[vim/vim] Vim's background turns opaque in new Windows Terminal (#7147)

[Chaoticsys101]

Instructions: Open Vim in Windows Terminal

Describe the bug
I use the new Windows Terminal with Vim.
It becomes totally opaque when I enter vim...
I think it has something to do with my _vimrc because if I do 'vim -u NONE -U NONE' it looks as it is supposed to.

Expected behavior
Windows Terminal's background shouldn't change.

Screenshots

Environment (please complete the following information):

• Vim version: 8.2.1818
• OS: Windows 10
• Terminal: Windows Terminal 1.3.2651.0

Additional context

• • • • • • _VIMRC - - - - - -
            " ---------------------------------------------------------------------"
            " ---------------- ADD PLUGINS ----------------------------------------"
            " ---------------------------------------------------------------------"
            " --- Vim-Plug ---
            call plug#begin('~/vimfiles/autoload')
            " Plugins
            Plug 'preservim/nerdtree'
            Plug 'itchyny/lightline.vim'
            Plug 'majutsushi/tagbar'
            Plug 'preservim/nerdcommenter'
            Plug 'miyakogi/conoline.vim'
            Plug 'tpope/vim-surround'
            Plug 'pseewald/vim-anyfold'
            Plug 'xolox/vim-misc'
            Plug 'xolox/vim-notes'
            Plug 'tpope/vim-repeat'
            Plug 'wfxr/minimap.vim'
            Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
            Plug 'junegunn/fzf.vim'
            Plug 'ervandew/supertab'
            Plug 'ryanoasis/vim-devicons'
            Plug 'dhruvasagar/vim-table-mode'
            Plug 'neoclide/coc.nvim', {'branch': 'release'}
            Plug 'SirVer/ultisnips'
            Plug 'honza/vim-snippets'
            Plug 'lervag/vimtex'
            " Themes
            Plug 'chriskempson/base16-vim'
            Plug 'dracula/vim', { 'as': 'dracula' }
            Plug 'morhetz/gruvbox'
            Plug 'joshdick/onedark.vim'
            Plug 'sonph/onehalf', {'rtp': 'vim/'}
            Plug 'ayu-theme/ayu-vim'
            Plug 'arcticicestudio/nord-vim'
            Plug 'rakr/vim-one'
            Plug 'sheerun/vim-wombat-scheme'
            Plug 'lifepillar/vim-solarized8'
            Plug 'flazz/vim-colorschemes'
            Plug 'colepeters/spacemacs-theme.vim'
            Plug 'phanviet/vim-monokai-pro'
            call plug#end()

" ---------------------------------------------------------------------"
" ---------------- PLUGIN SETTINGS ------------------------------------"
" ---------------------------------------------------------------------"
" --- Define mapleader for keymaps ---
let mapleader = " "

" --- For NERDTree ---
map n :NERDTreeToggle

" --- For Tagbar ---
nmap :TagbarToggle

" --- For lightline ---
set laststatus=2
" let g:lightline.colorscheme = 'default'

" --- For NERDCommenter ---
" cc to comment
" cu to uncomment
let NERDSpaceDelims=1

" --- For Conoline ---
let g:conoline_auto_enable = 1
let g:conoline_color_normal_dark = 'ctermbg=None'
let g:conoline_color_insert_dark = 'ctermbg=None'
let g:conoline_color_normal_nr_dark = 'ctermbg=None ctermfg=white'
let g:conoline_color_insert_nr_dark = 'ctermbg=None ctermfg=white'

" --- For creating presentations in vim (use Goyo plugin) ---
autocmd BufNewFile,BufRead *.vpm call SetVimPresentationMode()
function SetVimPresentationMode()
set laststatus=0
hi NonText guifg=bg ctermfg=bg
set nonu
DisableWhitespace
nnoremap :n
nnoremap :N
endfunction

" --- For vim-anyfold ---
autocmd Filetype * AnyFoldActivate
let g:anyfold_fold_toplevel=0
set foldlevel=99

" --- For minimap ---
let g:minimap_width=14
nnoremap m :MinimapToggle

" --- For fzf ---
let g:fzf_layout = { 'down': '~40%' }

" --- For SuperTab ---
let g:SuperTabDefaultCompletionType = ""

