I use Sublime and VS Code for Elixir and Phoenix development. Both of these editors provide a nice syntax highlighting. But when it comes to the code completion, it’s not very intelligent by using the vscode-elixir package for VS Code and Elixir package for Sublime.
I came across ElixirSense, it looks very promising thing for code completion, but I don’t know if the packages for these two text editors by default use ElixirSense under the hood, or I will need to manually configure it and setup ElixirSense for it.
BTW ElixirSense needs to be run manually as elixir run.exs socket_type port env as mentioned on it’s github repo. But I don’t know how in that case will sublime or VS Code detect it.