#dorian6730_docs
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- dorian6730_docs, 6 days ago, 6 messages
mellow wren
Hello
For that specific flow, backend code in Step 4 and 5 runs after customer clicks submit.
The idea is to create a customer using the API (if one doesn't already exist. If one already exists, retrieve it using the API). Step 5 is to create a SetupIntent for that specific customer ID and respond with client-secret.
So when the customer "submits", your client-side code gets a SetupIntent from your server for a specific customer & confirms it using the collected payment method information.
How do I trigger Stripe to validate what the user has entered
If you're referring to the card information, we automatically validate the format of the card number, expiry etc when they're being provided in the elements.
gilded breach
Thanks @mellow wren. Yes I see those validations now, thanks. Is there a way for me to know when all entries are valid, so I only enable my Submit button then?
mellow wren
Yes.. You can listen for change event on PaymentElement & look at complete param to identify if the necessary details have been provided with potentially valid inputs - https://docs.stripe.com/js/element/events/on_change?type=paymentElement#element_on_change-handler-complete
gilded breach
Got it thanks. So once I get that change event, I enable my Submit button, the user clicks it, I create a custoemr if one diesnt exsits, create the setup intent, return that to the frontend wheere the final step is #6, Submit setup to stripe.
mellow wren
Yup. You can inspect the code in Step 6 under handleSubmit
gilded breach
Got it thanks