As of jQuery 3.0, .bind() has been deprecated. It was superseded by the .on() method for attaching event handlers to a document since jQuery 1.7, so its use was already discouraged.
Since jQuery 1.7 or higher is included in the required WordPress version this seems like a safe and sane change.
wc_cart_hash was used as a key for localStorage
for all WooCommerce sites. If you were to load your
cart for two different sites in the same browser,
the two WooCommerce pages would contend over this key
and loop on trying to set this key in the localStorage
This commit prepends the site's ajax URL onto the wc_cart_hash
key name in localStorage, providing a unique key for each
WooCommerce site. This ends contention over the keys.
If there are more variations than the threshold allows (set to 20
currently) this loads the matching variation via ajax instead of inline
in the HTML. #8477
For a more detailed explaination of why this is helpful, see
Issue #4202. In short, from a dev ops perspective, if we want to build /
concatonate our front end scripts into a single application.js file, we
need to ensure scripts first check for dependent global object helpers
before trying to use them. For example, there are several objects
(created via PHP using `wp_localize_script`) which generate objects such
as `wc_single_product_params`. These objects will not exist on most
other pages, however these scripts attempt to execute code that
references these objects.