title: Get a timespan in milliseconds using momentjs
body: <p>I try the following to get a timespan in milliseconds: </p>
  
  <pre><code>moment(0).minute(10).milliseconds()
  </code></pre>
  
  <p>The idea is to have a simple and readable way to convert timespans into milliseconds. But unfortunately this will always return <code>0</code>, the initial time.</p>