Handle buyer errors

Buyer checkout error

If an error prevents buyer checkout, alert the user that an error has occurred with the buttons using the onError callback:

1paypal.Buttons({
2    onError: function (err) {
3      // For example, redirect to a specific error page
4      window.location.href = "/your-error-page-here";
5    }
6  }).render('#paypal-button-container');

This error handler is a catch-all. Errors at this point are not expected to be handled beyond showing a generic error message or page.

Script not loading error

If null pointer errors prevent the script from loading, provide a different checkout experience:

1if (window.paypal && window.paypal.Buttons) {
2    // render the buttons
3  } else {
4    // show a fallback experience
5  }