Hi,
The primary area of TestComplete is to access UI objects and interact with them like the human user does.
From this point of view, any jscript library is irrelevant to the test because all interaction goes through the UI that is added to web page by this or that library.
In case it is not possible to reliably identify and interact with the UI of web page, personally I consider this to be a flaw in application's design and implementation.
However, TestComplete also can search for the native html elements on web page using XPath/CSS selectors and use the found elements. While this obviously deviates from the principle of end user's actions emulation, sometimes this may be the only way to interact with the elements of the poorly designed web pages.
