djrmom

<?php
/** 'author' is Unique name set in advanced tab of layout builder settings for the item,
 ** loop over the array returned from ACF to build a html string from the subfields and return to layout builder's
 ** facetwp_builder_item_value filter
 **/

add_filter( 'facetwp_builder_item_value', function( $value, $item ) {
	if ( 'author' == $item['settings']['name'] ) {
		$value = '';
		$authors = get_field( 'author' );

djrmom

Radio button facets are actual divs rather than radio input type html.

Radio facet as rectangular buttons - https://d.pr/i/cnyjEg
Facet settings for demo - https://d.pr/i/C5lAsc
If you want to add an "All" button - https://gist.github.com/djrmom/5870f7baf38fd5df40ee861bb95a01d5

djrmom

<?php

/**
 * reindex after adding or updating this filter
 */
add_filter( 'facetwp_index_row', function( $params, $class ) {
	if ( 'date_as_year' == $params['facet_name'] ) { // change date_as_year to name of your facet
		$raw_value = $params['facet_value'];
		$params['facet_value'] = date( 'Y', strtotime( $raw_value ) );
		$params['facet_display_value'] = $params['facet_value'];

djrmom

<?php
return array(
    'post_type' => 'product',
    'meta_query' => array(
        array(
          'key' => '_wc_booking_availability',
          'compare' => 'EXISTS'
        )
    )
);

djrmom

<?php

/** removes () from count, could also be used to replace with alternate bracketing or other output **/

add_filter( 'facetwp_facet_html', function( $output, $params ) {
	if ( 'product_categories' == $params['facet']['name'] ) {
		$output = preg_replace( '/\(([0-9]+)\)/', '$1', $output );
	}
	return $output;
}, 10, 2 );

djrmom

<?php

/** scoll on loaded only if pager is the change in facet **/
add_action( 'wp_head', function() { ?>

    <script>
        (function($) {
            $(document).on('facetwp-refresh', function() {
                if ( FWP.soft_refresh == true ) {
                    FWP.enable_scroll = true;

djrmom

<?php

/** reset a facet (facet 2) on submission of different facet (facet 1)
 ** change 'search' to name of facet 1
 ** change 'product_categories' to the name of the facet 2
 **/
add_action( 'wp_footer', function() {
	?>
    <script>
        (function($) {

djrmom

<?php
/** index only first level children terms, no grandchildren or deeper **/
add_filter( 'facetwp_index_row', function( $params ) {
    if ( 'product_categories' == $params['facet_name'] ) { //change 'product_categories' to name of your facet
		$parents = get_ancestors( $params['term_id'], 'product_cat', 'taxonomy' ); // change 'product_cat' to name of your taxonomy
		if ( count( $parents ) !== 1 ) { // adjust comparison as needed for different child levels
			$params['facet_value'] = ''; // skip indexing
		}
	}
	return $params;

djrmom

<?php
/** some types of product attributes for woocommerce (those that are not taxonomies or used for variations
 ** are saved only in the _product_attributes custom field as an array
 ** select "_product_attributes" as the datasource in the facet and use facetwp_index_row to find and index
 ** the correct attributes
 **/

add_filter( 'facetwp_index_row', function( $params, $class ) {
    if ( 'attributes' == $params['facet_name'] ) { //change 'attributes' to name of your facet
        $values = maybe_unserialize( $params['facet_value'] );

djrmom

<?php
/** order by facet value (value shown in url on selection) instead of display value (label) **/

add_filter( 'facetwp_facet_orderby', function( $orderby, $facet ) {
    if ( 'day_of_week' == $facet['name'] ) {
        $orderby = 'FIELD(f.facet_value, "monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday")';
    }
    return $orderby;
}, 10, 2 );