The response is wrapped by a function when requested to the URL with an optional queryString parameter myFunc. There is no possible way to get the HTTP error codes when requesting JSONP data over cross-origin. JavaScript Please log in again. Sending an HTTP GET request to this URL returns the following data. But the practical implementation of the approach involves subtle differences that are often not explained clearly. jQuery JSONP Intro. JSONP is a method for sending JSON data without worrying about cross-domain issues. In an HTML page, a