All HTML Tags supported by a Browser

Question

Using JavaScript, is it possible to obtain a list of the tags that a browser supports?

Answer 1

You can get a decent idea of what is supported by introspection on the window.

Try this out:

props = Object.getOwnPropertyNames(window)
for (var idx in props) {
  if (props[idx].indexOf("HTML") == 0) {
    //do something here
    console.log(props[idx]);
  }  
}

This is in no way exhaustive as far as I know but it will tell you in most browsers what tags have a DOM object type.

Here is sample output by running this in my Chrome console:

HTMLUnknownElement
HTMLOptionsCollection
HTMLFormControlsCollection
HTMLAllCollection
HTMLCollection
HTMLUListElement
HTMLTitleElement
HTMLTextAreaElement
HTMLTemplateElement
HTMLTableSectionElement
HTMLTableRowElement
HTMLTableElement
HTMLTableColElement
HTMLTableCellElement
HTMLTableCaptionElement
HTMLStyleElement
HTMLSpanElement
HTMLSelectElement
HTMLScriptElement
HTMLQuoteElement
HTMLProgressElement
HTMLPreElement
HTMLParamElement
HTMLParagraphElement
HTMLOutputElement
HTMLOptionElement
HTMLOptGroupElement
HTMLObjectElement
HTMLOListElement
HTMLModElement
HTMLMeterElement
HTMLMetaElement
HTMLMenuElement
HTMLMarqueeElement
HTMLMapElement
HTMLLinkElement
HTMLLegendElement
HTMLLabelElement
HTMLLIElement
HTMLKeygenElement
HTMLInputElement
HTMLImageElement
HTMLIFrameElement
HTMLHtmlElement
HTMLHeadingElement
HTMLHeadElement
HTMLHRElement
HTMLFrameSetElement
HTMLFrameElement
HTMLFormElement
HTMLFontElement
HTMLFieldSetElement
HTMLEmbedElement
HTMLDivElement
HTMLDirectoryElement
HTMLDataListElement
HTMLDListElement
HTMLCanvasElement
HTMLButtonElement
HTMLBodyElement
HTMLBaseElement
HTMLBRElement
HTMLAreaElement
HTMLAppletElement
HTMLAnchorElement
HTMLElement
HTMLDocument