@angular/forms

RequiredValidator

directive

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.

  
    class RequiredValidator extends AbstractValidatorDirective {}

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.

Exported by

FormsModule
ReactiveFormsModule

Adding a required validator using template-driven forms

          <input name="fullName" ngModel required>

required

string | boolean

Tracks changes to the required attribute bound to this directive.

enabled

boolean

@paraminputboolean

@returnsboolean

ngOnChanges

void

@paramchangesSimpleChanges

@returnsvoid

validate

ValidationErrors

@paramcontrolAbstractControl<any, any>

@returnsValidationErrors

registerOnValidatorChange

void

@paramfn() => void

@returnsvoid