<div style="width: 100%" class="dropzone image" id="image" data-field="image"> <input type="hidden" name="image"> </div> code example

Example: dropzone accepted files

<script type="text/javascript">
   Dropzone.options.dropzone = {
        accept: function(file, done) {
            console.log(file);
            if (file.type != "image/jpeg") {
                done("Error! Files of this type are not accepted");
            }
            else { done(); }
        }
    }
 </script>