title: How can I configure WebStorm to provide code completion for KoaJS?
body: <p>Currently, WebStorm reports that KoaJS's methods are undefined. It's a minor, yet persistent annoyance. I've searched on the net and I've searched through WebStorm's configuration dialogs to no avail.</p>
  
  <p>Does anyone use WebStorm with KoaJS and have intellisense/code completion working properly?</p>
  
  <p><a href="https://i.stack.imgur.com/7vkI7.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7vkI7.png" alt="enter image description here"></a></p>