Jquery
$(function(){
function stripTrailingSlash(str) {
if(str.substr(-1) == '/') {
return str.substr(0, str.length - 1);
}
return str;
}
var url = window.location.pathname;
var activePage = stripTrailingSlash(url);
$('#left-nav ul li a').each(function(){
var currentPage = stripTrailingSlash($(this).attr('href'));
if (activePage == currentPage) {
$(this).addClass('active');
}
});
});
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