Adding custom field via javascript

Frappe Framework Custom Script
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1

I would like create a field (let’s say of type “Text Editor”) that is not linked to the database, as I would like to use this field for other purposes. How would I go about doing that?

2

you can use an HTML field type and then create whatever type of field in that HTML field.

3

But how about complex field types like “Text Editor”? (which is what I need for my current use case)