title: What will happen if I use async/await with the function that returns nothing?
body: <p>First of all, I am a beginner at javascript, especially in async/await/promise.</p>
  
  <p>I want to use <code>seekTo()</code> method in the video library(react-native-youtube) synchronously. In <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await" rel="nofollow noreferrer">MDN guide</a>, it said Await Expression need Promise or some value. Is it possible to use the <code>seekTo()</code> method even if it returns nothing?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>initVideo = async () =&gt; {
    await this._youTubeRef &amp;&amp; this._youTubeRef.seekTo(startTime);
    this.setState({
      isPlaying: true
    });
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p>If someone knows well about the react-native-youtube library, please advise me how to set endTime of the video to section playback.</p>