Integrating jQuery with a third-party payment gateway - handling callbacks correctly
I've searched everywhere and can't find a clear answer. I've been banging my head against this for hours... Currently developing a web application that requires a seamless integration with a third-party payment gateway using jQuery. The integration documentation shows that the payment provider uses callbacks to communicate the success or failure of transactions, but I've hit a snag in handling these callbacks effectively in my code. Here’s what I’ve tried so far: 1. **Basic AJAX Request**: Initially, I sent a POST request to the payment gateway and set up a callback function to handle the response. However, the callback does not execute as expected. ```javascript $.ajax({ url: 'https://api.paymentgateway.com/charge', method: 'POST', data: JSON.stringify({amount: 100, currency: 'USD'}), contentType: 'application/json', success: function(response) { console.log('Payment successful', response); }, error: function(xhr) { console.log('Payment failed', xhr.responseText); } }); ``` 2. **Event Binding**: I also explored using event binding to trigger payment verification after the user is redirected back from the payment gateway. This didn’t yield consistent results either. ```javascript $(document).on('paymentCallback', function(event, data) { if (data.success) { alert('Transaction successful!'); } else { alert('Transaction failed.'); } }); ``` 3. **Polling Mechanism**: As a last resort, I implemented a polling mechanism to check the transaction status periodically. While this works, it feels inefficient. ```javascript function checkPaymentStatus() { $.ajax({ url: 'https://api.paymentgateway.com/status', method: 'GET', success: function(response) { if(response.status === 'completed') { clearInterval(polling); alert('Payment confirmed!'); } } }); } var polling = setInterval(checkPaymentStatus, 5000); ``` None of these approaches seem to work as expected. The integration documentation mentions specific requirements for setting up the callbacks, but it's not clear how to implement them appropriately in the context of a jQuery application. Any insights or recommended best practices to ensure reliable handling of payment callbacks would be greatly appreciated! Am I missing something obvious? Any ideas what could be causing this? I recently upgraded to Javascript stable. Any feedback is welcome!