JSONP is a special JSON data type that bypasses CORS (Cross Origin Resource Sharing) rules. To define JSONP, assign Short to be jsonp.
Meanwhile, you need to assign a proper callback function name. Put this name in config.json:
Callback_name default:"callback"
Then the JSON data returned will be wrapped as argument to the function i.e.:
callback(ORIGINAL_JSON_data)
By properly define callback in Javascript, you can manipulate the data as you want.
JSONP is an obsolete solution to CORS, which Genelet also supports. See Section 5.1.