventInit {
  DOMString message;
  DOMString filename;
  unsigned long lineno;
};

[Supplemental, NoInterfaceObject]
interface AbstractWorker : EventTarget {
  [TreatNonCallableAsNull] attribute Function? onerror;

};

[Constructor(DOMString scriptURL)]
interface Worker : AbstractWorker {
  void terminate();

  void postMessage(any message, optional sequence<Transferable> transfer);
  [TreatNonCallableAsNull] attribute Function? onmessage;
};

[Constructor(DOMString scriptURL, optional DOMString name)]
interface SharedWorker : AbstractWorker {
  readonly attribute MessagePort port;
};

[NoInterfaceObject]
interface WorkerUtils {
  void importScripts(DOMString... urls);
  readonly attribute WorkerNavigator navigator;
};
WorkerUtils implements WindowTimers;
WorkerUtils implements WindowBase64;

interface WorkerNavigator {};
WorkerNavigator implements NavigatorID;
WorkerNavigator implements NavigatorOnLine;

interface WorkerLocation {
  // URL decomposition IDL attributes
  stringifier readonly attribute DOMString href;
  readonly attribute DOMString protocol;
  readonly attribute DOMString host;
  readonly attribute DOMString hostname;
  readonly attribute DOMString port;
  readonly attribute DOMString pathname;
  readonly attribute DOMString search;
  readonly attribute DOMString hash;
};

[Constructor(DOMString type, optional MessageEventInit eventInitDict)]
interface MessageEvent : Event {
  readonly attribute any data;
  readonly attribute DOMString origin;
  readonly attribute DOMString lastEventId;
  readonly attribute WindowProxy? source;
  readonly attribute MessagePort[]? ports;
};

dictionary MessageEventInit : EventInit {
  any data;
  DOMString origin;
  DOMString lastEventId;
  WindowProxy? source;
  MessagePort[]? ports;
};

[Constructor(DOMString url, optional EventSourceInit eventSourceInitDict)]
interface EventSource : EventTarget {
  readonly attribute DOMString url;
  readonly attribute boolean withCredentials;

  // ready state
  const unsigned short CONNECTING = 0;
  const unsigned short OPEN = 1;
  const unsigned short CLOSED = 2;
  readonly attribute unsigned short readyState;

  // networking
  [TreatNonCallableAsNull] attribute Function? onopen;
  [TreatNonCallableAsNull] attribute Function? onmessage;
  [TreatNonCallableAsNull] attribute Function? onerror;
  void close();
};

dictionary EventSourceInit {
  boolean withCredentials = false;
};

[Constructor(DOMString url, optional DOMString protocols),
 Constructor(DOMString url, optional DOMString[] protocols)]
interface WebSocket : EventTarget {
  readonly attribute DOMString url;

  // ready state
  const unsigned short CONNECTING = 0;
  const unsigned short OPEN = 1;
  const unsigned short CLOSING = 2;
  const unsigned short CLOSED = 3;
  readonly attribute unsigned short readyState;
  readonly attribute unsigned long bufferedAmount;

  // networking
  [TreatNonCallableAsNull] attribute Function? onopen;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onclose;
  readonly attribute DOMString extensions;
  readonly attribute DOMString protocol;
  void close([Clamp] optional unsigned short code, optional DOMString reason);

  // messaging
  [TreatNonCallableAsNull] attribute Function? onmessage;
           attribute DOMString binaryType;
  void send(DOMString data);
  void send(ArrayBuffer data);
  void send(Blob data);
};

[Constructor(DOMString type, optional CloseEventInit eventInitDict)]
interface CloseEvent : Event {
  readonly attribute boolean wasClean;
  readonly attribute unsigned short code;
  readonly attribute DOMString reason;
};

dictionary CloseEventInit : EventInit {
  boolean wasClean;
  unsigned short code;
  DOMString reason;
};

[Constructor]
interface MessageChannel {
  readonly attribute MessagePort port1;
  readonly attribute MessagePort port2;
};

interface MessagePort : EventTarget {
  void postMessage(any message, optional sequence<Transferable> transfer);
  void start();
  void close();

  // event handlers
  [TreatNonCallableAsNull] attribute Function? onmessage;
};
MessagePort implements Transferable;

interface Storage {
  readonly attribute unsigned long length;
  DOMString? key(unsigned long index);
  getter DOMString getItem(DOMString key);
  setter creator void setItem(DOMString key, DOMString value);
  deleter void removeItem(DOMString key);
  void clear();
};

[NoInterfaceObject]
interface WindowSessionStorage {
  readonly attribute Storage sessionStorage;
};
Window implements WindowSessionStorage;

