Skip to content
Intellisense engine for vim8 & neovim, full language server protocol support as VSCode
Branch: master
Clone or download
Type Name Latest commit message Commit time
Failed to load latest commit information.
.github/ISSUE_TEMPLATE chore(github): improve bug_report Mar 22, 2019
bin feat(plugin): Use compiled javascript replace binary release Mar 31, 2019
data feat(services): add additionalSchemes support Apr 15, 2019
doc feat(handler): support jumpCommand as false Apr 20, 2019
plugin chore(events): add bufnr to InsertEnter event Apr 15, 2019
src chore(package): update dependencies Apr 22, 2019
.ignore fix diagnostic, lint issues Jun 29, 2018
.npmignore fix(bin): not add bin to .npmignore Oct 31, 2018
.travis.yml feat(plugin): decouple with unnecessary sources Nov 23, 2018 chore(doc): add Backers Apr 2, 2019 refactor compltetion Jun 16, 2018 Release v0.0.65 Apr 9, 2019
install.cmd install.cmd: use -NoProfile for powershell (#671) Apr 8, 2019 feat(install): install from release branch Apr 3, 2019
jest.js fix(test): fix fail of integration test Dec 26, 2018
package.json chore(package): update dependencies Apr 22, 2019 feat(install): install from release branch Apr 3, 2019
tsconfig.json feat(plugin): Use compiled javascript replace binary release Mar 31, 2019
tslint.json chore(lint): fix floating promise Apr 3, 2019
webpack.config.js feat(plugin): add REVISION to CocInfo Apr 3, 2019
yarn.lock chore(package): update dependencies Apr 22, 2019

Coc Logo

Make your vim/neovim as smart as VSCode.

Software License Bountysource Travis Coverage Doc Gitter

Coc is an intellisense engine for vim8 & neovim.

It works on vim >= 8.1 and neovim >= 0.3.1.

It's a completion framework and language server client which supports extension features of VSCode


True snippet and additional text editing support

Floating windows require the master build of neovim to work, follow steps in the faq.

Check out doc/coc.txt for the vim interface.


Completion experience

You might be wondering why yet another completion engine since there is the already widely used [YouCompleteMe]( and [deoplete.nvim](

Below are the reasons that led coc.nvim to build its own engine:

  • Full LSP completion support, especially snippet and additionalTextEdit feature, you'll understand why it's awesome when you experience it with a coc extension like coc-tsserver.
  • Asynchronous and parallel completion request, unless using vim sources, your vim will never be blocked.
  • Does completion resolving on completion item change. The details from completion items are echoed after being selected, this feature requires the CompleteChanged autocmd to work.
  • Incomplete request and cancel request support, only incomplete completion requests would be triggered on filtering completion items and cancellation requests are sent to servers only when necessary.
  • Start completion without timer. The completion will start after you type the first letter of a word by default and is filtered with new input after the completion has finished. Other completion engines use a timer to trigger completion so you always have to wait after the typed character.
  • Realtime buffer keywords. Coc will generate buffer keywords on buffer change in the background (with debounce), while some completion engines use a cache which isn't always correct. Plus, Locality bonus feature from VSCode is enabled by default.
  • Filter completion items when possible. When you do a fuzzy filter with completion items, some completion engines will trigger a new completion, but coc.nvim will filter the items when possible which makes it much faster. Filtering completion items on backspace is also supported.

Table of contents

Completion sources

Completion from words in buffers and file paths completions are supported by default.

For other completion sources, check out:

Or you can create a custom source.


Extensions are more powerful than a configured language server. Checkout Using coc extensions.

Plus more! To get a full list of coc extensions, search coc.nvim on npm.

Note: use :CocConfig to edit the configuration file. Completion & validation are supported after coc-json is installed.

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 keymapping. Use a command like :verbose imap <tab> to make sure your keymap takes effect.

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

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

" Better display for messages
set cmdheight=2

" Smaller updatetime for CursorHold & CursorHoldI
set updatetime=300

" don't give |ins-completion-menu| messages.
set shortmess+=c

" always show signcolumns
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
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.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

" Use `[c` and `]c` to navigate diagnostics
nmap <silent> [c <Plug>(coc-diagnostic-prev)
nmap <silent> ]c <Plug>(coc-diagnostic-next)

" Remap keys for gotos
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'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
    call CocAction('doHover')

" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')

" Remap for rename current word
nmap <leader>rn <Plug>(coc-rename)

" Remap for format selected region
vmap <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

" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
vmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap for do codeAction of current line
nmap <leader>ac  <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf  <Plug>(coc-fix-current)

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

" Use `:Fold` to fold current buffer
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add diagnostic info for
let g:lightline = {
      \ 'colorscheme': 'wombat',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'cocstatus', 'readonly', 'filename', 'modified' ] ]
      \ },
      \ 'component_function': {
      \   'cocstatus': 'coc#status'
      \ },
      \ }

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


❤️ coc.nvim? Help us keep it alive by donating funds😘!

oblitum free-easy ruanyl robjuffermans iamcco phcerdan sarene robtrac raidou tomspeak taigacute weirongxu tbo darthShadow


You can’t perform that action at this time.