Angular2: Find out if FormControl has required validator?

Question

does someone know a way to find out for an Angular2 FormControl if the required validor is registered for the control.

this.form = builder.group({name: ['', Validators.required]}; 

Can I then query the this.form.controls['name'] control if it is a required field? I know I can check if it is valid, but that's not what I want.

Kind regards, Marc

Answer 1

This function should work for FormGroups and FormControls

  export const hasRequiredField = (abstractControl: AbstractControl): boolean => {     if (abstractControl.validator) {         const validator = abstractControl.validator({}as AbstractControl);         if (validator && validator.required) {             return true;         }     }     if (abstractControl['controls']) {         for (const controlName in abstractControl['controls']) {             if (abstractControl['controls'][controlName]) {                 if (hasRequiredField(abstractControl['controls'][controlName])) {                     return true;                 }             }         }     }     return false; };