title: Bind directly to value property instead of ngModel
body: <p>To bind the value of an input to a property, we use the ngModel directive. For example:</p>
  
  <pre><code>&lt;input type='text' [(ngModel)]='model' /&gt;
  </code></pre>
  
  <p>Why can't we simply use binding on the <code>value</code> property of the input element?</p>
  
  <pre><code>&lt;input type='text' [(value)]='model' /&gt;
  </code></pre>