Elixir + Phoenix/Phoenix LiveView is very good at this. LiveView lets you change state on the server, and have it reflected on the client. Or, when the client d

Elixir + Phoenix/Phoenix LiveView is very good at this. LiveView lets you change state on the server, and have it reflected on the client. Or, when the client does an action, do something on the server (that can then trigger another state change on the client, etc). All of this is purely using Elixir - no need to write JS 99% of the time.