Vim: Close the buffer of all Vim terminals (Vim's built-in terminals).

vim_close_all_vim_terminals.vim

" Language: Vim script
" Author: James Cherti 
" URL: https://gist.github.com/jamescherti/d552078af417a9c3c84c71d7db30f06a
" License: MIT
" Description: Close the buffer of all Vim terminals (Vim's built-in terminals)

function! CloseAllTerminals() abort
  let l:buflist = getbufinfo()
  for l:buf in l:buflist
    if getbufvar(l:buf.bufnr, '&buftype', '') ==# 'terminal'
      execute 'bdelete! ' . l:buf.bufnr
    endif
  endfor
endfunction