Open file with new tab but [no name] is always there in vim - nerdtree

Question

Hello I open file in NERDTree using t but new files is always there. Before I use vim in folder. that mean when I located in ex: app folder, I run vim without type specific files to edit. when I open files in nerd tree, new file [No Name] is always there. is anyone know how to fix it?
this is my init.vim
" Specify a directory for plugins
call plug#begin('~/.vim/plugged')
Plug 'dense-analysis/ale'
Plug 'mattn/emmet-vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'scrooloose/nerdtree'
"Plug 'tsony-tsonev/nerdtree-git-plugin'
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
Plug 'ryanoasis/vim-devicons'
Plug 'airblade/vim-gitgutter'
Plug 'ctrlpvim/ctrlp.vim' " fuzzy find files
Plug 'scrooloose/nerdcommenter'
"Plug 'prettier/vim-prettier', { 'do': 'yarn install' }"
Plug 'christoomey/vim-tmux-navigator'
Plug 'sheerun/vim-polyglot'
Plug 'morhetz/gruvbox'
Plug 'rafi/awesome-vim-colorschemes'
Plug 'vim-airline/vim-airline'
Plug 'Yggdroot/indentLine'
Plug 'HerringtonDarkholme/yats.vim' " TS Syntax
Plug 'tomasiser/vim-code-dark'
" Initialize plugin system
call plug#end()
inoremap jk <ESC>
nmap <C-n> :NERDTreeToggle<CR>
vmap ++ <plug>NERDCommenterToggle
nmap ++ <plug>NERDCommenterToggle
set mouse=a
set number
set hidden
set cursorline
set expandtab
set autoindent
set smartindent
set shiftwidth=4
set tabstop=4
set encoding=utf8
set history=5000
set clipboard=unnamedplus
" open NERDTree automatically
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * NERDTree
" Open the existing NERDTree on each new tab.
autocmd BufWinEnter * silent NERDTreeMirror
" Exit Vim if NERDTree is the only window left.
autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
\ quit | endif
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree")
\ && b:NERDTree.isTabTree()) | q | endif
let g:NERDTreeGitStatusWithFlags = 1
"let g:WebDevIconsUnicodeDecorateFolderNodes = 1
"let g:NERDTreeGitStatusNodeColorization = 1
"let g:NERDTreeColorMapCustom = {
"\ "Staged" : "#0ee375",
"\ "Modified" : "#d9bf91",
"\ "Renamed" : "#51C9FC",
"\ "Untracked" : "#FCE77C",
"\ "Unmerged" : "#FC51E6",
"\ "Dirty" : "#FFBD61",
"\ "Clean" : "#87939A",
"\ "Ignored" : "#808080"
"\ }
let g:NERDTreeIgnore = ['^node_modules$']
" vim-prettier
"let g:prettier#quickfix_enabled = 0
"let g:prettier#quickfix_auto_focus = 0
" prettier command for coc
command! -nargs=0 Prettier :CocCommand prettier.formatFile
" run prettier on save
"let g:prettier#autoformat = 0
"autocmd BufWritePre *.js,*.jsx,*.mjs,*.ts,*.tsx,*.css,*.less,*.scss,*.json,*.graphql,*.md,*.vue,*.yaml,*.html PrettierAsync
" ctrlp
let g:ctrlp_user_command = ['.git/', 'git --git-dir=%s/.git ls-files -oc --exclude-standard']
" j/k will move virtual lines (lines that wrap)
noremap <silent> <expr> j (v:count == 0 ? 'gj' : 'j')
noremap <silent> <expr> k (v:count == 0 ? 'gk' : 'k')
nnoremap <C-s> :w<CR>
nnoremap <C-Q> :wq<CR>
" shift+arrow selection
nmap <S-Up> v<Up>
nmap <S-Down> v<Down>
nmap <S-Left> v<Left>
nmap <S-Right> v<Right>
vmap <S-Up> <Up>
vmap <S-Down> <Down>
vmap <S-Left> <Left>
vmap <S-Right> <Right>
imap <S-Up> <Esc>v<Up>
imap <S-Down> <Esc>v<Down>
imap <S-Left> <Esc>v<Left>
imap <S-Right> <Esc>v<Right>
vmap <C-c> y<Esc>i
vmap <C-x> d<Esc>i
map <C-v> pi
imap <C-v> <Esc>pi
set cindent
set t_Co=256
set t_ut=
colorscheme onedark
" sync open file with NERDTree
" " Check if NERDTree is open or active
function! IsNERDTreeOpen()
return exists("t:NERDTreeBufName") && (bufwinnr(t:NERDTreeBufName) != -1)
endfunction
" Call NERDTreeFind iff NERDTree is active, current window contains a modifiable
" file, and we're not in vimdiff
function! SyncTree()
if &modifiable && IsNERDTreeOpen() && strlen(expand('%')) > 0 && !&diff
NERDTreeFind
wincmd p
endif
endfunction
" Highlight currently open buffer in NERDTree
autocmd BufEnter * call SyncTree()
" coc config
let g:coc_global_extensions = [
\ 'coc-snippets',
\ 'coc-pairs',
\ 'coc-tsserver',
\ 'coc-eslint',
\ 'coc-prettier',
\ 'coc-json',
\ 'coc-python',
\ ]
" from readme
" if hidden is not set, TextEdit might fail.
set hidden " Some servers have issues with backup files, see #649 set nobackup set nowritebackup " Better display for messages set cmdheight=2 " You will have bad experience for diagnostic messages when it's default 4000.
set updatetime=300
" don't give |ins-completion-menu| messages.
