SharePoint : Code snippet to get Search Result URL in JSOM

SP.SOD.executeFunc('sp.js', 'SP.ClientContext', function () {
            var clientContex = SP.ClientContext.get_current();
            var web = clientContex.get_site().get_rootWeb();
            var properties = web.get_allProperties();
            ctx.load(properties);
            ctx.executeQueryAsync(function (sender, args) {
                if (properties.get_item("SRCH_ENH_FTR_URL")) {
                   var searchResultUrl = properties.get_item("SRCH_ENH_FTR_URL");
                }
            });
        });