Where to find isomorphic js validator?

Question

JavaScript

Criteria:
the ability to add your own validation rules,
the ability to specify the text of the error message,
in case of an error returns an object with the name of the field and the text of the error.

Answer 1

Unexpectedly https://validatejs.org

Answer 2

Nothing prevents you from writing your own, but why don't you like jslint?

Answer 3

Есть ещё LIVR. Правда вместо текста ошибки он возвращает код ошибки, но всё равно штука интересная.