interface HTMLHtmlElement : HTMLElement {
  // also has obsolete members
};
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;
  readonly attribute DOMTokenList relList;
  attribute DOMString media;
  attribute DOMString hreflang;
  attribute DOMString type;
  [PutForwards=value] readonly attribute DOMSettableTokenList sizes;

  // also has obsolete members
};
HTMLLinkElement implements LinkStyle;
interface HTMLMetaElement : HTMLElement {
  attribute DOMString name;
  attribute DOMString httpEquiv;
  attribute DOMString content;

  // also has obsolete members
};
interface HTMLStyleElement : HTMLElement {
  attribute DOMString media;
  attribute DOMString nonce;
  attribute DOMString type;
  attribute boolean scoped;
};
HTMLStyleElement implements LinkStyle;
interface HTMLBodyElement : HTMLElement {

  // also has obsolete members
};
HTMLBodyElement implements WindowEventHandlers;
interface HTMLHeadingElement : HTMLElement {
  // also has obsolete members
};
interface HTMLParagraphElement : HTMLElement {
  // also has obsolete members
};
interface HTMLHRElement : HTMLElement {
  // also has obsolete members
};
interface HTMLPreElement : HTMLElement {
  // also has obsolete members
};
interface HTMLQuoteElement : HTMLElement {
           attribute DOMString cite;
};
interface HTMLOListElement : HTMLElement {
  attribute boolean reversed;
  attribute long start;
  attribute DOMString type;

  // also has obsolete members
};
interface HTMLUListElement : HTMLElement {
  // also has obsolete members
};
interface HTMLLIElement : HTMLElement {
  attribute long value;

  // also has obsolete members
};
interface HTMLDListElement : HTMLElement {
  // also has obsolete members
};
interface HTMLDivElement : HTMLElement {
  // also has obsolete members
};
interface HTMLAnchorElement : HTMLElement {
  attribute DOMString target;
  attribute DOMString download;
  attribute DOMString rel;
  readonly attribute DOMTokenList relList;
  attribute DOMString hreflang;
  attribute DOMString type;

  attribute DOMString text;

  // also has obsolete members
};
HTMLAnchorElement implements HTMLHyperlinkElementUtils;
interface HTMLDataElement : HTMLElement {
  attribute DOMString value;
};
interface HTMLTimeElement : HTMLElement {
  attribute DOMString dateTime;
};
interface HTMLSpanElement : HTMLElement {};
interface HTMLBRElement : HTMLElement {
  // also has obsolete members
};
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;

  // also has obsolete members
};
interface HTMLIFrameElement : HTMLElement {
  attribute DOMString src;
  attribute DOMString srcdoc;
  attribute DOMString name;
  [PutForwards=value] readonly attribute DOMSettableTokenList sandbox;
  attribute boolean seamless;
  attribute boolean allowFullscreen;
  attribute DOMString width;
  attribute DOMString height;
  readonly attribute Document? contentDocument;
  readonly attribute WindowProxy? contentWindow;
  Document? getSVGDocument();

  // also has obsolete members
};
interface HTMLEmbedElement : HTMLElement {
  attribute DOMString src;
  attribute DOMString type;
  attribute DOMString width;
  attribute DOMString height;
  Document? getSVGDocument();
  legacycaller any (any... arguments);

  // also has obsolete members
};
interface HTMLObjectElement : HTMLElement {
  attribute DOMString data;
  attribute DOMString type;
  attribute boolean typeMustMatch;
  attribute DOMString name;
  attribute DOMString useMap;
  readonly attribute HTMLFormElement? form;
  attribute DOMString width;
  attribute DOMString height;
  readonly attribute Document? contentDocument;
  readonly attribute WindowProxy? contentWindow;
  Document? getSVGDocument();

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

  legacycaller any (any... arguments);

  // also has obsolete members
};
interface HTMLParamElement : HTMLElement {
  attribute DOMString name;
  attribute DOMString value;

  // also has obsolete members
};
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;

  // also has obsolete members
};
interface HTMLTrackElement : HTMLElement {
  attribute DOMString kind;
  attribute DOMString src;
  attribute DOMString srclang;
  attribute DOMString label;
  attribute boolean default;

