add log test

index2.html

@@ -133,7 +133,7 @@
       document.getElementById("mySidenav").style.width = "0";
     }
     function load_data(id){
-      var filtered = collection.filter(function (item) {
+      var filtered = loaded_data.filter(function (item) {
         return item.id === id;
       });
       alert(filtered.title);