[NoInterfaceObject]
interface WindowLocalStorage {
  readonly attribute Storage localStorage;
};
Window implements WindowLocalStorage;

[Constructor(DOMString type, optional StorageEventInit eventInitDict)]
interface StorageEvent : Event {
  readonly attribute DOMString key;
  readonly attribute DOMString? oldValue;
  readonly attribute DOMString? newValue;
  readonly attribute DOMString url;
  readonly attribute Storage? storageArea;
};

dictionary StorageEventInit : EventInit {
  DOMString key;
  DOMString? oldValue;
  DOMString? newValue;
  DOMString url;
  Storage? storageArea;
};

interface HTMLAppletElement : HTMLElement {
           attribute DOMString align;
           attribute DOMString alt;
           attribute DOMString archive;
           attribute DOMString code;
           attribute DOMString codeBase;
           attribute DOMString height;
           attribute unsigned long hspace;
           attribute DOMString name;
           attribute DOMString _object; // the underscore is not part of the identifier
           attribute unsigned long vspace;
           attribute DOMString width;
};

interface HTMLMarqueeElement : HTMLElement {
           attribute DOMString behavior;
           attribute DOMString bgColor;
           attribute DOMString direction;
           attribute DOMString height;
           attribute unsigned long hspace;
           attribute long loop;
           attribute unsigned long scrollAmount;
           attribute unsigned long scrollDelay;
           attribute boolean trueSpeed;
           attribute unsigned long vspace;
           attribute DOMString width;

  [TreatNonCallableAsNull] attribute Function? onbounce;
  [TreatNonCallableAsNull] attribute Function? onfinish;
  [TreatNonCallableAsNull] attribute Function? onstart;

  void start();
  void stop();
};

interface HTMLFrameSetElement : HTMLElement {
           attribute DOMString cols;
           attribute DOMString rows;
  [TreatNonCallableAsNull] attribute Function? onafterprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeprint;
  [TreatNonCallableAsNull] attribute Function? onbeforeunload;
  [TreatNonCallableAsNull] attribute Function? onblur;
  [TreatNonCallableAsNull] attribute Function? onerror;
  [TreatNonCallableAsNull] attribute Function? onfocus;
  [TreatNonCallableAsNull] attribute Function? onhashchange;
  [TreatNonCallableAsNull] attribute Function? onload;
  [TreatNonCallableAsNull] attribute Function? onmessage;
  [TreatNonCallableAsNull] attribute Function? onoffline;
  [TreatNonCallableAsNull] attribute Function? ononline;
  [TreatNonCallableAsNull] attribute Function? onpagehide;
  [TreatNonCallableAsNull] attribute Function? onpageshow;
  [TreatNonCallableAsNull] attribute Function? onpopstate;
  [TreatNonCallableAsNull] attribute Function? onresize;
  [TreatNonCallableAsNull] attribute Function? onscroll;
  [TreatNonCallableAsNull] attribute Function? onstorage;
  [TreatNonCallableAsNull] attribute Function? onunload;
};

interface HTMLFrameElement : HTMLElement {
           attribute DOMString name;
           attribute DOMString scrolling;
           attribute DOMString src;
           attribute DOMString frameBorder;
           attribute DOMString longDesc;
           attribute boolean noResize;
  readonly attribute Document? contentDocument;
  readonly attribute WindowProxy? contentWindow;

  [TreatNullAs=EmptyString] attribute DOMString marginHeight;
  [TreatNullAs=EmptyString] attribute DOMString marginWidth;
};

partial interface HTMLAnchorElement {
           attribute DOMString coords;
           attribute DOMString charset;
           attribute DOMString name;
           attribute DOMString rev;
           attribute DOMString shape;
};

partial interface HTMLAreaElement {
           attribute boolean noHref;
};

interface HTMLBaseFontElement : HTMLElement {
           attribute DOMString color;
           attribute DOMString face;
           attribute long size;
};

partial interface HTMLBodyElement {
  [TreatNullAs=EmptyString] attribute DOMString text;
  [TreatNullAs=EmptyString] attribute DOMString link;
  [TreatNullAs=EmptyString] attribute DOMString vLink;
  [TreatNullAs=EmptyString] attribute DOMString aLink;
  [TreatNullAs=EmptyString] attribute DOMString bgColor;
                            attribute DOMString background;
};

partial interface HTMLBRElement {
           attribute DOMString clear;
};

partial interface HTMLTableCaptionElement {
           attribute DOMString align;
};

partial interface HTMLTableColElement {
           attribute DOMString align;
           attribute DOMString ch;
           attribute DOMString chOff;
           attribute DOMString vAlign;
           attribute DOMString width;
};

