title: Angular: Using [FormControl] in input
body: <p>(Angular 4): What is the difference between</p>
  
  <pre><code>&lt;input type="text"
  id="productNameInput"
  [formControl]="myForm.get('productName')"
  [(ngModel)]="productName
  </code></pre>
  
  <p>and</p>
  
  <pre><code>&lt;input type="text"
  id="productNameInput"
  [formControl]="myForm.controls['productName']"
  [(ngModel)]="productName
  </code></pre>
  
  <p>Are the two ways of assigning to formControl effectively the same? When would you use each?</p>
  
  <p>Thanks</p>