Context
Currently using facets to provide a hierarchical select filter.
You have to select a top level item, then the filter updates with the children.
This can be confusing.
Questions
Can we add additional dropdowns when each level is selected?
Can we have a list of links for the top level?
With dependent facets, can I move them to a second row of filters, so they don't move them when expanded?
Discovery
New commits in Facets 3.x adds support for dependent facets.
Need a way to place the facets so the dependent facets that get added as you make selections don't move other filters around.
Issues
Difficulty configuring Facets Taxonomy Multilevel.
https://www.drupal.org/project/facets_taxonomy_multilevel/issues/3511228
Some issues due to order of processors.
Support for multiple level depths. (working patch)
https://www.drupal.org/project/facets_taxonomy_multilevel/issues/3516165
Facets has a recent fix for dependent facets. Currently in 3.x dev.
https://git.drupalcode.org/project/facets/-/merge_requests/394.diff
Facets 3.x is broken for drupal 10.
https://www.drupal.org/project/facets/issues/3594309
Done
Try out Facets 3.x and Facets Taxonomy Multilevel modules.
Added patch for selecting multiple levels.
Changes were experimental and not applied to the site.