@angular/forms

RequiredValidator

디렉티브

안정화

A directive that adds the required validator to any controls marked with the required attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

API

    
      class RequiredValidator extends AbstractValidatorDirective {}

required

string | boolean

Tracks changes to the required attribute bound to this directive.

설명

A directive that adds the required validator to any controls marked with the required attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

다음 모듈에서 내보냄

FormsModule
ReactiveFormsModule

사용 시 참고사항

Adding a required validator using template-driven forms

<input name="fullName" ngModel required>