Get validators present in FormGroup/FormControl

Question

I\'m using Material 2 in my app, but in this question I want to solve a problem specifically with Input.

As you can see in API Reference there\'s a

Answer 1

I adjusted the code from joh04667 and HankCa to this:

export const hasValidator = (form: FormGroup, controlPath: string, validator: string): boolean => {
  const control = form.get(controlPath);
  const validators = control.validator(control);
  return !!(validators && validators.hasOwnProperty(validator));
};

Which I store in a file called util.ts and import in the component that contains the form like this:

import * as util from '@app/shared/util';

And define util in your class:

public util = util;

Add the directive to your input component like this:

[required]="util.hasValidator(myForm, 'path.to.control', 'required')"