Is there a way to disable syntax highlighting completely?

[joshua7v]

Feature description

Hi, the question might be a bit unusual, sorry about that.
but I wonder if I can disable the syntax highlighting completely within preview
I use syntax manual daily and don't have treesitter installed
I aslo cannot just do syntax off, because I still need something highlighted sometimes (like highlight filename in quickfix)

I tried to give setlocal syntax=off to floating windows, but with no luck to make it work.

" my setting
syntax manual
autocmd FileType dirvish,qf setlocal syntax=on

" what I tried but not work
autocmd BufWinEnter,WinNew * if nvim_win_get_config(0)['relative'] != '' | setlocal syntax=off | endif

Describe the solution you'd like

Maybe provide some suggestions? that would be very helpful.

Additional context

No response

[kevinhwang91]

You are crazy!

[joshua7v]

@kevinhwang91 LOL I know its a bit wwweird, but thanks, works great.