List NZ Postcodes

The mind must be given relaxation; it will arise better and keener after resting. As rich fields must not be forced-for their productiveness, the have no rest, will quickly exhaust them constantlabor will break the vigor of the mind, but if it is released and relaxed a little while, it will recover its powers
Seneca

:user-valid (:-moz-ui-valid)

The :user-valid CSS pseudo-class represents any validated form element whose value validates correctly based on its validation constraints. However, unlike :valid it only matches once the user has interacted with it.
:user-valid css reference