var total_photos_counter = 0; Dropzone.options.myDropzone = { uploadMultiple: true, parallelUploads: 2, maxFilesize: 16, previewTemplate: document.querySelector('#preview').innerHTML, addRemoveLinks: true, dictRemoveFile: 'Remove file', dictFileTooBig: 'Image is larger than 16MB', timeout: 10000, init: function () { this.on("removedfile", function (file) { $.post({ url: '/thpcustomer/images-delete', data: {id: file.name, _token: $('[name="_token"]').val()}, dataType: 'json', success: function (data) { total_photos_counter--; $("#counter").text("# " + total_photos_counter); } }); }); }, success: function (file, done) { total_photos_counter++; $("#counter").text("# " + total_photos_counter); } };