String validation

Elegant iOS form builder in Swift

✅ Painless Vue forms

[INACTIVE] Client Side Validation for AngularJS 1. (You should use version > 2 💥)

Ember computed property based validations

Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dimension: { width: { in: 800..1600 }

A gem/plugin for Rails 3, Rails 4, Rails 5, and Rails 6 that enables client-side validation using ActiveModel + HTML5 Form Validation

Validation mixin for Ruby objects

Valiktor is a type-safe, powerful and extensible fluent DSL to validate objects in Kotlin

Easily create forms with client side validations.

Easy structured data for websites. All validated for syntax and semantics. Simple declarative-style coding.

Custom validation error messages for sails model with i18n support

Normalize and validate input sets from the web, APIs, the CLI, and more, including files

Functional validations inspired by Ruby's ActiveModel

A simple JavaScript validation library that doesn't interfere

A custom validation for your Active Model that check if an array is included in another one

Higher Order Component for Validating Forms in React

Starter code and challenges for validations & error-handling in Rails

Validation frontend for models.

The easiest way to make complex forms with validations.