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

  readonly attribute TextTrack track;
};
interface HTMLMapElement : HTMLElement {
  attribute DOMString name;
  readonly attribute HTMLCollection areas;
};
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;
  // hreflang and type are not reflected

  // also has obsolete members
};
HTMLAreaElement implements HTMLHyperlinkElementUtils;
interface HTMLTableElement : HTMLElement {
  attribute HTMLTableCaptionElement? caption;
  HTMLElement createCaption();
  void deleteCaption();
  attribute HTMLTableSectionElement? tHead;
  HTMLElement createTHead();
  void deleteTHead();
  attribute HTMLTableSectionElement? tFoot;
  HTMLElement createTFoot();
  void deleteTFoot();
  readonly attribute HTMLCollection tBodies;
  HTMLElement createTBody();
  readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index = -1);
  void deleteRow(long index);
  attribute boolean sortable;
  void stopSorting();

  // also has obsolete members
           attribute DOMString border;
};
interface HTMLTableCaptionElement : HTMLElement {
  // also has obsolete members
};
interface HTMLTableColElement : HTMLElement {
  attribute unsigned long span;

  // also has obsolete members
};
interface HTMLTableSectionElement : HTMLElement {
  readonly attribute HTMLCollection rows;
  HTMLElement insertRow(optional long index = -1);
  void deleteRow(long index);

  // also has obsolete members
};
interface HTMLTableRowElement : HTMLElement {
  readonly attribute long rowIndex;
  readonly attribute long sectionRowIndex;
  readonly attribute HTMLCollection cells;
  HTMLElement insertCell(optional long index = -1);
  void deleteCell(long index);

  // also has obsolete members
};
interface HTMLTableDataCellElement : HTMLTableCellElement {
  // also has obsolete members
};
interface HTMLTableHeaderCellElement : HTMLTableCellElement {
  attribute DOMString scope;
  attribute DOMString abbr;
  attribute DOMString sorted;
  void sort();
};
[OverrideBuiltins]
interface HTMLFormElement : HTMLElement {
  attribute DOMString acceptCharset;
  attribute DOMString action;
  attribute DOMString autocomplete;
  attribute DOMString enctype;
  attribute DOMString encoding;
  attribute DOMString method;
  attribute DOMString name;
  attribute boolean noValidate;
  attribute DOMString target;

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

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

  void requestAutocomplete();
};
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 Date? valueAsDate;
  attribute unrestricted double valueAsNumber;
  attribute double valueLow;
  attribute double valueHigh;
  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);

  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);

  // also has obsolete members
};
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);

  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;

  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);

  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);

  readonly attribute NodeList labels;
};
interface HTMLDataListElement : HTMLElement {
  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);

  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);

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

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

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

  readonly attribute NodeList labels;
};
interface HTMLProgressElement : HTMLElement {
  attribute double value;
  attribute double max;
  readonly attribute double position;
  readonly attribute NodeList labels;
};
interface HTMLMeterElement : HTMLElement {
  attribute double value;
  attribute double min;
  attribute double max;
  attribute double low;
  attribute double high;
  attribute double optimum;
  readonly attribute NodeList labels;
};
interface HTMLFieldSetElement : HTMLElement {
  attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
  attribute DOMString name;

  readonly attribute DOMString type;

  readonly attribute HTMLFormControlsCollection 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;

  // also has obsolete members
};
interface HTMLDetailsElement : HTMLElement {
  attribute boolean open;
};
interface HTMLMenuElement : HTMLElement {
  attribute DOMString type;
  attribute DOMString label;

  // also has obsolete members
};
interface HTMLMenuItemElement : HTMLElement {
  attribute DOMString type;
  attribute DOMString label;
  attribute DOMString icon;
  attribute boolean disabled;
  attribute boolean checked;
  attribute DOMString radiogroup;
  attribute boolean default;
  readonly attribute HTMLElement? command;
};
interface HTMLDialogElement : HTMLElement {
  attribute boolean open;
  attribute DOMString returnValue;
  void show(optional (MouseEvent or Element) anchor);
  void showModal(optional (MouseEvent or Element) anchor);
  void close(optional DOMString returnValue);
};
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;

  // also has obsolete members
};
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);

  void setContext(RenderingContext context);
  CanvasProxy transferControlToProxy();

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