fixes #1074 activeElement is breaking $.contains() method

[Amitesh]

fixes #1074 for activeElement is breaking $.contains() method for lower version of jQuery 1.7 but it works well with jQuery 2.1.3.

[https://codepen.io/amitesh/pen/PRLwvQ](Sample code on CodePen)

[DanielRuf]

jQuery 1.7

and older is not really recommended anymore

[Amitesh]

Yes.
I suggest, we should ensure to provide DOM element to $.contains() method because it is expecting DOM element as parameters otherwise, it will always return false.
For jQuery 1.7 it is throwing error on console while for higher version like 2.1.3 silently giving false everytime.

The $.contains() method returns true if the DOM element provided by the second argument is a descendant of the DOM element provided by the first argument, whether it is a direct child or nested more deeply. Otherwise, it returns false. Only element nodes are supported; if the second argument is a text or comment node, $.contains() will return false.

For reference $.contains()