I need to inject a JS script into product pages than when changing the configurable option dropdown will give me the new simple products SKU inside the JS.
This is going to be added into an existing module.
Getting the SKU information programatically is ok, and originally I thought about extending configurable.phtml but then looked at how many sites I've build that have overwritten configurable so I don't want to do this.
Where would be the best place to inject this where I can get the product information I need and watch for the select box change?