javascriptsquare-connect
SquareUp SqPaymentForm() - how to allow 4 digit cvv for Amex?
I have a payment form using SquareUp's SqPaymentForm(). It embeds iFrames into the checkout page. The problem is the CVV field only allows three digits. This is a problem for American Express card holders.
Being an iFrame hosted by squp, I cannot control that cvv field directly. I've searched squp's docs and cannot find how to enable 4 digits. Does anyone know how to make squp allow 4 digits here?
Solution
If an AMEX credit card number is detected, the form automatically switches to allowing a 4 digit CVV. Otherwise it will restricts to 3 digits.
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