title: Directives in AngularJs 1.x: isolated scope vs require ngModel
body: <p>I've always been using isolated scope in my directives in Angular 1.x. However, I came across a directive that just used <code>ngModel</code>. Now, I've seen there are some issues when using both (I know it's possible, sort of?).</p>
  
  <p>Anyways, my question is, what are the major differences when using isolated scope and requiring <code>ngModel</code>?</p>
  
  <p>I did an example and based on this, I don't see any differences? The example is available here: <a href="http://plnkr.co/edit/ExGcigFz369QXxvYWOZR?p=preview" rel="nofollow">http://plnkr.co/edit/ExGcigFz369QXxvYWOZR?p=preview</a></p>
  
  <p>So, any kind of explanation is welcome.</p>
  
  <p>Thanks in advance!</p>