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@angular/formscode
MinLengthValidator
directive
stable
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.
On this page
API
class MinLengthValidator extends AbstractValidatorDirective { @Input() minlength: string | number | null; override enabled(input: unknown): boolean;}
enabled
booleanDetermines 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.
@paraminput
unknown@returns
booleanDescription
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.
Exported by
Usage Notes
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">Jump to details