WooCommerce Jetpack Infinite Scroll example Part 2

woocommerce.php

<?php
/**
 * Workaround to prevent is_shop() from failing due to WordPress core issue
 *
 * @link https://core.trac.wordpress.org/ticket/21790
 * @param  array $args infinite scroll args.
 * @return array       infinite scroll args.
 */
function _s_woocommerce_is_shop_page() {
	global $wp_query;
	$front_page_id        = get_option( 'page_on_front' );
	$current_page_id      = $wp_query->get( 'page_id' );
	$shop_page_id         = apply_filters( 'woocommerce_get_shop_page_id', get_option( 'woocommerce_shop_page_id' ) );
	$is_static_front_page = 'page' === get_option( 'show_on_front' );
	if ( $is_static_front_page && $front_page_id === $current_page_id  ) {
		$is_shop_page = ( $current_page_id === wc_get_page_id( 'shop' ) ) ? true : false;
	} else {
		$is_shop_page = is_shop();
	}
	return $is_shop_page;
}
/**
 * Jetpack infinite scroll duplicates posts where orderby is anything other than modified or date
 * This filter offsets the products returned by however many are displayed per page
 *
 * @link https://github.com/Automattic/jetpack/issues/1135
 * @param  array $args infinite scroll args.
 * @return array       infinite scroll args.
 */
function _s_woocommerce_jetpack_duplicate_products( $args ) {
	if ( ( isset( $args['post_type'] ) && 'product' === $args['post_type'] ) || ( isset( $args['taxonomy'] ) && 'product_cat' === $args['taxonomy'] ) ) {
		$args['offset'] = $args['posts_per_page'] * $args['paged'];
	}
 	return $args;
}
add_filter( 'infinite_scroll_query_args', '_s_woocommerce_jetpack_duplicate_products', 100 );
/**
 * Override number of products per page in Jetpack infinite scroll.
 *
 * @param  array $args infinite scroll args.
 * @return array       infinite scroll args.
 */
function _s_woocommerce_jetpack_products_per_page( $args ) {
	if ( is_array( $args ) && ( _s_woocommerce_is_shop_page() || is_product_taxonomy() || is_product_category() || is_product_tag() ) ) {
		 $args['posts_per_page'] = _s_woocommerce_products_per_page();
	}
	return $args;
}
add_filter( 'infinite_scroll_settings', '_s_woocommerce_jetpack_products_per_page' );