interface HTMLDirectoryElement : HTMLElement {
           attribute boolean compact;
};

partial interface HTMLDivElement {
           attribute DOMString align;
};

partial interface HTMLDListElement {
           attribute boolean compact;
};

partial interface HTMLEmbedElement {
           attribute DOMString align;
           attribute DOMString name;
};

interface HTMLFontElement : HTMLElement {
  [TreatNullAs=EmptyString] attribute DOMString color;
                            attribute DOMString face;
                            attribute DOMString size;
};

partial interface HTMLHeadingElement {
           attribute DOMString align;
};

partial interface HTMLHRElement {
           attribute DOMString align;
           attribute DOMString color;
           attribute boolean noShade;
           attribute DOMString size;
           attribute DOMString width;
};

partial interface HTMLHtmlElement {
           attribute DOMString version;
};

partial interface HTMLIFrameElement {
           attribute DOMString align;
           attribute DOMString scrolling;
           attribute DOMString frameBorder;
           attribute DOMString longDesc;

  [TreatNullAs=EmptyString] attribute DOMString marginHeight;
  [TreatNullAs=EmptyString] attribute DOMString marginWidth;
};

partial interface HTMLImageElement {
           attribute DOMString name;
           attribute DOMString align;
           attribute unsigned long hspace;
           attribute unsigned long vspace;
           attribute DOMString longDesc;

  [TreatNullAs=EmptyString] attribute DOMString border;
};

partial interface HTMLInputElement {
           attribute DOMString align;
           attribute DOMString useMap;
};

partial interface HTMLLegendElement {
           attribute DOMString align;
};

partial interface HTMLLIElement {
           attribute DOMString type;
};

partial interface HTMLLinkElement {
           attribute DOMString charset;
           attribute DOMString rev;
           attribute DOMString target;
};

partial interface HTMLMenuElement {
           attribute boolean compact;
};

partial interface HTMLMetaElement {
           attribute DOMString scheme;
};

partial interface HTMLObjectElement {
           attribute DOMString align;
           attribute DOMString archive;
           attribute DOMString code;
           attribute boolean declare;
           attribute unsigned long hspace;
           attribute DOMString standby;
           attribute unsigned long vspace;
           attribute DOMString codeBase;
           attribute DOMString codeType;

  [TreatNullAs=EmptyString] attribute DOMString border;
};

partial interface HTMLOListElement {
           attribute boolean compact;
};

partial interface HTMLParagraphElement {
           attribute DOMString align;
};

partial interface HTMLParamElement {
           attribute DOMString type;
           attribute DOMString valueType;
};

partial interface HTMLPreElement {
           attribute long width;
};

partial interface HTMLScriptElement {
           attribute DOMString event;
           attribute DOMString htmlFor;
};

partial interface HTMLTableElement {
           attribute DOMString align;
           attribute DOMString frame;
           attribute DOMString rules;
           attribute DOMString summary;
           attribute DOMString width;

  [TreatNullAs=EmptyString] attribute DOMString bgColor;
  [TreatNullAs=EmptyString] attribute DOMString cellPadding;
  [TreatNullAs=EmptyString] attribute DOMString cellSpacing;
};

partial interface HTMLTableSectionElement {
           attribute DOMString align;
           attribute DOMString ch;
           attribute DOMString chOff;
           attribute DOMString vAlign;
};

partial interface HTMLTableCellElement {
           attribute DOMString abbr;
           attribute DOMString align;
           attribute DOMString axis;
           attribute DOMString height;
           attribute DOMString width;

           attribute DOMString ch;
           attribute DOMString chOff;
           attribute boolean noWrap;
           attribute DOMString vAlign;

  [TreatNullAs=EmptyString] attribute DOMString bgColor;
};

partial interface HTMLTableRowElement {
           attribute DOMString align;
           attribute DOMString ch;
           attribute DOMString chOff;
           attribute DOMString vAlign;

  [TreatNullAs=EmptyString] attribute DOMString bgColor;
};

partial interface HTMLUListElement {
           attribute boolean compact;
           attribute DOMString type;
};

partial interface Document {
  [TreatNullAs=EmptyString] attribute DOMString fgColor;
  [TreatNullAs=EmptyString] attribute DOMString linkColor;
  [TreatNullAs=EmptyString] attribute DOMString vlinkColor;
  [TreatNullAs=EmptyString] attribute DOMString alinkColor;
  [TreatNullAs=EmptyString] attribute DOMString bgColor;

  readonly attribute HTMLCollection anchors;
  readonly attribute HTMLCollection applets;

  void clear();

  readonly attribute HTMLAllCollection all;
};