title: EXTJS - Listener for Json Store Loaded with No Data
body: <p>I'm trying to update the screen whenever a Json store is done loading data from the server. I tried registering "load", and "datachanged" listeners, and they both work only if data was either returned, or the data was changed from the cache.</p>
  
  <p>However, there are cases where nothing is returned from the server - an empty string and in this case neither listeners are invoked at all. What can I do in ExtJS for these special cases?</p>