[LegacyUnenumerableNamedProperties]
interface HTMLAllCollection {
  readonly attribute unsigned long length;
  getter Element? (unsigned long index);
  getter (HTMLCollection or Element)? namedItem(DOMString name);
  legacycaller (HTMLCollection or Element)? item(optional DOMString nameOrItem);
};


interface HTMLFormControlsCollection : HTMLCollection {
  // inherits length and item()
  getter (RadioNodeList or Element)? namedItem(DOMString name); // shadows inherited namedItem()
};


interface RadioNodeList : NodeList {
  attribute DOMString value;
};


interface HTMLOptionsCollection : HTMLCollection {
  // inherits item(), namedItem()
  attribute unsigned long length; // shadows inherited length
  setter void (unsigned long index, HTMLOptionElement? option);
  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
  void remove(long index);
  attribute long selectedIndex;
};


[OverrideBuiltins]
interface DOMStringMap {
  getter DOMString (DOMString name);
  setter void (DOMString name, DOMString value);
  deleter void (DOMString name);
};


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


enum DocumentReadyState { "loading", "interactive", "complete" };

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

  // DOM tree accessors
  getter object (DOMString name);
  attribute DOMString title;
  attribute DOMString dir;
  attribute HTMLElement? body;
  readonly attribute HTMLHeadElement? head;
  [SameObject] readonly attribute HTMLCollection images;
  [SameObject] readonly attribute HTMLCollection embeds;
  [SameObject] readonly attribute HTMLCollection plugins;
  [SameObject] readonly attribute HTMLCollection links;
  [SameObject] readonly attribute HTMLCollection forms;
  [SameObject] readonly attribute HTMLCollection scripts;
  NodeList getElementsByName(DOMString elementName);
  readonly attribute HTMLScriptElement? currentScript;

  // dynamic markup insertion
  Document open(optional DOMString type = "text/html", optional DOMString replace = "");
  WindowProxy open(DOMString url, DOMString name, DOMString features, optional boolean replace = false);
  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, optional boolean showUI = false, optional DOMString value = "");
  boolean queryCommandEnabled(DOMString commandId);
  boolean queryCommandIndeterm(DOMString commandId);
  boolean queryCommandState(DOMString commandId);
  boolean queryCommandSupported(DOMString commandId);
  DOMString queryCommandValue(DOMString commandId);

  // special event handler IDL attributes that only apply to Document objects
  [LenientThis] attribute EventHandler onreadystatechange;
};
Document implements GlobalEventHandlers;
Document implements DocumentAndElementEventHandlers;


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


interface HTMLElement : Element {
  // metadata attributes
  attribute DOMString title;
  attribute DOMString lang;
  attribute boolean translate;
  attribute DOMString dir;
  [SameObject] readonly attribute DOMStringMap dataset;

  // user interaction
  attribute boolean hidden;
  void click();
  attribute long tabIndex;
  void focus();
  void blur();
  attribute DOMString accessKey;
  attribute boolean draggable;
  [PutForwards=value] readonly attribute DOMTokenList dropzone;
  attribute HTMLMenuElement? contextMenu;
  attribute boolean spellcheck;
  void forceSpellCheck();
};
HTMLElement implements GlobalEventHandlers;
HTMLElement implements DocumentAndElementEventHandlers;
HTMLElement implements ElementContentEditable;


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 DOMString href;
  attribute DOMString? crossOrigin;
  attribute DOMString rel;
  attribute DOMString rev;
  [SameObject, PutForwards=value]readonly attribute DOMTokenList relList;
  attribute DOMString media;
  attribute DOMString hreflang;
  attribute DOMString type;
  [SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
};
HTMLLinkElement implements LinkStyle;


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


interface HTMLStyleElement : HTMLElement {
  attribute DOMString media;
  attribute DOMString nonce;
  attribute DOMString type;
};
HTMLStyleElement implements LinkStyle;


interface HTMLBodyElement : HTMLElement {
};
HTMLBodyElement implements WindowEventHandlers;


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 {
  attribute DOMString target;
  attribute DOMString download;
  attribute DOMString rel;
  attribute DOMString rev;
  [SameObject, PutForwards=value] readonly attribute DOMTokenList relList;
  attribute DOMString hreflang;
  attribute DOMString type;
  attribute DOMString text;
};
HTMLAnchorElement implements HTMLHyperlinkElementUtils;


interface HTMLDataElement : HTMLElement {
  attribute DOMString value;
};


interface HTMLTimeElement : HTMLElement {
  attribute DOMString dateTime;
};


interface HTMLSpanElement : HTMLElement {};


interface HTMLBRElement : HTMLElement {};


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


interface HTMLPictureElement : HTMLElement {};


partial interface HTMLSourceElement {
  attribute DOMString srcset;
  attribute DOMString sizes;
  attribute DOMString media;
};


[NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
interface HTMLImageElement : HTMLElement {
  attribute DOMString alt;
  attribute DOMString src;
  attribute DOMString srcset;
  attribute DOMString sizes;
  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;
  readonly attribute DOMString currentSrc;
};


interface HTMLIFrameElement : HTMLElement {
  attribute DOMString src;
  attribute DOMString srcdoc;
  attribute DOMString name;
  [PutForwards=value] readonly attribute DOMTokenList sandbox;
  attribute boolean allowFullscreen;
  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;
  legacycaller any (any... arguments);
};


interface HTMLObjectElement : HTMLElement {
  attribute DOMString data;
  attribute DOMString type;
  attribute boolean typeMustMatch;
  attribute DOMString name;
  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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  legacycaller any (any... arguments);
};


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(optional DOMString src)]
interface HTMLAudioElement : HTMLMediaElement {};


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


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;
};


enum CanPlayTypeResult { "" /* empty string */, "maybe", "probably" };


typedef (MediaStream or MediaSource or Blob) MediaProvider;


interface HTMLMediaElement : HTMLElement {

  // error state
  readonly attribute MediaError? error;

  // network state
  attribute DOMString src;
  attribute MediaProvider? srcObject;
  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();
  CanPlayTypeResult 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;
  void fastSeek(double time);
  readonly attribute unrestricted double duration;
  object getStartDate();
  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();

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

  // tracks
  [SameObject] readonly attribute AudioTrackList audioTracks;
  [SameObject] readonly attribute VideoTrackList videoTracks;
  [SameObject] readonly attribute TextTrackList textTracks;
  TextTrack addTextTrack(TextTrackKind 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 : EventTarget {
  readonly attribute unsigned long length;
  getter AudioTrack (unsigned long index);
  AudioTrack? getTrackById(DOMString id);

