v8n

Enables readable, English-like validation chains that reduce boilerplate, as demonstrated in examples where complex rules like 'some.not.uppercase()' are expressed intuitively.

Allows seamless integration of user-defined validation functions via .extend(), treating them like built-in rules, shown with the 'foo' custom rule example.

Supports boolean tests, exception-based validation, failure lists, and async checks, providing flexibility for different scenarios like backend API validation.

Validations can be exported and imported as JavaScript modules, promoting code reuse across projects, illustrated in the 'specialNumber.js' example.