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 | booleanTracks 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
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>