当url为空时，将活动类设置为导航栏上的“主页”按钮

I'm using this script for my dynamic navbar to set active class. What I want is to set the "home" button to active when you just visit the website and don't have the "index.php" in the url. Is this maybe easier with php?

/*menu handler*/
$(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);

  $('nav ul li a').each(function(){
    var currentPage = stripTrailingSlash($(this).attr('href'));

    if (activePage == currentPage) {
      $(this).parent().addClass('active');
    }
  });
});