For site builders/documentation authors
In Drupal 7, the UI for adding or re-using an existing field was stuck to the bottom of a page listing field values, creating a confusing, one-off user experience:
In Drupal 8, the Field UI has moved to standard patterns used elsewhere, with a simple "Add field" button at the top of the listing table, and then more details asked on the following form:
For module developers
If you're a module developer who previously modified the Managed Fields form (form ID: 'field_ui_field_overview_form'), you will need to adjust your code to the new form ID: 'field_ui_field_storage_add_form'. Also, the $form['#entity_type_id']
and $form['#bundle']
elements have been changed to $form_state->get('entity_type_id')
and $form_state->get('bundle')
.