title: Text binding between input and span in Angular
body: <p>How can I bind input texts to span innerHTML in Angular6?</p>
  
  <p><strong>ts file</strong></p>
  
  <pre><code>...
  finance_fullname: string;
  ...
  </code></pre>
  
  <p><strong>template file</strong></p>
  
  <pre><code>&lt;input type="text" id="finance_fullname" [(ngModel)]="finance_fullname"&gt;
  &lt;span class="fullname" ngBind="finance_fullname"&gt;&lt;/span&gt;
  </code></pre>