TYPO3 Core

The slug generator option still uses the field "title" to generate the slug. It is not possible to define a list of fields "nav_title // title", as we know from TypoScript.

In case of SEO optimizations and the daily work of an editor, it should be possible to define a list of fields in the slug configuration.
An editor creates a new page and fills up the title and nav title. Actually the title is used to generate the slug. The behavior should be configurable with the "TCA columnsOverrides" mechanism.

TCA Example

'columns' => [
                'slug' => [
                    'config' => [
                        'generatorOptions' => [
                            'fields' => ['nav_title // title']
                        ]
                    ]
                ],

Example with defined nav_title:
Page-Title: Best summer deals
Navigation Title: Summer deals
Slug: /summer-deals (nav_title)
Slug-behavior: nav_title (is not empty) // title

Example with undefined nav_title, but title:
Page-Title: Best summer deals
Navigation Title: Summer deals
Slug: /best-summer-deals (title)
Slug-behavior: nav_title (is empty, fallback to title) // title