Are there events to which I can subscribe available in your forms?

I'm trying to find a form building environment to use in our SaaS platform to customize and augment some of our existing data acquisition flows.

These flows are modeled as Single Page Applications which manage the "state" of the activity according to the business needs.  I'd like to be able to allow a JotForm to be "inserted" into the flow and have a generic way to capture "next" and "back" buttons on the form.

I can't seem to find any documentation on this capability - only the javascript embed code.

Are you looking to capture data on each page of the form before it gets submitted? If that is correct, please check this guide: https://www.jotform.com/help/97-How-to-Save-Forms-and-Continue-Later 

This method will allow you to save data in a form via a URL session ID. So, the user can continue later, and fill it from any device, and anywhere. 

Let us know if you need more help.

Nope, not at all what I'm looking for.  Seems you don't have this functionality, I'll remove JotForm from our list of candidates to address our needs.  Thanks for your reply.

I'm not sure if you aware that you can actually download the form's source code. In this way, you can customize the HTML, CSS and Javascript files of the form. Here's a guide: How-to-get-the-Full-Source-Code-of-your-Form.

You may also embed the form using the iFrame method. Here's a guide: Getting-the-form-iFrame-code.

Hope this helps. Thank you.