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};


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


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

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};


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


interface TextTrackList : EventTarget {
  readonly attribute unsigned long length;
  getter TextTrack (unsigned long index);
  TextTrack? getTrackById(DOMString id);

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};


enum TextTrackMode { "disabled",  "hidden",  "showing" };

enum TextTrackKind { "subtitles",  "captions",  "descriptions",  "chapters",  "metadata" };

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

  readonly attribute DOMString id;
  readonly attribute DOMString inBandMetadataTrackDispatchType;

  attribute TextTrackMode mode;

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

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

  attribute EventHandler oncuechange;
};


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


interface TextTrackCue : EventTarget {
  readonly attribute TextTrack? track;

  attribute DOMString id;
  attribute double startTime;
  attribute double endTime;
  attribute boolean pauseOnExit;

  attribute EventHandler onenter;
  attribute EventHandler onexit;
};


[Constructor(double startTime, double endTime, ArrayBuffer data)]
interface DataCue : TextTrackCue {
  attribute ArrayBuffer data;
};


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 (VideoTrack or AudioTrack or TextTrack)? track;
};

dictionary TrackEventInit : EventInit {
  (VideoTrack or AudioTrack or TextTrack)? track;
};


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


interface HTMLAreaElement : HTMLElement {
  attribute DOMString alt;
  attribute DOMString coords;
  attribute DOMString shape;
  attribute DOMString target;
  attribute DOMString download;
  attribute DOMString rel;
  readonly attribute DOMTokenList relList;
  attribute DOMString hreflang;
  attribute DOMString type;
};
HTMLAreaElement implements HTMLHyperlinkElementUtils;


[NoInterfaceObject]
interface HTMLHyperlinkElementUtils {
  stringifier attribute USVString href;
  readonly attribute USVString origin;
  attribute USVString protocol;
  attribute USVString username;
  attribute USVString password;
  attribute USVString host;
  attribute USVString hostname;
  attribute USVString port;
  attribute USVString pathname;
  attribute USVString search;
  attribute USVString hash;
};


interface HTMLTableElement : HTMLElement {
  attribute HTMLTableCaptionElement? caption;
  HTMLTableCaptionElement createCaption();
  void deleteCaption();
  attribute HTMLTableSectionElement? tHead;
  HTMLTableSectionElement createTHead();
  void deleteTHead();
  attribute HTMLTableSectionElement? tFoot;
  HTMLTableSectionElement createTFoot();
  void deleteTFoot();
  [SameObject] readonly attribute HTMLCollection tBodies;
  HTMLTableSectionElement createTBody();
  [SameObject] readonly attribute HTMLCollection rows;
  HTMLTableRowElement insertRow(optional long index = -1);
  void deleteRow(long index);
};


interface HTMLTableCaptionElement : HTMLElement {};


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


interface HTMLTableSectionElement : HTMLElement {
  [SameObject] readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index = -1);
  void deleteRow(long index);
};


interface HTMLTableRowElement : HTMLElement {
  readonly attribute long rowIndex;
  readonly attribute long sectionRowIndex;
  [SameObject] readonly attribute HTMLCollection cells;
  HTMLElement insertCell(optional long index = -1);
  void deleteCell(long index);
};


interface HTMLTableDataCellElement : HTMLTableCellElement {};


interface HTMLTableHeaderCellElement : HTMLTableCellElement {
  attribute DOMString scope;
  attribute DOMString abbr;
};


interface HTMLTableCellElement : HTMLElement {
  attribute unsigned long colSpan;
  attribute unsigned long rowSpan;
  [PutForwards=value] readonly attribute DOMTokenList 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;

  [SameObject] readonly attribute HTMLFormControlsCollection elements;
  readonly attribute unsigned long length;
  getter Element (unsigned long index);
  getter (RadioNodeList or Element) (DOMString name);

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


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;
  attribute DOMString inputMode;
  readonly attribute HTMLElement? list;
  attribute DOMString max;
  attribute long maxLength;
  attribute DOMString min;
  attribute long minLength;
  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;
  [TreatNullAs=EmptyString] attribute DOMString value;
  attribute object? valueAsDate;
  attribute unrestricted double valueAsNumber;
  attribute unsigned long width;

  void stepUp(optional long n = 1);
  void stepDown(optional long n = 1);

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

  [SameObject] readonly attribute NodeList labels;

  void select();
  attribute unsigned long selectionStart;
  attribute unsigned long selectionEnd;
  attribute DOMString selectionDirection;
  void setRangeText(DOMString replacement);
  void setRangeText(DOMString replacement, unsigned long start, unsigned long end, optional SelectionMode selectionMode = "preserve");
  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;
  attribute HTMLMenuElement? menu;

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

  [SameObject] readonly attribute NodeList labels;
};


interface HTMLSelectElement : HTMLElement {
  attribute DOMString autocomplete;
  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;

  [SameObject] readonly attribute HTMLOptionsCollection options;
  attribute unsigned long length;
  getter Element? item(unsigned long index);
  HTMLOptionElement? namedItem(DOMString name);
  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
  void remove(); // ChildNode overload
  void remove(long index);
  setter void (unsigned long index, HTMLOptionElement? option);

  [SameObject] readonly attribute HTMLCollection selectedOptions;
  attribute long selectedIndex;
  attribute DOMString value;

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

  [SameObject] readonly attribute NodeList labels;
};


interface HTMLDataListElement : HTMLElement {
  [SameObject] readonly attribute HTMLCollection options;
};


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


[NamedConstructor=Option(optional DOMString text = "", optional DOMString value, optional boolean defaultSelected = false, optional boolean selected = false)]
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 DOMString autocomplete;
  attribute boolean autofocus;
  attribute unsigned long cols;
  attribute DOMString dirName;
  attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
  attribute DOMString inputMode;
  attribute long maxLength;
  attribute long minLength;
  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;
  [TreatNullAs=EmptyString] attribute DOMString value;
  readonly attribute unsigned long textLength;

