title: Dropzone JS Listen To Success Event of Multiple Files Uploaded
body: <p>I'm using Dropzone JS and I have this code. It works fine :</p>
  
  <pre><code>    &lt;script&gt;
          $(function() {
  
              //-- Start DROPZONE --//
              var myDropzone = new Dropzone(".dropzone", { 
                  url: "test2.php?token='.$product_token.'",
                  maxFilesize: 2,
                  maxFiles: 10,
                  uploadMultiple: true
              });
  
              myDropzone.on("successmultiple", function(multiple) {
                  $("#btn-addnew").removeClass("disabled");
              });
              //-- End DROPZONE --//
  
          })
      &lt;/script&gt;
  </code></pre>
  
  <p>However, <code>$("#btn-addnew").removeClass("disabled");</code> executed when only one file get successfully uploaded. even there are 5 files still uploading. how to prevent <code>$("#btn-addnew").removeClass("disabled");</code> to be executed until ALL files successfully uploaded?</p>
  
  <p>thank you so much for your attention.</p>