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by neoclide

neoclide /coc.nvim

Intellisense engine for Vim8 & Neovim, full language server protocol support as VSCode

11.7K Stars 440 Forks Last release: 3 months ago (v0.0.78) MIT License 3.1K Commits 78 Releases

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Make your Vim/Neovim as smart as VSCode.

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True snippet and additional text editing support


Quick Start

Install nodejs >= 10.12:

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', {'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

:verbose imap <tab></tab>

to make sure that your keymap has taken effect.

" 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("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 <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
inoremap <silent><expr> <tab>
      \ pumvisible() ? "\<c-n>" :
      \ <sid>check_back_space() ? "\<tab>" :
      \ coc#refresh()
inoremap <expr><s-tab> pumvisible() ? "\<c-p>" : "\<c-h>"

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

" Use <c-space> to trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()

" Use <cr> to confirm completion, `<c-g>u` means break undo chain at current
" position. Coc only does snippet and additional edit on confirm.
" <cr> could be remapped by other vim plugin, try `:verbose imap <cr>`.
if exists('*complete_info')
  inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<c-y>" : "\<c-g>u\<cr>"
  inoremap <expr> <cr> pumvisible() ? "\<c-y>" : "\<c-g>u\<cr>"

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

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

" Use K to show documentation in preview window.
nnoremap <silent> K :call <sid>show_documentation()<cr>

function! s:show_documentation()
  if (index(['vim','help'], &amp;filetype) &gt;= 0)
    execute 'h '.expand('<cword>')
    call CocAction('doHover')

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

" Symbol renaming.
nmap <leader>rn <plug>(coc-rename)

" Formatting selected code.
xmap <leader>f <plug>(coc-format-selected)
nmap <leader>f <plug>(coc-format-selected)

augroup mygroup
  " 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 <leader>a <plug>(coc-codeaction-selected)
nmap <leader>a <plug>(coc-codeaction-selected)

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

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

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of LS, ex: coc-tsserver
nmap <silent> <c-s> <plug>(coc-range-select)
xmap <silent> <c-s> <plug>(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', <f-args>)

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


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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