WooCommerce

add_action( 'wp_footer', 'cart_update_qty_script' ); function cart_update_qty_script() { if (is_cart()) : ?> <script> jQuery('div.woocommerce').on('change', '.qty', function(){ jQuery("[name='update_cart']").removeAttr('disabled'); jQuery("[name='update_cart']").trigger("click"); }); </script> <?php endif; } Read More: https://gist.github.com/lukecav/e96f03693958bd0758a52e3a25ee48d8