title: Get count of selected files in dropzone
body: <p>What I m trying to do is get a count of selected files in dropzone before upload them. </p>
  
  <pre><code>var count= myDropzoneNST.getAcceptedFiles().length;
  </code></pre>
  
  <p>I can get a count of uploaded files using this line, but What I m trying to do is to get count of selected valid files before upload them.</p>