title: App compile error: Cannot find namespace 'moment'
body: <p>I've been working on my angular 2 app yesterday and everything ran fine.
  Today I was trying to <code>npm start</code> my app and I get this compile error:</p>
  
  <pre><code>typings/browser/ambient/moment/index.d.ts(9,21): error TS2503: Cannot find namespace 'moment'.
  </code></pre>
  
  <p>Although I didn't mention anything releaeted to <code>moment</code> in my app!</p>
  
  <p>What can cause this error if I'm not using anything releated to <code>moment</code>?</p>
  
  <p>I tried:</p>
  
  <ol>
  <li><a href="https://stackoverflow.com/questions/35166168/how-to-use-moment-js-library-in-angular-2-typescript-app">The solutions here</a></li>
  <li><code>npm remove moment</code></li>
  </ol>
  
  <p>Any ideas?</p>