facetwp preselect

custom-hooks.php

<?php

add_filter( 'facetwp_preload_url_vars', function( $url_vars ) {
    if ( 'demo/cars' == FWP()->helper->get_uri() ) {
        if ( empty( $url_vars['make'] ) && empty( $url_vars['other_facet'] ) ) {
            $url_vars['make'] = array( 'audi' );
            $url_vars['other_facet'] = array( 'something' );
        }
    } elseif ( 'demo/otherpage' == FWP()->helper->get_uri() ) {
        if ( empty( $url_vars['make'] ) && empty( $url_vars['other_facet'] ) ) {
            $url_vars['make'] = array( 'audi' );
            $url_vars['other_facet'] = array( 'something' );
        }
    }
    return $url_vars;
} );