querySelector not working

[ChrisSG]

Hi,

for me querySelector in App.js (line 166 and 223) does not work and thus the live-refresh in devmode is not woring. It returns null... I replaced it with a the following function:

App.prototype.selectElement = function (elementName, attribute, value){
  var items = document.getElementsByTagName(elementName);
  var element = null;
  for(var i = 0; i < items.length; i++) {
    if (items[i].getAttribute(attribute).indexOf(value) == 0) {
      element = items[i]
      break;
    }
  }
  return element;
};

Respectively calling:
166 return this.selectElement('script','src','/derby/' + this.name)
223 var styleElement = app.selectElement('style','data-filename',data.filename);

Regards,

Chris