Default to using contains for determining if an element is contained within another (virtually de facto standard at this point - and IE 9 has issues with compareDocumentPosition - not existing on XML documents).
Default to using contains for determining if an element is contained within another (virtually de facto standard at this point - and IE 9 has issues with compareDocumentPosition - not existing on XML documents).

npmcomponent/cristiandouce-sizzle,mzgol/sizzle