" --- For vimtex ---
let g:tex_flavor='latex'
let g:vimtex_quickfix_mode=0
let g:tex_conceal='abdmg'
let g:vimtex_view_general_viewer = 'SumatraPDF'
let g:vimtex_view_general_options='-reuse-instance -forward-search @tex @line @pdf'
let g:vimtex_view_general_options_latexmk='-reuse-instance'

" --- For UtilSnips ---
" Trigger configuration
let g:UltiSnipsExpandTrigger=",,"
let g:UltiSnipsJumpForwardTrigger=""
let g:UltiSnipsJumpBackwardTrigger=""

" --- For lightline ---
let g:lightline = {
\ 'colorscheme': 'onedark',
\ }

" ---------------------------------------------------------------------"
" ---------------- SOME SETTINGS --------------------------------------"
" ---------------------------------------------------------------------"
" --- Set GUI Font ---
if has("gui_running")
if has("gui_gtk2")
set guifont=Inconsolata\ 12
elseif has("gui_macvim")
set guifont=Menlo\ Regular:h14
elseif has("gui_win32")
set guifont=JetBrainsMonoMedium_NF:h10
endif
endif

" --- Set colorscheme ---
" For 256 color support
if exists('+termguicolors')
let &t_8f = "<Esc>[38;2;%lu;%lu;%lum"
let &t_8b = "<Esc>[48;2;%lu;%lu;%lum"
set termguicolors
endif
" Colorscheme
" colorscheme onedark
colorscheme gruvbox
set background=dark
let g:gruvbox_contrast_dark='hard'
let g:gruvbox_italic=0

" --- Global settings ---
syntax on
set nocompatible
set nowrap
set clipboard=unnamed
set encoding=utf-8
set noerrorbells
set tabstop=4 softtabstop=4
set shiftwidth=4
set expandtab
set smartindent
set nu
set ignorecase
set smartcase
set noswapfile
set nobackup
set undodir=~/vimfiles/undodir
set undofile
set termwinsize=10x0
set incsearch
set textwidth=80
set colorcolumn=+1
" See 'Restore Screen Size And Pos' section
" let g:screen_size_restore_pos = 1

" --- Python3 ---
set pythonthreehome=\AppData\Local\Programs\Python\Python38
set pythonthreedll=\AppData\Local\Programs\Python\Python38\python38.dll

" --- Highlights ---
" highlight NonText ctermfg=lightgrey guifg=#555555
" highlight VertSplit ctermfg=grey ctermbg=grey guibg=bg
" highlight lCursor ctermfg=black ctermbg=white

" --- Set OmniCompletion on ---
filetype plugin on
set omnifunc=syntaxcomplete#Complete
" Spell check
set complete+=kspell
set completeopt=menuone,longest

" --- Removing menubar/toolbar/scrollbar from gvim ---
set guioptions-=m
set guioptions-=T
set guioptions-=r

" --- Change guicursor ---
set guicursor=i:hor20-Cursor
set guicursor+=r:hor25-Cursor
set guicursor+=c-ci-cr:block-Cursor

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[バクダンくん]

Seems that background cannot be transparent when termguicolors is on.

How to reproduce

1. vim --clean in Windows Terminal // bg is transparent as expected
2. :set termguicolors // bg become opaque even though :hi Normal still returns cleared

[Chaoticsys101]

Then is there another way to achieve true colors and transparent background in Windows Terminal?

[バクダンくん]

I think no. This should be a bug of Vim.
I believe this bug did not exist before, because my vimrc have settings to make background transparent when launched in WT.

[Chaoticsys101]

Closed #7147.

[Chaoticsys101]

Reopened #7147.

[Chaoticsys101]

Thanks. Should I submit a new issue regarding termguicolors bug?

[Chaoticsys101]

Closed #7147.

[Chaoticsys101]

I am closing this issue and opening a new, more specific one.
#7162

[dapovich]

Try the command autocmd vimenter * ++nested highlight normal ctermbg=none guibg=none and move it after your colorscheme declaration

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