Comments on: document.elementFromPoint – a jQuery solution

By: nickboss

nickboss — Sat, 11 Feb 2012 11:43:02 +0000

Be carefull with IE8, because even if (x,y) is out of viewport, document.elementFromPoint will return a non null object (HtmlHTMLElement) and it will make the routine behave incorrectly.

In this case you can do this:

…
var doc;
if ((sl = $(document).scrollTop()) >0)
{
doc = document.elementFromPoint(0, sl + $j(window).height() -1);
if ( doc != null ) { if ( doc.tagName.toUpperCase() == ‘HTML’ ) doc = null; }
isRelative = ( doc == null );
}
else if((sl = $(document).scrollLeft()) >0)
{
doc = document.elementFromPoint(sl + $(window).width() -1, 0);
if ( doc != null ) { if ( doc.tagName.toUpperCase() == ‘HTML’ ) doc = null; }
isRelative = ( doc == null );
}
…

By: admin

admin — Tue, 01 Nov 2011 15:06:22 +0000

thanks for the hint alexey !

By: angelo

angelo — Wed, 26 Oct 2011 10:49:43 +0000

that was really helpful

By: Alexey Kruchinin

Alexey Kruchinin — Sat, 01 Oct 2011 22:12:02 +0000

There’s a typo in the code
“$.elementFromPoint : function(x,y)”
should be
“$.elementFromPoint = function(x,y)”

By: javierfp

javierfp — Tue, 19 Apr 2011 14:21:48 +0000

Really helpful!

By: Henrik Hjelte

Henrik Hjelte — Sat, 22 Jan 2011 14:52:18 +0000

Smart, very useful.

By: Leo Pradipta

Leo Pradipta — Tue, 18 Jan 2011 06:38:03 +0000

Good Explanation… Good Topic…