title: Convert current time to milliseconds using moment
body: <p>Suppose I have this time</p>
  
  <pre><code>'2018-08-03T15:53:57.000Z'
  </code></pre>
  
  <p>I need to convert only the time part to <code>milliseconds</code></p>
  
  <p>I tried this but didn't work and throws error</p>
  
  <pre><code>moment.utc("2018-08-03T15:53:57.000Z").format('HH:mm:ss').milliseconds()
  </code></pre>
  
  <p><strong>Error</strong> </p>
  
  <pre><code>TypeError: (0 , _moment2.default)(...).format(...).milliseconds is not a function
  </code></pre>
  
  <p>Can someone please help how can I convert only time to millisecond?</p>
  
  <p>Thank you!!!</p>