javascript - how to totally remove any kind of Thumbnails using Jquery FileUpload library? -

i'm using jquery fileupload upload files on server.

i need remove kind of thumbnails in html area of upload, if configured javascript , php avoid thumbnails, still have them in 2 occasions:

• when add file, it's created canvas image
• when file uploaded, created html image thumbnail link

i don't want space thumbnails in box, @ all. these configuration (i copy code of interest)

this configuration javascript

$('#fileupload').fileupload({     **previewsourcefiletypes: '',**     url: 'tfnav?page=upload' }); 

and configuration php:

$this->options = array(         'script_url' => $this->get_full_url().'/',     'upload_dir' => $this->_hattach->getuploadpath(),         'upload_url' => $this->get_full_url().'/files/',         'user_dirs' => false,         'mkdir_mode' => 0755,         'param_name' => 'files',         'delete_type' => 'delete',         'access_control_allow_origin' => '*',         'access_control_allow_credentials' => false,         'access_control_allow_methods' => array(             'options',             'head',             'get',             'post',             'put',             'patch',             'delete'         ),         'access_control_allow_headers' => array(             'content-type',             'content-range',             'content-disposition'         ),         'download_via_php' => false,         // defines files can displayed inline when downloaded:         **'inline_file_types' => '',**         // defines files (based on names) accepted upload:         'accept_file_types' => '/.+$/i',         .... 

but these configurations not enough, how can remove them? lot in advance

inside uploadhandler.php

comment inside 'image_versions'

'image_versions' => array() 

or

 $upload_handler = new uploadhandler(array(     'image_versions' => array() // no image versions ));