In case you are interested, I created aRichtextArea widget based on TipTap, where you can attach any arbitrary Django form. This all works with the new<dialog>-HTML element and does not require any Django-admin, nor does is need an<iframe>.

Why is that important?

Consider elements, such as<a href="…">,<img src="…">,<button …>, etc. where the user must enter more than one extra field.
For example a link: This could just be the URL of an external website, but often we need many more input fields, for instance if we want to link onto objects inside our database, so that they are independent of the URL mapping. Or if we want to specify thetarget orrel attributes.

When using images in richtext, it even becomes more complicate than that. We then need a way to store the image's payload data somewhere on disk, whereas we want the metadata (width, height, alignment, etc.) inside the document. There is no one-fits-all solution for that, we want the customer to design their model describing the values they need.

In django-formset version 1.4 this will be possible. One then can create his own form definition in Python and attach it to a TipTap control element. Clicking on that button will open a dialog window with the fields declared in the mentioned form. This can be used for any kind of extra control elements inside your richtext editor. The data submitted by those dialog forms, then is merged
with the "rich" text and its payload can be stored in JSON in any database.

The latter has the advantage that no such thing as "text enabled plugins" are required anymore.

We will also have to json-ify the data bridge:#7850

From my point of view, the most important part would be the possibility to add and edit plugins into placeholder via the Django Admin. This by it self enables everyone to use the Django CMS headless by implementing the API part on it's own. This could be a good first step into a fully headlines CMS.

Quick update - in the meantime a lot of effort and progress has been made, please see djangocms-rest (https://github.com/fsbraun/djangocms-rest) and#7850 (Headless Readiness of the core) for further information.