Allow adding hidden fields before submit

[stanislavCQ]

Hello everyone,

We'd like to add a hidden value to our typeform responses. Typeform is embedded on our website and the hidden value would include some data from user's session.

However, the actions signatures impose heavy limitations here, they only contain form / response ids, not allowing to change any data we send.

I use createWidget / createPopup calls. If I supply the hidden properties during these calls I am not able to change them later without recreating the form.

Is there a way to update these hidden values right before submit? Thank you