I am using iron.nvim and have these hotkeys:
vmap <F2> <Plug>(iron-visual-send)
nmap <F2> <Plug>(iron-send-line)
nnoremap <leader>is :IronRepl<CR>
nnoremap <leader>ir :IronRestart<CR><C-w>p<C-W>L<C-w>p
Now, with \is I can start new julia REPL and with F2 send either line or visual selection to REPL. It is very convenient, I even made small ascii video about it: untitled - asciinema
This is easy to setup and easy to use. No need for IDE anymore 