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

  [SameObject] readonly attribute NodeList labels;

  void select();
  attribute unsigned long selectionStart;
  attribute unsigned long selectionEnd;
  attribute DOMString selectionDirection;
  void setRangeText(DOMString replacement);
  void setRangeText(DOMString replacement, unsigned long start, unsigned long end, optional SelectionMode selectionMode = "preserve");
  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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  [SameObject] readonly attribute NodeList labels;
};


interface HTMLOutputElement : HTMLElement {
  [SameObject, PutForwards=value] readonly attribute DOMTokenList 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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  [SameObject] readonly attribute NodeList labels;
};


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


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

  readonly attribute DOMString type;

  [SameObject] readonly attribute HTMLCollection elements;

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


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


enum SelectionMode {
  "select",
  "start",
  "end",
  "preserve" // default
};


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


interface HTMLDetailsElement : HTMLElement {
  attribute boolean open;
};


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


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


[Constructor(DOMString type, optional RelatedEventInit eventInitDict)]
interface RelatedEvent : Event {
  readonly attribute EventTarget? relatedTarget;
};

dictionary RelatedEventInit : EventInit {
  EventTarget? relatedTarget;
};


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


interface HTMLTemplateElement : HTMLElement {
  readonly attribute DocumentFragment content;
};


typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;

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

  RenderingContext? getContext(DOMString contextId, any... arguments);
  boolean probablySupportsContext(DOMString contextId, any... arguments);

  DOMString toDataURL(optional DOMString type, any... arguments);
  void toBlob(BlobCallback _callback, optional DOMString type, any... arguments);
};

callback BlobCallback = void (Blob? blob);


[NoInterfaceObject]
interface ElementContentEditable {
  attribute DOMString contentEditable;
  readonly attribute boolean isContentEditable;
};


interface DataTransfer {
  attribute DOMString dropEffect;
  attribute DOMString effectAllowed;

  [SameObject] readonly attribute DataTransferItemList items;

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

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


interface DataTransferItemList {
  readonly attribute unsigned long length;
  getter DataTransferItem (unsigned long index);
  DataTransferItem? add(DOMString data, DOMString type);
  DataTransferItem? add(File data);
  void remove(unsigned long index);
  void clear();
};


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

callback FunctionStringCallback = void (DOMString data);


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

dictionary DragEventInit : MouseEventInit {
  DataTransfer? dataTransfer = null;
};


[PrimaryGlobal, LegacyUnenumerableNamedProperties]
/*sealed*/ 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;
[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();
readonly attribute boolean closed;
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 any opener;
[Replaceable] readonly attribute WindowProxy parent;
readonly attribute Element? frameElement;
WindowProxy open(optional DOMString url = "about:blank", optional DOMString target = "_blank", [TreatNullAs=EmptyString] optional DOMString features = "", optional boolean replace = false);
getter WindowProxy (unsigned long index);
getter object (DOMString name);

// the user agent
readonly attribute Navigator navigator;

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

unsigned long requestAnimationFrame(FrameRequestCallback callback);
void cancelAnimationFrame(unsigned long handle);
};
Window implements GlobalEventHandlers;
Window implements WindowEventHandlers;

callback FrameRequestCallback = void (DOMHighResTimeStamp time);


interface BarProp {
  readonly attribute boolean visible;
};


enum ScrollRestoration { "auto", "manual" };


interface History {
  readonly attribute unsigned long length;
  attribute ScrollRestoration scrollRestoration;
  readonly attribute any state;
  void go(optional long delta = 0);
  void back();
  void forward();
  void pushState(any data, DOMString title, optional DOMString? url = null);
  void replaceState(any data, DOMString title, optional DOMString? url = null);
};


[Unforgeable]
interface Location {
  stringifier attribute USVString href;
  readonly attribute USVString origin;
  attribute USVString protocol;
  attribute USVString host;
  attribute USVString hostname;
  attribute USVString port;
  attribute USVString pathname;
  attribute USVString search;
  attribute USVString hash;

  void assign(USVString url);
  void replace(USVString url);
  void reload();

  [SameObject] readonly attribute USVString[] ancestorOrigins;
};


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


dictionary PopStateEventInit : EventInit {
  any state;
};


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


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


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


dictionary PageTransitionEventInit : EventInit {
  boolean persisted;
};


interface BeforeUnloadEvent : Event {
  attribute DOMString returnValue;
};


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


[Constructor(DOMString type, optional ErrorEventInit eventInitDict), Exposed=(Window, Worker)]
interface ErrorEvent : Event {
  readonly attribute DOMString message;
  readonly attribute DOMString filename;
  readonly attribute unsigned long lineno;
  readonly attribute unsigned long colno;
  readonly attribute any error;
};


dictionary ErrorEventInit : EventInit {
  DOMString message = "";
  DOMString filename = "";
  unsigned long lineno = 0;
  unsigned long colno = 0;
  any error = null;
};


[Constructor(DOMString type, PromiseRejectionEventInit eventInitDict), Exposed=(Window,Worker)]
interface PromiseRejectionEvent : Event {
  readonly attribute Promise<any> promise;
  readonly attribute any reason;
};


dictionary PromiseRejectionEventInit : EventInit {
  required Promise<any> promise;
  any reason;
};


[TreatNonObjectAsNull]
callback EventHandlerNonNull = any (Event event);
typedef EventHandlerNonNull? EventHandler;


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


[TreatNonObjectAsNull]
callback OnBeforeUnloadEventHandlerNonNull = DOMString? (Event event);
typedef OnBeforeUnloadEventHandlerNonNull? OnBeforeUnloadEventHandler;


