redirect property
By default, stripe.confirmSetup will always redirect to your return_url after a successful confirmation. If you set redirect: "if_required", then stripe.confirmSetup will only redirect if your user chooses a redirect-based payment method. Note: Setting if_required requires that you handle successful confirmations for redirect-based and non-redirect based payment methods separately. When a non-redirect based payment method is successfully confirmed, stripe.confirmSetup will resolve with a {setupIntent} object.
Implementation
SetupConfirmationRedirect? get redirect => throw _privateConstructorUsedError;