CSS3 - HTML5 Mastery: Semantics, Standards, and Styling - page 244

values that can be input into the number field. If the entered value falls into this range
between the minimum and maximum range, the :in-range selector style rule will ap-
ply, while if it is outside of this range, the :out-of-range selector will apply. The
range input form control can use these selectors too, in theory; however, as of this writ-
ing, only Opera supports it (and partially so, because the :out-of-range selector is
ignored).
Pattern matching selectors
Additional logic can be introduced into a selector by using one of the “nth-” type select-
ors, part of the tree-structural pseudoclass selectors group (see Table 6-9 ). All but one
of these selectors is new in CSS3.