#Improvements
selector = function(element, index) (this = element) OR css query string OR array/Yocto object of elements OR single element to match against
reduce() filter(selector) first(selector) last(selector) is(selector) (alias = every)
Element support: col, colgroup and caption
Yocto#closest now supports multiple values (as it should).
map, filter, every, some (this = element).