@angular/forms

MaxLengthValidator

디렉티브

안정화

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

API

    
      class MaxLengthValidator extends AbstractValidatorDirective {}

maxlength

string | number | null

Tracks changes to the maximum 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 maximum length validation to controls marked with the maxlength attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

다음 모듈에서 내보냄

사용 시 참고사항

Adding a maximum length validator

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

<input name="firstName" ngModel maxlength="25">