Add and active class to a link within a conainer
// Add active '.current-cat' to currently active category filter <li> element
var linkList = document.querySelectorAll('.filter-categories a');
for (var i in linkList) {
if (document.location.href.indexOf(linkList[i].href) >= 0) {
linkList[i].parentNode.classList.add('current-cat');
}
}
// exact match, BUT watchout for parent/child relational pages.
var linkList = document.querySelectorAll('.menu-container li a');
for (var i in linkList) {
console.log(linkList[i].href);
if (document.location.href === linkList[i].href) {
linkList[i].parentNode.classList.add('active');
}
}