title: Uncaught Error: Cannot assign to a reference or variable
body: <p>I want to do validation and save email value to db. But it shows the "Cannot assign to a reference or variable"</p>
  
  <p><strong><em>HTML File</em></strong></p>
  
  <pre><code>&lt;div  class="form-group"&gt;
              &lt;label for="email"&gt;Email:&lt;/label&gt;
              &lt;span&gt;&lt;input id="email" [required]="!standingQueue" type="text" class="form-control" name="email"
              [(ngModel)]="email" #email&gt;&lt;/span&gt;
            &lt;/div&gt;
  </code></pre>