CheckboxRequiredValidator — Angular

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

API

class CheckboxRequiredValidator extends RequiredValidator {
  override required: string | boolean;
}

required

string | boolean

Tracks changes to the required attribute bound to this directive.

Description

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

Exported by

FormsModule
ReactiveFormsModule

Usage Notes

Adding a required checkbox validator using template-driven forms

The following example shows how to add a checkbox required validator to an input attached to an ngModel binding.

<input type="checkbox" name="active" ngModel required>