JavaScript API - How to read the data on the front end?

Hi everyone,

I am trying to use Bubble to create a little widget integration for another app called Missive, which is like an email inbox.

To simplify what I am trying to do, I am trying to read the From/To fields from an open email conversation and then do something with that information.

Here is a link to the JavaScript API for your reference: UI/iFrame Integrations | JavaScript API | Developer Documentation

Here is the problem

I can put the JavaScript in the body of my app and successfully read the data, but then I can’t figure out how to USE the data - For example if I fetch an array of AddressField objects - how do I use them in a repeating group?

Is this just something that is beyond the ability of Bubble?