rails ajax form js

ajax_Form.js

    $('#signup-button').click(function (e) {
        e.preventDefault();
        var $form = $('.registration-form');
        var postData = $form.serialize();
        var formURL = $form.attr("action");
        var validForm = validateFormRequiredField('.registration-form') && acceptTermsCondition() && validAddress() && validateEmail() && matchPassword();
        if (validForm) {
            $.ajax({
                type: 'POST',
                url: formURL,
                data: postData,
                success: function () {
                    toastr.success(I18n.t('sign_up.user_successfully_registered'));
                    $('#user_sign_up').modal('hide');
                },
                error: function (textStatus, errorThrown) {
                    toastr.error(I18n.t('sign_up.failed_to_register'));
                }
            });
        }
    });

    $('.user-password-confirmation').focusout(function () {
        matchPassword();
    });