[NoInterfaceObject]
interface GlobalEventHandlers {
  attribute EventHandler onabort;
  attribute EventHandler onblur;
  attribute EventHandler oncancel;
  attribute EventHandler oncanplay;
  attribute EventHandler oncanplaythrough;
  attribute EventHandler onchange;
  attribute EventHandler onclick;
  attribute EventHandler onclose;
  attribute EventHandler oncontextmenu;
  attribute EventHandler oncuechange;
  attribute EventHandler ondblclick;
  attribute EventHandler ondrag;
  attribute EventHandler ondragend;
  attribute EventHandler ondragenter;
  attribute EventHandler ondragexit;
  attribute EventHandler ondragleave;
  attribute EventHandler ondragover;
  attribute EventHandler ondragstart;
  attribute EventHandler ondrop;
  attribute EventHandler ondurationchange;
  attribute EventHandler onemptied;
  attribute EventHandler onended;
  attribute OnErrorEventHandler onerror;
  attribute EventHandler onfocus;
  attribute EventHandler oninput;
  attribute EventHandler oninvalid;
  attribute EventHandler onkeydown;
  attribute EventHandler onkeypress;
  attribute EventHandler onkeyup;
  attribute EventHandler onload;
  attribute EventHandler onloadeddata;
  attribute EventHandler onloadedmetadata;
  attribute EventHandler onloadstart;
  attribute EventHandler onmousedown;
  [LenientThis] attribute EventHandler onmouseenter;
  [LenientThis] attribute EventHandler onmouseleave;
  attribute EventHandler onmousemove;
  attribute EventHandler onmouseout;
  attribute EventHandler onmouseover;
  attribute EventHandler onmouseup;
  attribute EventHandler onwheel;
  attribute EventHandler onpause;
  attribute EventHandler onplay;
  attribute EventHandler onplaying;
  attribute EventHandler onprogress;
  attribute EventHandler onratechange;
  attribute EventHandler onreset;
  attribute EventHandler onresize;
  attribute EventHandler onscroll;
  attribute EventHandler onseeked;
  attribute EventHandler onseeking;
  attribute EventHandler onselect;
  attribute EventHandler onshow;
  attribute EventHandler onstalled;
  attribute EventHandler onsubmit;
  attribute EventHandler onsuspend;
  attribute EventHandler ontimeupdate;
  attribute EventHandler ontoggle;
  attribute EventHandler onvolumechange;
  attribute EventHandler onwaiting;
};


[NoInterfaceObject]
interface WindowEventHandlers {
  attribute EventHandler onafterprint;
  attribute EventHandler onbeforeprint;
  attribute OnBeforeUnloadEventHandler onbeforeunload;
  attribute EventHandler onhashchange;
  attribute EventHandler onlanguagechange;
  attribute EventHandler onmessage;
  attribute EventHandler onoffline;
  attribute EventHandler ononline;
  attribute EventHandler onpagehide;
  attribute EventHandler onpageshow;
  attribute EventHandler onrejectionhandled;
  attribute EventHandler onpopstate;
  attribute EventHandler onstorage;
  attribute EventHandler onunhandledrejection;
  attribute EventHandler onunload;
};


[NoInterfaceObject]
interface DocumentAndElementEventHandlers {
  attribute EventHandler oncopy;
  attribute EventHandler oncut;
  attribute EventHandler onpaste;
};


[NoInterfaceObject, Exposed=(Window, Worker)]
interface WindowBase64 {
  DOMString btoa(DOMString btoa);
  DOMString atob(DOMString atob);
};
Window implements WindowBase64;
WorkerGlobalScope implements WindowBase64;


[NoInterfaceObject, Exposed=(Window,Worker)]
interface WindowTimers {
  long setTimeout((Function or DOMString) handler, optional long timeout = 0, any... arguments);
  void clearTimeout(optional long handle = 0);
  long setInterval((Function or DOMString) handler, optional long timeout = 0, any... arguments);
  void clearInterval(optional long handle = 0);
};
Window implements WindowTimers;
WorkerGlobalScope implements WindowTimers;


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


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


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


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


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


[NoInterfaceObject]
interface NavigatorCookies {
  readonly attribute boolean cookieEnabled;
};


[NoInterfaceObject]
  interface NavigatorPlugins {
  [SameObject] readonly attribute PluginArray plugins;
  [SameObject] readonly attribute MimeTypeArray mimeTypes;
  boolean javaEnabled();
};


interface PluginArray {
  void refresh(optional boolean reload = false);
  readonly attribute unsigned long length;
  getter Plugin? item(unsigned long index);
  getter Plugin? namedItem(DOMString name);
};


interface MimeTypeArray {
  readonly attribute unsigned long length;
  getter MimeType? item(unsigned long index);
  getter MimeType? namedItem(DOMString name);
};


interface Plugin {
  readonly attribute DOMString name;
  readonly attribute DOMString description;
  readonly attribute DOMString filename;
  readonly attribute unsigned long length;
  getter MimeType? item(unsigned long index);
  getter MimeType? namedItem(DOMString name);
};


interface MimeType {
  readonly attribute DOMString type;
  readonly attribute DOMString description;
  readonly attribute DOMString suffixes; // comma-separated
  readonly attribute Plugin enabledPlugin;
};


[Exposed=(Window, Worker)]
interface ImageBitmap {
  readonly attribute unsigned long width;
  readonly attribute unsigned long height;
};

typedef (HTMLImageElement or
        HTMLVideoElement or
        HTMLCanvasElement or
        Blob or
        ImageData or
        CanvasRenderingContext2D or
        ImageBitmap) ImageBitmapSource;


[NoInterfaceObject, Exposed=(Window, Worker)]
interface ImageBitmapFactories {
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image);
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image, long sx, long sy, long sw, long sh);
};
Window implements ImageBitmapFactories;
WorkerGlobalScope implements ImageBitmapFactories;


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;

  attribute EventHandler onbounce;
  attribute EventHandler onfinish;
  attribute EventHandler onstart;

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


interface HTMLFrameSetElement : HTMLElement {
  attribute DOMString cols;
  attribute DOMString rows;
};
HTMLFrameSetElement implements WindowEventHandlers;


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

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


[Exposed=(Window, SharedWorker)]
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
  attribute EventHandler onchecking;
  attribute EventHandler onerror;
  attribute EventHandler onnoupdate;
  attribute EventHandler ondownloading;
  attribute EventHandler onprogress;
  attribute EventHandler onupdateready;
  attribute EventHandler oncached;
  attribute EventHandler onobsolete;
};


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


partial interface HTMLAreaElement {
  attribute boolean noHref;
};


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;

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


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

  [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 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;
  attribute DOMString useMap;

  [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 border;
  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 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 HTMLTableDataCellElement {
  attribute DOMString abbr;
};


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;

  [SameObject] readonly attribute HTMLCollection anchors;
  [SameObject] readonly attribute HTMLCollection applets;

  void clear();
  void captureEvents();
  void releaseEvents();

  [SameObject] readonly attribute HTMLAllCollection all;
};


partial interface Window {
  void captureEvents();
  void releaseEvents();

  [Replaceable, SameObject] readonly attribute External external;
};


[NoInterfaceObject]
interface External {
  void AddSearchProvider();
  void IsSearchProviderInstalled();
};


