js/80-sidebar.js

   1 $(function() {
   2         if(!document.getElementById('sidebar')) {
   3         let content = $('main')[0];
   4                 content.innerHTML = '<div class="col-md-9">' + content.innerHTML + '</div><aside id="sidebar" class="col-md-3"></aside>';
   5                 content.classList.add('row');
   6     }
   7 });