The Facets module provides a way to easily create and manage faceted filters, which refine search results dynamically. It supports integration with both Drupal Core Search and the Search API, offering features like block-based filters and exposed filters with AJAX capabilities.
Overview
The Facets module allows site builders to easily create and manage faceted filters. Faceted filters are filters which limit themself based on the results.
Facets 3
Facets 3.x only supports Search API, and introduces "Facets exposed filters" next to "Facet blocks".
We recommend using Facets exposed filters for new projects, when using Facets + Views
Using "Facets exposed filters" in Facets 3 has full AJAX support.
Facets 3 will not support AJAX for "Facet blocks".
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This demo showcases a full blown search_api + facets setup, using facets exposed filters, with ajax, hierarchical facets, hierarchical date facets, views filters summary, views ajax summary, better exposed filters, ...
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Facets 2
Facets 2 works with Drupal Core Search and Search API.
It is kept available for existing projects using Facets 2 + Ajax as there is no upgrade path for this setup. Updating from 2 to 3 without AJAX support is possible.