[LegacyUnenumerableNamedProperties]
interface HTMLAllCollection {
  readonly attribute unsigned long length;
  getter Element? (unsigned long index);
  getter (HTMLCollection or Element)? namedItem(DOMString name);
  legacycaller (HTMLCollection or Element)? item(optional DOMString nameOrItem);
};

interface HTMLFormControlsCollection : HTMLCollection {
  // inherits length and item()
  getter (RadioNodeList or Element)? namedItem(DOMString name); // shadows inherited namedItem()
};

interface RadioNodeList : NodeList {
  attribute DOMString value;
};

interface HTMLOptionsCollection : HTMLCollection {
  // inherits item(), namedItem()
  attribute unsigned long length; // shadows inherited length
  setter void (unsigned long index, HTMLOptionElement? option);
  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
  void remove(long index);
  attribute long selectedIndex;
};

[OverrideBuiltins]
interface DOMStringMap {
  getter DOMString (DOMString name);
  setter void (DOMString name, DOMString value);
  deleter void (DOMString name);
};

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

enum DocumentReadyState { "loading", "interactive", "complete" };

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

  // DOM tree accessors
  getter object (DOMString name);
  attribute DOMString title;
  attribute DOMString dir;
  attribute HTMLElement? body;
  readonly attribute HTMLHeadElement? head;
  [SameObject] readonly attribute HTMLCollection images;
  [SameObject] readonly attribute HTMLCollection embeds;
  [SameObject] readonly attribute HTMLCollection plugins;
  [SameObject] readonly attribute HTMLCollection links;
  [SameObject] readonly attribute HTMLCollection forms;
  [SameObject] readonly attribute HTMLCollection scripts;
  NodeList getElementsByName(DOMString elementName);
  readonly attribute HTMLScriptElement? currentScript;

  // dynamic markup insertion
  Document open(optional DOMString type = "text/html", optional DOMString replace = "");
  WindowProxy open(DOMString url, DOMString name, DOMString features, optional boolean replace = false);
  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, optional boolean showUI = false, optional DOMString value = "");
  boolean queryCommandEnabled(DOMString commandId);
  boolean queryCommandIndeterm(DOMString commandId);
  boolean queryCommandState(DOMString commandId);
  boolean queryCommandSupported(DOMString commandId);
  DOMString queryCommandValue(DOMString commandId);

  // special event handler IDL attributes that only apply to Document objects
  [LenientThis] attribute EventHandler onreadystatechange;
};
Document implements GlobalEventHandlers;
Document implements DocumentAndElementEventHandlers;

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

interface HTMLElement : Element {
  // metadata attributes
  attribute DOMString title;
  attribute DOMString lang;
  attribute boolean translate;
  attribute DOMString dir;
  [SameObject] readonly attribute DOMStringMap dataset;

  // user interaction
  attribute boolean hidden;
  void click();
  attribute long tabIndex;
  void focus();
  void blur();
  attribute DOMString accessKey;
  attribute boolean draggable;
  [PutForwards=value] readonly attribute DOMTokenList dropzone;
  attribute HTMLMenuElement? contextMenu;
  attribute boolean spellcheck;
  void forceSpellCheck();
};
HTMLElement implements GlobalEventHandlers;
HTMLElement implements DocumentAndElementEventHandlers;
HTMLElement implements ElementContentEditable;

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 DOMString href;
  attribute DOMString? crossOrigin;
  attribute DOMString rel;
  attribute DOMString rev;
  [SameObject, PutForwards=value]readonly attribute DOMTokenList relList;
  attribute DOMString media;
  attribute DOMString hreflang;
  attribute DOMString type;
  [SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
};
HTMLLinkElement implements LinkStyle;

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

interface HTMLStyleElement : HTMLElement {
  attribute DOMString media;
  attribute DOMString nonce;
  attribute DOMString type;
};
HTMLStyleElement implements LinkStyle;

interface HTMLBodyElement : HTMLElement {
};
HTMLBodyElement implements WindowEventHandlers;

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 {
  attribute DOMString target;
  attribute DOMString download;
  attribute DOMString rel;
  attribute DOMString rev;
  [SameObject, PutForwards=value] readonly attribute DOMTokenList relList;
  attribute DOMString hreflang;
  attribute DOMString type;
  attribute DOMString text;
};
HTMLAnchorElement implements HTMLHyperlinkElementUtils;

interface HTMLDataElement : HTMLElement {
  attribute DOMString value;
};

interface HTMLTimeElement : HTMLElement {
  attribute DOMString dateTime;
};

interface HTMLSpanElement : HTMLElement {};

interface HTMLBRElement : HTMLElement {};

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

interface HTMLPictureElement : HTMLElement {};

partial interface HTMLSourceElement {
  attribute DOMString srcset;
  attribute DOMString sizes;
  attribute DOMString media;
};

[NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
interface HTMLImageElement : HTMLElement {
  attribute DOMString alt;
  attribute DOMString src;
  attribute DOMString srcset;
  attribute DOMString sizes;
  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;
  readonly attribute DOMString currentSrc;
};

interface HTMLIFrameElement : HTMLElement {
  attribute DOMString src;
  attribute DOMString srcdoc;
  attribute DOMString name;
  [PutForwards=value] readonly attribute DOMTokenList sandbox;
  attribute boolean allowFullscreen;
  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;
  legacycaller any (any... arguments);
};

interface HTMLObjectElement : HTMLElement {
  attribute DOMString data;
  attribute DOMString type;
  attribute boolean typeMustMatch;
  attribute DOMString name;
  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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  legacycaller any (any... arguments);
};

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(optional DOMString src)]
interface HTMLAudioElement : HTMLMediaElement {};

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

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;
};

enum CanPlayTypeResult { "" /* empty string */, "maybe", "probably" };

typedef (MediaStream or MediaSource or Blob) MediaProvider;

interface HTMLMediaElement : HTMLElement {

  // error state
  readonly attribute MediaError? error;

  // network state
  attribute DOMString src;
  attribute MediaProvider? srcObject;
  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();
  CanPlayTypeResult 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;
  void fastSeek(double time);
  readonly attribute unrestricted double duration;
  object getStartDate();
  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();

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

  // tracks
  [SameObject] readonly attribute AudioTrackList audioTracks;
  [SameObject] readonly attribute VideoTrackList videoTracks;
  [SameObject] readonly attribute TextTrackList textTracks;
  TextTrack addTextTrack(TextTrackKind 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 : EventTarget {
  readonly attribute unsigned long length;
  getter AudioTrack (unsigned long index);
  AudioTrack? getTrackById(DOMString id);

