requiredIfValidatorFnMutableInput

requiredIfValidatorFnMutableInput.ts

export function requiredIf(requiredIf:{value:boolean}): ValidatorFn {
  
    return (control: AbstractControl): ValidationErrors | null => {
     
     let value = control.value;
     if ((value == null || value == undefined || value == "") && requiredIf.value) {
                return {
                    requiredIf: {condition:requiredIf.value}
                };
        }
     return null;
    }
}