Last Friday, Phoenix LiveView was publicly released, allowing you to create cool applications that live update the frontend code without you writing any Javascript. This video and post cover how to set up an Elixir application for Phoenix LiveView and then how to create a counter that you can increment and decrement with all the state managed in the backend.

https://dennisbeatty.com/2019/03/19/how-to-create-a-counter-with-phoenix-live-view.html