Only load coc.nvim when compatible

vimrc

@@ -47,7 +47,6 @@ set autoindent
 set autoread
 set background=dark
 set backspace=indent,eol,start
-set cmdheight=2
 set colorcolumn=101
 set directory=$TEMP//,/tmp//,.
 set display+=lastline
@@ -118,24 +117,6 @@ if has("eval")
 		set t_Co=16
 	endif
 	colorscheme PaperColor
-
-	" 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'
-	endfunction
-
-	inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
-		\: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
-
 endif
 
 "=============================================================================
@@ -180,6 +161,26 @@ else
 	set signcolumn=yes
 endif
 
+if has("patch-8.1.1719") && executable("nodejs")
+	packadd coc.nvim
+	" 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'
+	endfunction
+
+	inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
+		\: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
+endif
+
 if has("printer")
 	set printheader=%t%h%m%=Page\ %N
 	set printoptions=paper:A4,number:y,syntax:n