title: WebStorm auto completion does not work for React js
body: <p>I've created a project using <code>create-react-app</code>. I have switched my JavaScript language version to <code>React JSX</code> in <code>Preferences</code> | <code>Languages &amp; Frameworks</code> | <code>JavaScript</code>.
  But I still have unresolved variable warning and unresolved function warning.</p>
  
  <p><a href="https://i.stack.imgur.com/eyyFn.png" rel="noreferrer"><img src="https://i.stack.imgur.com/eyyFn.png" alt=""></a></p>