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17.7K Stars 714 Forks MIT License 4.2K Commits 47 Opened issues


Nodejs extension host for vim & neovim, load extensions like VSCode and host language servers.

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Coc Logo

Make your Vim/Neovim as smart as VSCode.

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True snippet and additional text editing support


Quick Start

Install nodejs >= 12.12:

curl -sL | bash

For vim-plug users:

" Use release branch (recommend)
Plug 'neoclide/coc.nvim', {'branch': 'release'}

" Or build from source code by using yarn: Plug 'neoclide/coc.nvim', {'branch': 'master', 'do': 'yarn install --frozen-lockfile'}

in your

, then restart Vim and run

Checkout Install coc.nvim for more info.

You have to install coc extension or configure language servers for LSP support.

Install extensions like:

:CocInstall coc-json coc-tsserver

Or configure language server in

opened by
, like:
  "languageserver": {
    "go": {
      "command": "gopls",
      "rootPatterns": ["go.mod"],
      "trace.server": "verbose",
      "filetypes": ["go"]

Checkout wiki for more details:


:h coc-nvim
for vim interface.

Example vim configuration

Configuration is required to make coc.nvim easier to work with, since it doesn't change your key-mappings or Vim options. This is done as much as possible to avoid conflict with your other plugins.

❗️Important: Some Vim plugins could change key mappings. Please use command like

:verbose imap 
to make sure that your keymap has taken effect.
" Set internal encoding of vim, not needed on neovim, since coc.nvim using some
" unicode characters in the file autoload/float.vim
set encoding=utf-8

" TextEdit might fail if hidden is not set. set hidden

" Some servers have issues with backup files, see #649. set nobackup set nowritebackup

" Give more space for displaying messages. set cmdheight=2

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable " delays and poor user experience. set updatetime=300

" Don't pass messages to |ins-completion-menu|. set shortmess+=c

" Always show the signcolumn, otherwise it would shift the text each time " diagnostics appear/become resolved. if has("nvim-0.5.0") || has("patch-8.1.1564") " Recently vim can merge signcolumn and number column into one set signcolumn=number else set signcolumn=yes endif

" Use tab for trigger completion with characters ahead and navigate. " NOTE: Use command ':verbose imap ' to make sure tab is not mapped by " other plugin before putting this into your config. inoremap \ pumvisible() ? "<c-n>" : \ check_back_space() ? "<tab>" : \ coc#refresh() inoremap pumvisible() ? "<c-p>" : "<c-h>"

function! s:check_back_space() abort let col = col('.') - 1 return !col || getline('.')[col - 1] =~# '\s' endfunction

" Use to trigger completion. if has('nvim') inoremap coc#refresh() else inoremap coc#refresh() endif

" Make auto-select the first completion item and notify coc.nvim to " format on enter, could be remapped by other vim plugin inoremap pumvisible() ? coc#_select_confirm() : "<c-g>u<cr><c-r>=coc#on_enter()<cr>"

" Use [g and ]g to navigate diagnostics " Use :CocDiagnostics to get all diagnostics of current buffer in location list. nmap [g (coc-diagnostic-prev) nmap ]g (coc-diagnostic-next)

" GoTo code navigation. nmap gd (coc-definition) nmap gy (coc-type-definition) nmap gi (coc-implementation) nmap gr (coc-references)

" Use K to show documentation in preview window. nnoremap K :call show_documentation()

function! s:show_documentation() if (index(['vim','help'], &filetype) >= 0) execute 'h '.expand('') elseif (coc#rpc#ready()) call CocActionAsync('doHover') else execute '!' . &keywordprg . " " . expand('') endif endfunction

" Highlight the symbol and its references when holding the cursor. autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming. nmap rn (coc-rename)

" Formatting selected code. xmap f (coc-format-selected) nmap f (coc-format-selected)

augroup mygroup autocmd! " Setup formatexpr specified filetype(s). autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected') " Update signature help on jump placeholder. autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp') augroup end

" Applying codeAction to the selected region. " Example: <leader>aap for current paragraph xmap a (coc-codeaction-selected) nmap a (coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer. nmap ac (coc-codeaction) " Apply AutoFix to problem on the current line. nmap qf (coc-fix-current)

" Map function and class text objects " NOTE: Requires 'textDocument.documentSymbol' support from the language server. xmap if (coc-funcobj-i) omap if (coc-funcobj-i) xmap af (coc-funcobj-a) omap af (coc-funcobj-a) xmap ic (coc-classobj-i) omap ic (coc-classobj-i) xmap ac (coc-classobj-a) omap ac (coc-classobj-a)

" Remap and for scroll float windows/popups. if has('nvim-0.4.0') || has('patch-8.2.0750') nnoremap coc#float#has_scroll() ? coc#float#scroll(1) : "<c-f>" nnoremap coc#float#has_scroll() ? coc#float#scroll(0) : "<c-b>" inoremap coc#float#has_scroll() ? "<c-r>=coc#float#scroll(1)<cr>" : "<right>" inoremap coc#float#has_scroll() ? "<c-r>=coc#float#scroll(0)<cr>" : "<left>" vnoremap coc#float#has_scroll() ? coc#float#scroll(1) : "<c-f>" vnoremap coc#float#has_scroll() ? coc#float#scroll(0) : "<c-b>" endif

" Use CTRL-S for selections ranges. " Requires 'textDocument/selectionRange' support of language server. nmap (coc-range-select) xmap (coc-range-select)

" Add :Format command to format current buffer. command! -nargs=0 Format :call CocAction('format')

" Add :Fold command to fold current buffer. command! -nargs=? Fold :call CocAction('fold', )

" Add :OR command for organize imports of the current buffer. command! -nargs=0 OR :call CocAction('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support. " NOTE: Please see :h coc-status for integrations with external plugins that " provide custom statusline: lightline.vim, vim-airline. set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList " Show all diagnostics. nnoremap a :CocList diagnostics " Manage extensions. nnoremap e :CocList extensions " Show commands. nnoremap c :CocList commands " Find symbol of current document. nnoremap o :CocList outline " Search workspace symbols. nnoremap s :CocList -I symbols " Do default action for next item. nnoremap j :CocNext " Do default action for previous item. nnoremap k :CocPrev " Resume latest coc list. nnoremap p :CocListResume


Trouble shooting

Try these steps when you have problem with coc.nvim.

  • Make sure your Vim version >= 8.0 by command
  • If service failed to start, use command
    on Neovim.
  • Checkout the log of coc.nvim by command
  • When you have issues with the language server, it's recommended to checkout the output.



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