My Vim configurations.

.vimrc

set sts=2
set ts=2
set sw=2
set et
set number
set encoding=utf-8
syntax on
autocmd FileType * setlocal formatoptions-=c formatoptions-=r formatoptions-=o
autocmd BufReadPost,BufNewFile *.elm setfiletype haskell

I could have used https://github.com/junegunn/vim-plug together with https://github.com/ElmCast/elm-vim to highlight *.elm files syntax but its easier just to use haskell syntax instead

• There is almost nothing to highlight in the first place
• elm is basically mini haskell on the frontend
• I just need the highlighter to distinguish between comments, types, strings and keywords, nothing more than that

Keep it simple