Toggling of both the quickfix and location list no longer works. The windows are opened properly, but are no longer closed. I bisected this down to Vim patch 8.1.0877.

I was using this plug I found some time ago until finding your lovely alternative:

function! toggle#GetBufferList()
  redir =>buflist
  silent! ls
  redir END
  return buflist
endfunction

function! toggle#ToggleList(bufname, pfx)
  let buflist = toggle#GetBufferList()
  for bufnum in map(filter(split(buflist, '\n'), 'v:val =~ "'.a:bufname.'"'), 'str2nr(matchstr(v:val, "\\d\\+"))')
    if bufwinnr(bufnum) != -1
      exec(a:pfx.'close')
      return
    endif
  endfor
  if a:pfx == 'l' && len(getloclist(0)) == 0
    echohl ErrorMsg
    echo "Location List is Empty."
    return
  endif
  let winnr = winnr()
  exec(a:pfx.'open')
  if winnr() != winnr
    wincmd p
  endif
endfunction

The thing I miss is the error message that alerts you that the list is empty.
Not sure if you'd be cool with adding something like that or not?

I'm starting to use tabs (yes, whether tabs are useful or not is debatable....). In any event, I if I have more than one QF open, e.g. one on each tab, the QToggle does not seem to be able to close any of them. Calling :cclose directly does seem to work, so I'm, perplexed. along this same line, I'd actually like :QToggle to close all QF windows in all tabs, but that might be controversial, so I'd just be happy if it just succesfully closed the QF for the current tab.

Is there a way to prevent the plugin from mapping the keys for location and quickfix? Or perhaps changing them to something else?

Cheers

Hi. I just set up your plugin and I've noticed that whenever I click on an error in the location list after bringing it up with the ListToggle key I've assigned, the location list closes after jumping to the position of the error. Afterwards, pressing the ListToggle key doesn't bring the list back up. The only way I seem to be able to get it to reappear is by manually running :lclose, then striking the key again.