Trying to animate the background color of a document fragment can easily fail

I discovered this as I wanted to run unit-tests on document-fragments to avoid having the browser trying to actually render them. (For speed).

The problem is that the method getColor (in the effects package) will return undefined as / if the document fragment root does no color.

Bad bad library. :)

Here's the problematic code

function getColor(elem, attr) {

var color;

do {

color = $.curCSS(elem, attr);

// Keep going until we find an element that has color, or we hit the body

if ( color != '' && color != 'transparent' || $.nodeName(elem, "body") )

break;

attr = "backgroundColor";

} while ( elem = elem.parentNode );

return getRGB(color);

};

I think that this needs another check which defaults to 'transparent' if no color cold be found (or otherwise defaults to something that is valid for that browser).