title: "moment is not defined" using moment.js
body: <p>I am working with moment.js, but as I am testing the moment.js library I continue to receive an error.</p>
  
  <pre><code>var back30Days=moment().subtract(30, 'days').format("dddd, MMMM Do YYYY, h:mm:ss p");
  </code></pre>
  
  <p>it returns "<code>moment not defined.</code>" referring to <code>.format("dddd, MMMM Do YYYY, h:mm:ss p");</code></p>
  
  <p>I've read the documentation, and everything looks fine, but when I reload my page, the js I'm working with won't load. </p>
  
  <p>any tips would be greatly appreciated!</p>