gistfile1.js

//Takes a url to JSON data and returns an object

function req(url, cb) {
  var r = new XMLHttpRequest();
  r.open('GET', url, true);
  r.onload = function() {
    if(this.status != 200) return cb(new Error("Expected 200 got " + this.status));
    try { 
      var data = JSON.parse(this.response) 
    } catch(e) { 
      return cb(new Error("Error parsing JSON:" + e.toString())); 
    }
    cb(null, data);
  }
  r.onerror = function() {
    cb(new Error("Error requesting " + url));
  }
  r.send();
}

req('./data.json', function(err, data) {

  if(err) {
    return console.error("There was an error requesting data:", err);
  }

  [ 'title_popular', 'title_exact', 'title_substring' ].forEach(function(title) {

    var t = data[title];

    for(var i = 0; i < t.length; i++) {

      console.log("Title of item:       " + t[i].title);
      console.log("Description of item: " + t[i].description);
      console.log("ID of item:          " + t[i].id);

    }

  });

});