title: Is it possible to await a page entrance animation?
body: <p>I have the following animation set on a scrollviewer:</p>
  
  <pre><code>&lt;ScrollViewer.Transitions&gt;
    &lt;TransitionCollection&gt;
      &lt;EntranceThemeTransition /&gt;
    &lt;/TransitionCollection&gt;
  &lt;/ScrollViewer.Transitions&gt;
  </code></pre>
  
  <p>This brings me a nice animation where the scrollviewer (and it's content) enters from the right on the page load. But I have some content inside the scrollviewer which need some time to load from a database. I want to await this loading and then start the animation. How can I await the loading and trigger the animation on my own instead of on every page enter? </p>