Ajax add to cart for variable products

I heard WooCommerce 2.1 makes things easy for implementing Ajax add to cart feature for variable products. Can any one help me to implement it ?

I have successfully implemented for single product using this tut – http://snippets.webaware.com.au/snippets/woocommerce-add-to-cart-with-quantity-and-ajax/

https://wordpress.org/plugins/woocommerce/