jeremymoseley

Your wp-config.php likely has WP_DEBUG set to true. If you change it to false until the next release it will hide the notices.

Thank you Jordy. Initially I copied woocommerce/assets/js/frontend/add-to-cart-variation.js then unregistered the WooCommerce version and registered my version with the added the srcset modifications. Then I realized that I don’t want to check for changes every update, so I ended up with what is currently posted. To get it to work out of the box with WooCommerce I think they would need to load hidden images of all the product variations, then just display the selected variation. As it is now, the image attributes are just replaced.

I will post a new thread!

I ran into this same issue. I really wanted to use picturefill for an image heavy website to avoid the double loading of retina.js. I was able to fix it by listening for changes to the product image and updating the srcset. I ended up created a plugin Picturefill fix for WooCommerce in case others wanted an easy way to get it working.