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};

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

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

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};

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

interface TextTrackList : EventTarget {
  readonly attribute unsigned long length;
  getter TextTrack (unsigned long index);
  TextTrack? getTrackById(DOMString id);

  attribute EventHandler onchange;
  attribute EventHandler onaddtrack;
  attribute EventHandler onremovetrack;
};

enum TextTrackMode { "disabled",  "hidden",  "showing" };

enum TextTrackKind { "subtitles",  "captions",  "descriptions",  "chapters",  "metadata" };

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

  readonly attribute DOMString id;
  readonly attribute DOMString inBandMetadataTrackDispatchType;

  attribute TextTrackMode mode;

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

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

  attribute EventHandler oncuechange;
};

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

interface TextTrackCue : EventTarget {
  readonly attribute TextTrack? track;

  attribute DOMString id;
  attribute double startTime;
  attribute double endTime;
  attribute boolean pauseOnExit;

  attribute EventHandler onenter;
  attribute EventHandler onexit;
};

[Constructor(double startTime, double endTime, ArrayBuffer data)]
interface DataCue : TextTrackCue {
  attribute ArrayBuffer data;
};

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 (VideoTrack or AudioTrack or TextTrack)? track;
};

dictionary TrackEventInit : EventInit {
  (VideoTrack or AudioTrack or TextTrack)? track;
};

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

interface HTMLAreaElement : HTMLElement {
  attribute DOMString alt;
  attribute DOMString coords;
  attribute DOMString shape;
  attribute DOMString target;
  attribute DOMString download;
  attribute DOMString rel;
  readonly attribute DOMTokenList relList;
  attribute DOMString hreflang;
  attribute DOMString type;
};
HTMLAreaElement implements HTMLHyperlinkElementUtils;

[NoInterfaceObject]
interface HTMLHyperlinkElementUtils {
  stringifier attribute USVString href;
  readonly attribute USVString origin;
  attribute USVString protocol;
  attribute USVString username;
  attribute USVString password;
  attribute USVString host;
  attribute USVString hostname;
  attribute USVString port;
  attribute USVString pathname;
  attribute USVString search;
  attribute USVString hash;
};

interface HTMLTableElement : HTMLElement {
  attribute HTMLTableCaptionElement? caption;
  HTMLTableCaptionElement createCaption();
  void deleteCaption();
  attribute HTMLTableSectionElement? tHead;
  HTMLTableSectionElement createTHead();
  void deleteTHead();
  attribute HTMLTableSectionElement? tFoot;
  HTMLTableSectionElement createTFoot();
  void deleteTFoot();
  [SameObject] readonly attribute HTMLCollection tBodies;
  HTMLTableSectionElement createTBody();
  [SameObject] readonly attribute HTMLCollection rows;
  HTMLTableRowElement insertRow(optional long index = -1);
  void deleteRow(long index);
};

interface HTMLTableCaptionElement : HTMLElement {};

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

interface HTMLTableSectionElement : HTMLElement {
  [SameObject] readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index = -1);
  void deleteRow(long index);
};

interface HTMLTableRowElement : HTMLElement {
  readonly attribute long rowIndex;
  readonly attribute long sectionRowIndex;
  [SameObject] readonly attribute HTMLCollection cells;
  HTMLElement insertCell(optional long index = -1);
  void deleteCell(long index);
};

interface HTMLTableDataCellElement : HTMLTableCellElement {};

interface HTMLTableHeaderCellElement : HTMLTableCellElement {
  attribute DOMString scope;
  attribute DOMString abbr;
};

interface HTMLTableCellElement : HTMLElement {
  attribute unsigned long colSpan;
  attribute unsigned long rowSpan;
  [PutForwards=value] readonly attribute DOMTokenList 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;

  [SameObject] readonly attribute HTMLFormControlsCollection elements;
  readonly attribute unsigned long length;
  getter Element (unsigned long index);
  getter (RadioNodeList or Element) (DOMString name);

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

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;
  attribute DOMString inputMode;
  readonly attribute HTMLElement? list;
  attribute DOMString max;
  attribute long maxLength;
  attribute DOMString min;
  attribute long minLength;
  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;
  [TreatNullAs=EmptyString] attribute DOMString value;
  attribute object? valueAsDate;
  attribute unrestricted double valueAsNumber;
  attribute unsigned long width;

  void stepUp(optional long n = 1);
  void stepDown(optional long n = 1);

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

  [SameObject] readonly attribute NodeList labels;

  void select();
  attribute unsigned long selectionStart;
  attribute unsigned long selectionEnd;
  attribute DOMString selectionDirection;
  void setRangeText(DOMString replacement);
  void setRangeText(DOMString replacement, unsigned long start, unsigned long end, optional SelectionMode selectionMode = "preserve");
  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;
  attribute HTMLMenuElement? menu;

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

  [SameObject] readonly attribute NodeList labels;
};

interface HTMLSelectElement : HTMLElement {
  attribute DOMString autocomplete;
  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;

  [SameObject] readonly attribute HTMLOptionsCollection options;
  attribute unsigned long length;
  getter Element? item(unsigned long index);
  HTMLOptionElement? namedItem(DOMString name);
  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
  void remove(); // ChildNode overload
  void remove(long index);
  setter void (unsigned long index, HTMLOptionElement? option);

  [SameObject] readonly attribute HTMLCollection selectedOptions;
  attribute long selectedIndex;
  attribute DOMString value;

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

  [SameObject] readonly attribute NodeList labels;
};

interface HTMLDataListElement : HTMLElement {
  [SameObject] readonly attribute HTMLCollection options;
};

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

[NamedConstructor=Option(optional DOMString text = "", optional DOMString value, optional boolean defaultSelected = false, optional boolean selected = false)]
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 DOMString autocomplete;
  attribute boolean autofocus;
  attribute unsigned long cols;
  attribute DOMString dirName;
  attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
  attribute DOMString inputMode;
  attribute long maxLength;
  attribute long minLength;
  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;
  [TreatNullAs=EmptyString] attribute DOMString value;
  readonly attribute unsigned long textLength;

