ngx-reactive-form-class-validator

ngx-reactive-form-class-validator is a library that bridges Angular's reactive forms with the class-validator library, enabling dynamic, declarative validation based on TypeScript class decorators. It simplifies form validation by allowing developers to define validation rules directly on their model classes, ensuring consistency between the data model and form logic.

Key Features

• Dynamic Validation — Automatically validates form controls using class-validator decorators applied to the underlying model class.
• Seamless Angular Integration — Provides ClassValidatorFormGroup, ClassValidatorFormControl, and a ClassValidatorFormBuilderService that extend Angular's native form classes for easy adoption.
• Nested Object Support — Validates nested form groups through the @ValidateNested decorator, supporting complex object structures.
• Custom Validator Combination — Allows mixing dynamic class-validator rules with custom Angular validators using methods like setValidatorsWithDynamicValidation.
• Eager Validation Option — Configurable to run validation immediately after form initialization or after the view is fully loaded.
• Backward Compatibility — Includes untyped versions of form classes to maintain compatibility with Angular's untyped form APIs.

Philosophy

The library emphasizes a declarative and type-safe approach to form validation, reducing boilerplate and keeping validation logic close to the data model. It aims to enhance developer experience by leveraging existing class-validator ecosystems within Angular applications.