source: extendable/1.0.8/functions.php

<?php
/**
 * Extendable functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package Extendable
 * @since Extendable 1.0
 */

if ( ! function_exists( 'extendable_support' ) ) :

        /**
         * Sets up theme defaults and registers support for various WordPress features.
         *
         * @since Extendable 1.0
         *
         * @return void
         */
        function extendable_support() {

                // Add support for block styles.
                add_theme_support( 'wp-block-styles' );

                // Enqueue editor styles.
                add_editor_style( 'style.css' );

                // Register WooCommerce theme features.
                add_theme_support( 'wc-product-gallery-zoom' );
                add_theme_support( 'wc-product-gallery-lightbox' );
                add_theme_support( 'wc-product-gallery-slider' );
                add_theme_support(
                        'woocommerce',
                        array(
                                'thumbnail_image_width' => 400,
                                'single_image_width'    => 600,
                        )
                );

        }

endif;

add_action( 'after_setup_theme', 'extendable_support' );

if ( ! function_exists( 'extendable_styles' ) ) :

        /**
         * Enqueue styles.
         *
         * @since Extendable 1.0
         *
         * @return void
         */
        function extendable_styles() {

                // Register theme stylesheet.
                $theme_version = wp_get_theme()->get( 'Version' );

                $version_string = is_string( $theme_version ) ? $theme_version : false;
                wp_register_style(
                        'extendable-style',
                        get_template_directory_uri() . '/style.css',
                        array(),
                        $version_string
                );

                // Enqueue theme stylesheet.
                wp_enqueue_style( 'extendable-style' );

        }

endif;

add_action( 'wp_enqueue_scripts', 'extendable_styles' );

/**
 * Registers pattern categories.
 *
 * @since Extendable 1.0
 *
 * @return void
 */
function extendable_register_pattern_categories() {
        $block_pattern_categories = array(
                'header' => array( 'label' => __( 'Headers', 'extendable' ) ),
                'footer' => array( 'label' => __( 'Footers', 'extendable' ) ),
        );

        /**
         * Filters the theme block pattern categories.
         *
         * @since Extendable 1.0
         *
         * @param array[] $block_pattern_categories {
         *     An associative array of block pattern categories, keyed by category name.
         *
         *     @type array[] $properties {
         *         An array of block category properties.
         *
         *         @type string $label A human-readable label for the pattern category.
         *     }
         * }
         */
        $block_pattern_categories = apply_filters( 'extendable_block_pattern_categories', $block_pattern_categories );

        foreach ( $block_pattern_categories as $name => $properties ) {
                if ( ! WP_Block_Pattern_Categories_Registry::get_instance()->is_registered( $name ) ) {
                        register_block_pattern_category( $name, $properties );
                }
        }

}
add_action( 'init', 'extendable_register_pattern_categories', 9 );

if ( ! function_exists( 'is_woocommerce_activated' ) ) {
        // This theme does not have a traditional sidebar.
        remove_action( 'woocommerce_sidebar', 'woocommerce_get_sidebar', 10 );

        /**
         * Alter the queue for WooCommerce styles and scripts.
         *
         * @since Extendable 1.0.5
         *
         * @param array $styles Array of registered styles.
         *
         * @return array
         */
        function extendable_woocommerce_enqueue_styles( $styles ) {
                // Get a theme version for cache busting.
                $theme_version = wp_get_theme()->get( 'Version' );
                $version_string = is_string( $theme_version ) ? $theme_version : false;

                // Add Extendable's WooCommerce styles.
                $styles['extendable-woocommerce'] = array(
                        'src'     => get_template_directory_uri() . '/assets/css/woocommerce.css',
                        'deps'    => '',
                        'version' => $version_string,
                        'media'   => 'all',
                        'has_rtl' => true,
                );

                return apply_filters( 'woocommerce_extendable_styles', $styles );
        }
        add_filter( 'woocommerce_enqueue_styles', 'extendable_woocommerce_enqueue_styles' );
}