Hooks and Filters

The plugin exposes action and filter hooks at every layer: the preset builder form, the settings tabs, the frontend render, and the product query.

Action Hooks

Preset Builder (admin form)

Hook	Args	Fires
`wb_ajax_filter_before_filter_fields`	`$filters`	Before the field list renders.
`wb_ajax_filter_fields`	`$filters`	Once per field while the field rows render - this is where a preset gets its filters.
`wb_ajax_filter_after_filter_fields`	`$filters`	After the last field row.

Settings Tabs (admin)

Hook	Args	Fires
`wb_ajax_filter_settings_tab_content`	`$tab_id`	Renders one tab’s body.
`wb_ajax_filter_before_admin_general_settings`	`$wb_general`	Before the filtering-behaviour form.
`wb_ajax_filter_after_admin_general_settings`	`$wb_general`	After it.
`wb_ajax_filter_before_admin_search_settings`	`$wb_search`	Before the product-search form.
`wb_ajax_filter_before_admin_search_option_settings`	`$wb_search_scope`	Before the search-scope options.
`wb_ajax_filter_after_admin_search_option_settings`	`$wb_search_scope`	After them.
`wb_ajax_filter_after_admin_search_settings`	`$wb_search`	After the product-search form.
`wb_ajax_filter_before_admin_customization_settings`	`$wb_customization`	Before the appearance form.
`wb_ajax_filter_after_admin_customization_settings`	`$wb_customization`	After it.

Frontend

Hook	Args	Fires
`wb_ajax_filter_before_content`	none	At the top of the filters container, before the title.
`wb_ajax_filter_after_content`	none	At the bottom of the filters container, after the last preset.

Filter Hooks

Hook	Args	Purpose
`wb_ajax_filter_get_preset_filters`	`$filters`, `$preset_id`	Change the filter fields a preset renders. Add new field arrays, remove existing ones, or re-order.
`wb_ajax_filter_restrict_products`	`$matched_products`	Restrict the products the search autocomplete returns.
`wb_ajax_filter_restrict_terms`	`$results`, `$taxonomy`	Restrict which taxonomy terms show as filter options in the preset builder.
`wb_ajax_filter_custom_field_search_limit`	`$limit` (default 30)	Change how many custom-field matches the search returns.
`wb_ajax_filter_show_search`	`$show_search` (bool), `$search_enabled` (bool)	Override whether (and where) the product search box renders. Default: it shows on the shop page and category/tag archives only, because the search submits against the WooCommerce product loop those pages provide.
`wb_ajax_filter_settings_nav_groups`	`$groups`	Declare or modify the admin settings navigation.

Example

Add a badge next to a taxonomy filter’s title on the frontend:

add_filter( 'wb_ajax_filter_get_preset_filters', function ( $filters, $preset_id ) {
    foreach ( $filters as &$filter ) {
        if ( 'tax' === $filter['type'] && 'product_cat' === $filter['taxonomy'] ) {
            $filter['filter_title'] = $filter['filter_title'] . ' (categories)';
        }
    }
    return $filters;
}, 10, 2 );

Show the product search box on every page where the filters render, not just the shop and archive pages:

add_filter( 'wb_ajax_filter_show_search', function ( $show_search, $search_enabled ) {
    // Only force it on when the admin has enabled search at all.
    return $search_enabled;
}, 10, 2 );

Template Overrides - restyle output without hooks.
Extending Presets - add a custom filter type end to end.