test.js

(function ($) {
    "use strict";
    Drupal.behaviors.origin3_user = {
        attach: function (context, settings) {

            var user_id = settings.origin3_user_user_proof.userId;
            var deleteBaseUrl = settings.origin3_user_user_proof.deleteUrl;

            $('#origin3-user-user-document-form input[type="file"]').each(function () {
                $(this).css('opacity', 0);
            });

            $("a.add_file").on("click", function () {
                var field_ref = $(this).data('ref');
                $("#" + field_ref).trigger("click");
            });
            var url = window.location.protocol + "//" + window.location.host;

            $('a.delete-link', context).once('div:not([class])', function () {
                var document_key = $(this).data('document-key');
                $(this).click(function(e) {
                    e.preventDefault();
                    var postAjax = $.post( url + '/user/investor/document/' + user_id + '/' + document_key + '/delete', {});

                    postAjax.done(function(data){
                        $('#origin3-user-user-document-form').empty().html(data);
                    });

                });
            });
        }
    };
})(jQuery);