title: Why does interpolation does not work if I'm getting the expected result in the Console?
body: <p>I'm trying to make a Countdown in Vue.js but the interpolation is not working and I cannot understand why. </p>
  
  <p>I have declared this:</p>
  
  <pre><code>data() {
    return {
      dueDate: '' 
    }   
  },
  </code></pre>
  
  <p>And I'm trying to show it here:</p>
  
  <pre><code>&lt;div id="app"&gt;
    {{ dueDate }}
  &lt;/div&gt;
  </code></pre>
  
  <p>Here is my code: <a href="https://codepen.io/chechocz/pen/ExYQEQM" rel="nofollow noreferrer">https://codepen.io/chechocz/pen/ExYQEQM</a></p>
  
  <p>In the console I'm getting the expected result but it doesn't interpolate.</p>
  
  <p>Thanks in advance!</p>