Ng Reactive Form Validator

Features

• Automatic Form Control Validation: Automatically manages form control validation and displays error messages based on validation rules.
• Custom Error Messages: Supports customizable error messages using static strings or observables.
• Seamless Translation Integration: Easily integrates with Transloco or other translation packages for internationalized error messages.
• Default Styles: Provides default styles that manage the visibility transitions of form validation labels. These styles include keyframe animations and CSS classes designed to smoothly show and hide validation messages.

Installation

Install the library using npm:

npm install ng-reactive-form-validate

Add base styles to the angular.json file (optional) Make sure to include the following styles under the "build" section of your angular.json file:

"build": {
    "styles": [
      "node_modules/ng-reactive-form-validate/src/lib/styles/index.scss"
     ],
}

Usage

Importing the Module into a Standalone Component/App module/Feature module

Example: Using plain text error messages

@Component({
  selector: 'standalone-comp',
  standalone: true,
  imports: [
    NgReactiveFormValidate,
    // ...Other modules
  ],
  providers: [
    {
      // It's mandatory to provide a key:value pair to the ERROR_MESSAGES injection token
      provide: ERROR_MESSAGES,
      useValue: {
        required: "Required",
        // Additional error messages can be added here
      },
    },
  ],
})

Example: Using a Transloco service

@Component({
  selector: 'standalone-comp',
  standalone: true,
  imports: [
    NgReactiveFormValidate,
    // ...Other modules
  ],
  providers: [
    {
      provide: ERROR_MESSAGES,
      useFactory: (translocoService: TranslocoService) => {
        return {
          required: translocoService.selectTranslate('required'),
          minlength: (args: { requiredLength: number }): Observable<string> => {
            return translocoService.selectTranslate('minlength', {
              num: args.requiredLength,
            });
          },
        };
      },
      deps: [TranslocoService],
    },
  ],
})

License

This project is licensed under the MIT License

Repository

For more details and examples of using it, visit my GitHub repository (https://github.com/vbnr/ng-reactive-form-validate).