Using document.elementFromPoint()

[Schnodderbalken]

I am trying to use the document.elementFromPoint() function which returns the top visible element by x and y coordinates - see http://dev.w3.org/csswg/cssom-view/#dom-document-elementfrompointx-y
However,

 var Parser = require('parse5').Parser;
 var parser = new Parser();
 var doc = parser.parse(ff_dom);
 doc.elementFromPoint(1,1);

gives me a "TypeError: undefined is not a function" so it seems that the document object that is returned after parsing does not support this function although (according to this https://developer.mozilla.org/en-US/docs/Web/API/Document/elementFromPoint) Chrome supports it since version 4.0 and Firefox since version 3.

Is it planned to extend the functionality of this library by elementFromPoint? Or am I even doing something wrong?

[inikulin]

Parse5 provides pure HTML AST. For full-featured DOM use jsdom.

[vjyanand]

It's not implemented in jsdom either