.html extension for products in wordpress and woocommerce

Hi,

I got success with below code

function wpse_178112_permastruct_html( $post_type, $args ) {
    if ( $post_type === 'product' )
        add_permastruct( $post_type, "{$args->rewrite['slug']}/%$post_type%.html", $args->rewrite );
}

add_action( 'registered_post_type', 'wpse_178112_permastruct_html', 10, 2 );

https://presta-addons-modules.tk/addons/home-page-popup-advertisement-based-on-selected-languages.html

-Thanks
Shahab