Password matching in AngularJS using the $validators pipeline produces unexpected results

Question

See the example here.

Using the $validators pipeline, I am trying to check that a field contains the same value as another field.

Each input in this example is a

Answer 1

One problem is that when a validator fails (returns false), then the underlying model value is set to undefined. So:

1. You type something in the password, say "aaa"; this is NOT the same as passwordConfirm, so the validator returns false and the model gets the undefined value
2. You type the same value in passwordConfirm; but from above the value of the password is undefined and undefined !== "aaa", so the passwordConfirm validator returns false too.
3. And so on...