vuelidate

Defines validation rules directly on component data models, reducing boilerplate and making logic declarative, as shown in the Options and Composition API examples in the README.

Works seamlessly with both Vue 2.x and 3.0, including Options and Composition APIs, providing flexibility for migration and diverse project setups.

Offers configurable lazy validation via the $lazy option to run validations only after fields are dirty, optimizing performance for large or complex forms.

Emphasizes minimalism and integrates naturally with Vue's reactivity system without heavy abstractions, keeping bundle size small and setup straightforward.