There is a migration guide detailing all of the changes in JS: http://foundation.zurb.com/docs/upgrading.html http://foundation.zurb.com/docs/upgrading.html a

There is a migration guide detailing all of the changes in JS: http://foundation.zurb.com/docs/upgrading.html http://foundation.zurb.com/docs/upgrading.html as well as a migration plugin that will allow you to use the f4 style js and get deprecation warnings via the console: https://github.com/zurb/foundation-migrate https://github.com/zurb/foundation-migrate