Pattern: :nth-child(Nth) The argument Nth is of the following format:

Pattern: :first-of-type   Definition: The :first-

Pattern: :only-of-type   Definition: The :only-of

Pattern: :only-child   Definition: The :only-chil

Pattern: element1 ~ element2   Definition: The element1 ~ element2 selector

Pattern: [attr^=substring]   Definition: The [attr^=substring] selector

Pattern: :empty   Definition: The :empty pseudo-class

Pattern: :lang   Definition: The :lang pseudo-class

Pattern: [attr~=val]   Definition:   The 

Pattern: [attr=val]   Definition: The [attr=val] selector matches