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

  [SameObject] readonly attribute NodeList labels;

  void select();
  attribute unsigned long selectionStart;
  attribute unsigned long selectionEnd;
  attribute DOMString selectionDirection;
  void setRangeText(DOMString replacement);
  void setRangeText(DOMString replacement, unsigned long start, unsigned long end, optional SelectionMode selectionMode = "preserve");
  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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  [SameObject] readonly attribute NodeList labels;
};

interface HTMLOutputElement : HTMLElement {
  [SameObject, PutForwards=value] readonly attribute DOMTokenList 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();
  boolean reportValidity();
  void setCustomValidity(DOMString error);

  [SameObject] readonly attribute NodeList labels;
};

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

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

  readonly attribute DOMString type;

  [SameObject] readonly attribute HTMLCollection elements;

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

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

enum SelectionMode {
  "select",
  "start",
  "end",
  "preserve" // default
};

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

interface HTMLDetailsElement : HTMLElement {
  attribute boolean open;
};

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

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

[Constructor(DOMString type, optional RelatedEventInit eventInitDict)]
interface RelatedEvent : Event {
  readonly attribute EventTarget? relatedTarget;
};

dictionary RelatedEventInit : EventInit {
  EventTarget? relatedTarget;
};

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

interface HTMLTemplateElement : HTMLElement {
  readonly attribute DocumentFragment content;
};

typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;

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

  RenderingContext? getContext(DOMString contextId, any... arguments);
  boolean probablySupportsContext(DOMString contextId, any... arguments);

  DOMString toDataURL(optional DOMString type, any... arguments);
  void toBlob(BlobCallback _callback, optional DOMString type, any... arguments);
};

callback BlobCallback = void (Blob? blob);

[NoInterfaceObject]
interface ElementContentEditable {
  attribute DOMString contentEditable;
  readonly attribute boolean isContentEditable;
};

interface DataTransfer {
  attribute DOMString dropEffect;
  attribute DOMString effectAllowed;

  [SameObject] readonly attribute DataTransferItemList items;

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

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

interface DataTransferItemList {
  readonly attribute unsigned long length;
  getter DataTransferItem (unsigned long index);
  DataTransferItem? add(DOMString data, DOMString type);
  DataTransferItem? add(File data);
  void remove(unsigned long index);
  void clear();
};

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

callback FunctionStringCallback = void (DOMString data);

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

dictionary DragEventInit : MouseEventInit {
  DataTransfer? dataTransfer = null;
};

[PrimaryGlobal, LegacyUnenumerableNamedProperties]
/*sealed*/ 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;
[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();
readonly attribute boolean closed;
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 any opener;
[Replaceable] readonly attribute WindowProxy parent;
readonly attribute Element? frameElement;
WindowProxy open(optional DOMString url = "about:blank", optional DOMString target = "_blank", [TreatNullAs=EmptyString] optional DOMString features = "", optional boolean replace = false);
getter WindowProxy (unsigned long index);
getter object (DOMString name);

// the user agent
readonly attribute Navigator navigator;

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

unsigned long requestAnimationFrame(FrameRequestCallback callback);
void cancelAnimationFrame(unsigned long handle);
};
Window implements GlobalEventHandlers;
Window implements WindowEventHandlers;

callback FrameRequestCallback = void (DOMHighResTimeStamp time);

interface BarProp {
  readonly attribute boolean visible;
};

enum ScrollRestoration { "auto", "manual" };

interface History {
  readonly attribute unsigned long length;
  attribute ScrollRestoration scrollRestoration;
  readonly attribute any state;
  void go(optional long delta = 0);
  void back();
  void forward();
  void pushState(any data, DOMString title, optional DOMString? url = null);
  void replaceState(any data, DOMString title, optional DOMString? url = null);
};

[Unforgeable]
interface Location {
  stringifier attribute USVString href;
  readonly attribute USVString origin;
  attribute USVString protocol;
  attribute USVString host;
  attribute USVString hostname;
  attribute USVString port;
  attribute USVString pathname;
  attribute USVString search;
  attribute USVString hash;

  void assign(USVString url);
  void replace(USVString url);
  void reload();

  [SameObject] readonly attribute USVString[] ancestorOrigins;
};

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

dictionary PopStateEventInit : EventInit {
  any state;
};

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

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

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

dictionary PageTransitionEventInit : EventInit {
  boolean persisted;
};

interface BeforeUnloadEvent : Event {
  attribute DOMString returnValue;
};

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

[Constructor(DOMString type, optional ErrorEventInit eventInitDict), Exposed=(Window, Worker)]
interface ErrorEvent : Event {
  readonly attribute DOMString message;
  readonly attribute DOMString filename;
  readonly attribute unsigned long lineno;
  readonly attribute unsigned long colno;
  readonly attribute any error;
};

dictionary ErrorEventInit : EventInit {
  DOMString message = "";
  DOMString filename = "";
  unsigned long lineno = 0;
  unsigned long colno = 0;
  any error = null;
};

[Constructor(DOMString type, PromiseRejectionEventInit eventInitDict), Exposed=(Window,Worker)]
interface PromiseRejectionEvent : Event {
  readonly attribute Promise<any> promise;
  readonly attribute any reason;
};

dictionary PromiseRejectionEventInit : EventInit {
  required Promise<any> promise;
  any reason;
};

[TreatNonObjectAsNull]
callback EventHandlerNonNull = any (Event event);
typedef EventHandlerNonNull? EventHandler;

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

[TreatNonObjectAsNull]
callback OnBeforeUnloadEventHandlerNonNull = DOMString? (Event event);
typedef OnBeforeUnloadEventHandlerNonNull? OnBeforeUnloadEventHandler;

