Cross-Domain Data Posting with JSONP It is not possible to post data to JSONP using an asynchronous method due to the restrictions imposed by the same origin policy. JSONP's asynchronous functionality is dependent on the ability to insert tags into the DOM, which can only point to the same origin as the parent page.</p> <p>To post data cross-domain, you can utilize alternative approaches such as:</p> <ul> <li> <strong>Using a Regular Form POST:</strong> A form's action attribute can point to a different domain, allowing you to send data via a POST request.</li> <li> <strong>Employing Hacks:</strong> Advanced techniques exist that involve inserting hidden <iframe> elements and modifying their properties to achieve cross-domain data posting. Note that these methods may be complex and require caution.</li> </ul>