gistfile1.txt

add_filter( 'elementor/frontend/widget/before_render', function( $widget ) 
{
    // Only target specific widget types if needed
    if ( $widget->get_name() !== 'property-availability' ) {
        return;
    }

    // Get current post ID
    $post_id = get_the_ID();

    // Get custom taxonomy term
    $terms = get_the_terms( $post_id, 'availability' );
    if ( is_wp_error( $terms ) || empty( $terms ) ) {
        return;
    }

    // Get first term slug or name
    $term_slug = sanitize_title( $terms[0]->name );

    // Add attribute to the widget wrapper
    $widget->add_render_attribute( '_wrapper', 'data-availability', $term_slug );
}, 10 );