Deoplete-emoji offers asynchronous completion of emoji codes. You can add emoji to your document by writing :EMOJICODE:.
For a full list of available emoji and codes, see emoji table.
To install deoplete-emoji, use your favorite Neovim plugin manager.
Using vim-plug
Plug 'Shougo/deoplete.nvim', {'do': ':UpdateRemotePlugins'}
Plug 'fszymanski/deoplete-emoji'For more information, see :help deoplete_emoji.txt.