[NoInterfaceObject]
interface GlobalEventHandlers {
  attribute EventHandler onabort;
  attribute EventHandler onblur;
  attribute EventHandler oncancel;
  attribute EventHandler oncanplay;
  attribute EventHandler oncanplaythrough;
  attribute EventHandler onchange;
  attribute EventHandler onclick;
  attribute EventHandler onclose;
  attribute EventHandler oncontextmenu;
  attribute EventHandler oncuechange;
  attribute EventHandler ondblclick;
  attribute EventHandler ondrag;
  attribute EventHandler ondragend;
  attribute EventHandler ondragenter;
  attribute EventHandler ondragexit;
  attribute EventHandler ondragleave;
  attribute EventHandler ondragover;
  attribute EventHandler ondragstart;
  attribute EventHandler ondrop;
  attribute EventHandler ondurationchange;
  attribute EventHandler onemptied;
  attribute EventHandler onended;
  attribute OnErrorEventHandler onerror;
  attribute EventHandler onfocus;
  attribute EventHandler oninput;
  attribute EventHandler oninvalid;
  attribute EventHandler onkeydown;
  attribute EventHandler onkeypress;
  attribute EventHandler onkeyup;
  attribute EventHandler onload;
  attribute EventHandler onloadeddata;
  attribute EventHandler onloadedmetadata;
  attribute EventHandler onloadstart;
  attribute EventHandler onmousedown;
  [LenientThis] attribute EventHandler onmouseenter;
  [LenientThis] attribute EventHandler onmouseleave;
  attribute EventHandler onmousemove;
  attribute EventHandler onmouseout;
  attribute EventHandler onmouseover;
  attribute EventHandler onmouseup;
  attribute EventHandler onwheel;
  attribute EventHandler onpause;
  attribute EventHandler onplay;
  attribute EventHandler onplaying;
  attribute EventHandler onprogress;
  attribute EventHandler onratechange;
  attribute EventHandler onreset;
  attribute EventHandler onresize;
  attribute EventHandler onscroll;
  attribute EventHandler onseeked;
  attribute EventHandler onseeking;
  attribute EventHandler onselect;
  attribute EventHandler onshow;
  attribute EventHandler onstalled;
  attribute EventHandler onsubmit;
  attribute EventHandler onsuspend;
  attribute EventHandler ontimeupdate;
  attribute EventHandler ontoggle;
  attribute EventHandler onvolumechange;
  attribute EventHandler onwaiting;
};

[NoInterfaceObject]
interface WindowEventHandlers {
  attribute EventHandler onafterprint;
  attribute EventHandler onbeforeprint;
  attribute OnBeforeUnloadEventHandler onbeforeunload;
  attribute EventHandler onhashchange;
  attribute EventHandler onlanguagechange;
  attribute EventHandler onmessage;
  attribute EventHandler onoffline;
  attribute EventHandler ononline;
  attribute EventHandler onpagehide;
  attribute EventHandler onpageshow;
  attribute EventHandler onrejectionhandled;
  attribute EventHandler onpopstate;
  attribute EventHandler onstorage;
  attribute EventHandler onunhandledrejection;
  attribute EventHandler onunload;
};

[NoInterfaceObject]
interface DocumentAndElementEventHandlers {
  attribute EventHandler oncopy;
  attribute EventHandler oncut;
  attribute EventHandler onpaste;
};

[NoInterfaceObject, Exposed=(Window, Worker)]
interface WindowBase64 {
  DOMString btoa(DOMString btoa);
  DOMString atob(DOMString atob);
};
Window implements WindowBase64;
WorkerGlobalScope implements WindowBase64;

[NoInterfaceObject, Exposed=(Window,Worker)]
interface WindowTimers {
  long setTimeout((Function or DOMString) handler, optional long timeout = 0, any... arguments);
  void clearTimeout(optional long handle = 0);
  long setInterval((Function or DOMString) handler, optional long timeout = 0, any... arguments);
  void clearInterval(optional long handle = 0);
};
Window implements WindowTimers;
WorkerGlobalScope implements WindowTimers;

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

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

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

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

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

[NoInterfaceObject]
interface NavigatorCookies {
  readonly attribute boolean cookieEnabled;
};

[NoInterfaceObject]
  interface NavigatorPlugins {
  [SameObject] readonly attribute PluginArray plugins;
  [SameObject] readonly attribute MimeTypeArray mimeTypes;
  boolean javaEnabled();
};

interface PluginArray {
  void refresh(optional boolean reload = false);
  readonly attribute unsigned long length;
  getter Plugin? item(unsigned long index);
  getter Plugin? namedItem(DOMString name);
};

interface MimeTypeArray {
  readonly attribute unsigned long length;
  getter MimeType? item(unsigned long index);
  getter MimeType? namedItem(DOMString name);
};

interface Plugin {
  readonly attribute DOMString name;
  readonly attribute DOMString description;
  readonly attribute DOMString filename;
  readonly attribute unsigned long length;
  getter MimeType? item(unsigned long index);
  getter MimeType? namedItem(DOMString name);
};

interface MimeType {
  readonly attribute DOMString type;
  readonly attribute DOMString description;
  readonly attribute DOMString suffixes; // comma-separated
  readonly attribute Plugin enabledPlugin;
};

[Exposed=(Window, Worker)]
interface ImageBitmap {
  readonly attribute unsigned long width;
  readonly attribute unsigned long height;
};

typedef (HTMLImageElement or
        HTMLVideoElement or
        HTMLCanvasElement or
        Blob or
        ImageData or
        CanvasRenderingContext2D or
        ImageBitmap) ImageBitmapSource;

[NoInterfaceObject, Exposed=(Window, Worker)]
interface ImageBitmapFactories {
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image);
  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource image, long sx, long sy, long sw, long sh);
};
Window implements ImageBitmapFactories;
WorkerGlobalScope implements ImageBitmapFactories;

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;

  attribute EventHandler onbounce;
  attribute EventHandler onfinish;
  attribute EventHandler onstart;

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

interface HTMLFrameSetElement : HTMLElement {
  attribute DOMString cols;
  attribute DOMString rows;
};
HTMLFrameSetElement implements WindowEventHandlers;

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

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

[Exposed=(Window, SharedWorker)]
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
  attribute EventHandler onchecking;
  attribute EventHandler onerror;
  attribute EventHandler onnoupdate;
  attribute EventHandler ondownloading;
  attribute EventHandler onprogress;
  attribute EventHandler onupdateready;
  attribute EventHandler oncached;
  attribute EventHandler onobsolete;
};

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

partial interface HTMLAreaElement {
  attribute boolean noHref;
};

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;

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

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

  [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 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;
  attribute DOMString useMap;

  [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 border;
  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 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 HTMLTableDataCellElement {
  attribute DOMString abbr;
};

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;

  [SameObject] readonly attribute HTMLCollection anchors;
  [SameObject] readonly attribute HTMLCollection applets;

  void clear();
  void captureEvents();
  void releaseEvents();

  [SameObject] readonly attribute HTMLAllCollection all;
};

partial interface Window {
  void captureEvents();
  void releaseEvents();

  [Replaceable, SameObject] readonly attribute External external;
};

[NoInterfaceObject]
interface External {
  void AddSearchProvider();
  void IsSearchProviderInstalled();
};