loop through a complex object json javascript

Javascript

/* Function to load json file or url - load json with javascript no jquery */
function load_json(path, callback) {
    var httpRequest = new XMLHttpRequest();
    httpRequest.onreadystatechange = function() {
        if (httpRequest.readyState === 4) {
            if (httpRequest.status === 200) {
                var data = JSON.parse(httpRequest.responseText);
                if (callback) callback(data);
            }
        }
    };
    httpRequest.open('GET', path);
    httpRequest.send(); 
}

// load_json on external file
load_json('https://kruxor.com/js/test_complex_object.json', function(data){
    // return the data so we know what we are looping through
	console.log(data);
  for(var key in data) {
      var value = data[key];
      if(typeof value == 'object') {
          if(value instanceof Array) {
              // an array. loop through children
              for(var i = 0; i < value.length; i++) {
                  var item = value[i];
                  console.log(item);
              }
          } else {
              // not an array?
            console.log(item);
          }
      } else {
          // return the item?
            console.log(value);
      }
  }
  
});