// append custom query parameter
(function appendQueryParameter() {
if (history.pushState) {
var
queryParameter = $("#append-query-parameter").data("query-parameter");
if (queryParameter !== undefined && queryParameter !== null && queryParameter !== ""){
var newurl = window.location.protocol + "//" + window.location.host + window.location.pathname + '?' + queryParameter;
window.history.pushState({path:newurl},'',newurl);
}
}
})();