My config of COC vim

.vimrc

" ________________ COC.NVIM ________
let g:coc_global_extensions = ['coc-json',
      \ 'coc-git',
      \ 'coc-snippets',
      \ 'coc-tsserver',
      \ 'coc-eslint',
      \ 'coc-rust-analyzer',
      \ 'coc-cssmodules',
      \ 'coc-marketplace',
      \ 'coc-java',
      \ ]
" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
      \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

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

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

" GoTo code navigation
set tagfunc=CocTagFunc
nmap <silent> gT <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 ShowDocumentation()<CR>

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  endif
endfunction

" Symbol renaming
nmap rn <Plug>(coc-rename)

" Formatting selected code
xmap <leader>f  <Plug>(coc-format-selected)

function! s:eslint_or_format() abort
  let l:filetypes = ["typescript", "typescriptreact", "javascript", "javascriptreact"]
  if index(l:filetypes, &filetype) >= 0
    execute "CocCommand eslint.executeAutofix"
  else
    execute "call CocActionAsync('format')"
  endif
endfunction

nnoremap <expr> <silent> <leader>f <sid>eslint_or_format()

" Applying code actions to the selected code block
" Example: `<leader>aap` for current paragraph
xmap ga  <Plug>(coc-codeaction-selected)
nmap ga  <Plug>(coc-codeaction)

" Apply the most preferred quickfix action to fix diagnostic on the current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Remap keys for applying refactor code actions
xmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)
nmap <silent> <leader>r  <Plug>(coc-codeaction-refactor)

" Run the Code Lens action on the current line
nmap <leader>cl  <Plug>(coc-codelens-action)

" 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)

" Remap <C-f> and <C-b> to scroll float windows/popups
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-d> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-d>"
  nnoremap <silent><nowait><expr> <C-u> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-u>"
  inoremap <silent><nowait><expr> <C-d> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<C-d>"
  inoremap <silent><nowait><expr> <C-u> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<C-u>"
  vnoremap <silent><nowait><expr> <C-d> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-d>"
  vnoremap <silent><nowait><expr> <C-u> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-u>"
endif


" 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=%f
set statusline+=\ %{coc#status()}%{get(b:,'coc_current_function','')}
set statusline+=%=
set statusline+=%y

" Manipulate hunks
nnoremap <silent><nowait> <leader>hp :CocCommand git.chunkInfo<cr>
nnoremap <silent><nowait> <leader>hs :CocCommand git.chunkStage<cr>
nnoremap <silent><nowait> <leader>hS :Gwrite<cr>
nnoremap <silent><nowait> <leader>hu :CocCommand git.chunkUnstage<cr>
nnoremap <silent><nowait> <leader>hU :CocCommand git.chunkUndo<cr>
nnoremap <silent><nowait> <leader>hc :Git commit -v --no-verify<cr>
nnoremap <silent><nowait> <leader>ha :Git commit --amend -v --no-verify<cr>
nnoremap ]c <Plug>(coc-git-nextchunk)
nnoremap [c <Plug>(coc-git-prevchunk)

" Snippets
let g:coc_snippet_next = '<c-k>'
let g:coc_snippet_prev = '<c-j>'

" Use <C-k> for both expand and jump (make expand higher priority.)
inoremap <C-k> <Plug>(coc-snippets-expand-jump)

" Use <leader>x for convert visual selected code to snippet
xmap <leader>x  <Plug>(coc-convert-snippet)

" Show all diagnostics
nnoremap <silent><nowait> <leader>q  :<C-u>CocDiagnostics<cr>
" Show commands
nnoremap <silent><nowait> <leader>oc  :<C-u>CocList commands<cr>
" Find symbol of current document
nnoremap <silent><nowait> <leader>ds  :<C-u>CocList outline<cr>
" Search workspace symbols
nnoremap <silent><nowait> <leader>ws  :<C-u>CocList -I symbols<cr>