source: https-redirection/trunk/js/script.js

(function ($) {
    $(document).ready(function () {
        /* add notice about changing in the settings page */
        $(document).on('click', '.rewrite_item_add_btn', function () {
            $(this).each(function () {
                if ($(this).prev().val() != '') {
                    $(this).next().hide();
                    $(this).parents('.rewrite_new_item').removeClass('rewrite_new_item').clone().addClass('rewrite_new_item').appendTo($(this).parents("td")).find('input').val('');
                    $(this).addClass('rewrite_item_delete_btn').removeClass('rewrite_item_add_btn');
                    $(this).children('.dashicons').addClass('dashicons-trash').removeClass('dashicons-plus-alt2');
                } else {
                    $(this).next().show();
                }
            });
        });

        $(document).on('click', '.rewrite_item_delete_btn', function () {
            $(this).each(function () {
                $(this).parent().remove();
            });
        });

        // Toggle merge tag hints
        $(document).on('click', 'a.ehssl-toggle', function (e) {
            e.preventDefault();
            var div = $(this).siblings('div');
            if (div.is(':visible')) {
                $(this).removeClass('toggled-on');
                $(this).addClass('toggled-off');
            } else {
                $(this).removeClass('toggled-off');
                $(this).addClass('toggled-on');
            }
            div.slideToggle('fast');
        });
    });
})(jQuery);