@angular/forms

MinLengthValidator

디렉티브

안정화

A directive that adds minimum length validation to controls marked with the minlength attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

API

    
      class MinLengthValidator extends AbstractValidatorDirective {}

minlength

string | number | null

Tracks changes to the minimum length bound to this directive.

Determines whether this validator should be active or not based on an input. Base class implementation checks whether an input is defined (if the value is different from null and undefined). Validator classes that extend this base class can override this function with the logic specific to a particular validator directive.

@paraminputunknown

@returnsboolean

설명

A directive that adds minimum length validation to controls marked with the minlength attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

다음 모듈에서 내보냄

사용 시 참고사항

Adding a minimum length validator

The following example shows how to add a minimum length validator to an input attached to an ngModel binding.

<input name="firstName" ngModel minlength="4">