granite-validator-mixin:
[ This description is mirrored from README.md at github.com/LostInBrittany/granite-validator-mixin on 2019-05-22 ]
GraniteElements.ValidatorMixin
A mixin to implement a custom input or form validator
Doc & demo
https://lostinbrittany.github.io/granite-validator-mixin
GraniteElements.ValidatorMixin
Use GraniteElements.ValidatorMixin to implement a custom input/form validator. Element
instances implementing this behavior will be registered for use in elements that implement
Polymer.IronValidatableBehavior.