generates an application with jQuery. The -j option of the generator lets you choose Prototype and Scriptaculous instead: Such an application does not have RJS yet available though. From now on prototype-rails is needed for RJS, see below. Upgrading Applications Using No RJS Existing applications using no RJS should remove any references to ActionView::Base.debug_rjs in the project. Typically that
![jQuery: New Default](https://cdn-ak-scissors.b.st-hatena.com/image/square/5dbf8d4bb6aeb72c4906093e54727da9571cbd97/height=288;version=1;width=512/https%3A%2F%2Frubyonrails.org%2Fassets%2Fimages%2Fopengraph.png)