set shortmess+=c
" always show signcolumns
set signcolumn=yes
" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
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
" Use <c-space> to trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()
" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
" Coc only does snippet and additional edit on confirm.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
" Or use `complete_info` if your vim support it, like:
" inoremap <expr> <cr> complete_nfo()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
" Use `[g` and `]g` to navigate diagnostics
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)
" Remap keys for gotos
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gr <Plug>(coc-references)
" Use K to show documentation in preview window
nnoremap <silent> K :call <SID>show_documentation()<CR>
function! s:show_documentation()
if (index(['vim','help'], &filetype) >= 0)
execute 'h '.expand('<cword>')
else
call CocAction('doHover')
endif
endfunction
" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')
" Remap for rename current word
nmap <F2> <Plug>(coc-rename)
" Remap for format selected region
xmap <leader>f <Plug>(coc-format-selected)
nmap <leader>f <Plug>(coc-format-selected)
augroup mygroup
autocmd!
" Setup formatexpr specified filetype(s).
autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
" Update signature help on jump placeholder
autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end
" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
xmap <leader>a <Plug>(coc-codeaction-selected)
nmap <leader>a <Plug>(coc-codeaction-selected)
" Remap for do codeAction of current line
nmap <leader>ac <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf <Plug>(coc-fix-current)
" Create mappings for function text object, requires document symbols feature of languageserver.
xmap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap if <Plug>(coc-funcobj-i)
omap af <Plug>(coc-funcobj-a)
" Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
nmap <silent> <C-d> <Plug>(coc-range-select)
xmap <silent> <C-d> <Plug>(coc-range-select)
" Use `:Format` to format current buffer
command! -nargs=0 Format :call CocAction('format')
" Use `:Fold` to fold current buffer
command! -nargs=? Fold :call CocAction('fold', <f-args>)
" use `:OR` for organize import of current buffer
command! -nargs=0 OR :call CocAction('runCommand', 'editor.action.organizeImport')
" Add status line support, for integration with other plugin, checkout `:h coc-status`
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}
" Using CocList
" Show all diagnostics
nnoremap <silent> <space>a :<C-u>CocList diagnostics<cr>
" Manage extensions
nnoremap <silent> <space>e :<C-u>CocList extensions<cr>
" Show commands
nnoremap <silent> <space>c :<C-u>CocList commands<cr>
" Find symbol of current document
nnoremap <silent> <space>o :<C-u>CocList outline<cr>
" Search workspace symbols
nnoremap <silent> <space>s :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent> <space>j :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent> <space>k :<C-u>CocPrev<CR>
" Resume latest coc list
nnoremap <silent> <space>p :<C-u>CocListResume<CR>i
set laststatus=2
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1
let g:airline_statusline_ontop=0
let g:airline_theme='onedark'
let g:airline#extensions#tabline#formatter = 'default'
" navegação entre os buffers
nnoremap <M-Right> :bn<cr>
nnoremap <M-Left> :bp<cr>
nnoremap <c-x> :bp \|bd #<cr>
let g:ale_completion_enabled = 0
let g:ale_linters = {'python': ['flake8', 'pylint'], 'javascript': ['eslint']}

Answer 1

To fix it, navigate to the tab which has [No Name] open in it, and close that tab
ESC gt :tabclose
Why?
When you start Vim, Vim opens a buffer as a window in a tab. When you use NerdTree to open a new file — using t — in a new tab, …you're opening a new buffer as a new window in a new tab. The old one is still there. If you look at the top left of your Vim window 👇🏾 it shows two tabs open.
Now the confusing thing about Vim is that Vim Tabs don't work like IDE tabs. In Vim, tabs are more layouts. Using them as buffers is counterintuitive. I would suggest investing some time in understanding buffers.

Answer 2

This isn't ideal, but for the very first file, open it with "o" instead of "t" , this will replace the buffer instead