In Square Widget (or any other payment widget) Could the user define the Product option?

Is there any way the user can type in their own product option? So, they buy a t shirt and the product option is "What Text would you like on your T Shirt" and then there are two text fields that can be input - "Front" and "Back" for example. 

Add 2 x "Ticket" 

Ticket one: Full Name, Email address
Ticket two: Full Name, Email address

Is this function available anywhere?

Unfortunately it is currently not possible to add product option without preset options but with a little workaround, it is possible to achieve your requirement to collect front & back text data.

You can add two short entry field for users to input front and back text content. We can inject custom css code to place the form field next to payment field and take advantage of our condition feature to show / hide the textboxes if the product of payment tool is selected.

Please take a look at the following demo form I created for you and see if it fits into your requirement:  https://form.jotform.com/82322753611956 

Feel free to clone this form for a closer look. The following guide should help you in form cloning:  https://form.jotform.com/82322753611956

Please note that the above workaround will not work in Cards form layout as it is currently not possible to inject custom css code in cards form.

Thats a clever work around thank you. 

ive noticed a number of these things do not work in the cards layout yet.  is that being worked on? 

I would suggest you to please let us know what is not working for you in cards form layout and we will take a look.

We will wait for your response.