This widget is a read-only element that updates itself based on events (focus change, etc.). It should take over existing content and transform it if necessary.

The configuration for this could look as follows.

fields:
  - label: Slug
    name: slug
    widget: string
    i18n: duplicate
  - label: TranslationKey
    name: translationKey
    widget: compute
    value: posts-{{fields.slug}}