title: Angular2: changing value of input
body: <p>In my input I enter <code>123</code>. On submit I want to have <code>456</code>.</p>
  
  <p>How to change an input value? </p>
  
  <p>My HTML (Ionic2)</p>
  
  <pre><code>&lt;ion-textarea [ngFormControl]="message"&gt;&lt;/ion-textarea&gt;
  </code></pre>
  
  <p>JavaScript</p>
  
  <pre><code>this.message.value = '456';
  console.log('&gt;&gt;&gt;', this.message.value); // output is '123'
  </code></pre>