dynamic ajax submit.js

$('form').submit(function (event) {
event.preventDefault();
var _this = $(this);
  $.ajax({
                type: "POST",
                url: _this.attr('action'),
                data: new FormData(this),
                processData: false,
                contentType: false,
                success: function (data) {
                    console.log('success');
                },
                error: function (data) {
                    if (data.status = 422) {
                        var i = 0
                        $('.helper-text').remove();
                        $('.modal').animate({ scrollTop: 0 }, 'slow');

                        $.each(data.responseJSON.errors, function (key, value) {
                            i = i++;
                            $('[name="' + key + '"]').addClass('invalid error').parent().show();
                            $('[name="' + key + '"]').after(
                                "<small class='helper-text text-danger'>" + value +
                                "</small>")

                        });
                    }
                }
            });
 });