LiveView is evolving into a great piece of tech, but as others have noted elsewhere in the comments one of the challenging parts with LiveView right now (and to an extent Phoenix) is the outdated books & tutorials.

Bruce Tate and Sophie DeBenedetto have been authoring the book “Programming Phoenix LiveView” (https://pragprog.com/titles/liveview/programming-phoenix-liv...) which has the potential to be a great source for people that want to really dive into LiveView. The challenge though is they have not updated it to support the changes introduced in 0.18.0 which makes it really hard to start using the book when a new Phoenix application “mix phx.new dev_app” looks different than what’s in their book and some of their code breaks with the default installed versions of included plugs.

While I wish the book would receive an update sooner that brings it back to a compatible state (meaning there are no issues following along with the book), the good news is they have committed to having the book be updated when LiveView hits 1.0.