How to custom your vim editor

.vimrc

" edit file:~ vi ~/.vimrc
" base
set nocompatible                      " vim, not vi
syntax on                             " syntax highlighting
filetype plugin indent on             " try to recognise filetype and load plugins and indent files

" interface
set background=dark                   " tell vim what the background color looks like
set colorcolumn=120                   " show a column at 100 chars
set cursorline                        " highlight current line
"set laststatus=2                     " enable airline on open
set noshowmode                        " don't show mode as airline already does
set number                            " show line numbers
set relativenumber                    " show relative line numbers
set ruler                             " show current position at bottom
set scrolloff=5                       " keep at least 5 lines above/below
set shortmess+=I                      " disable welcome screen
set showcmd                           " show any commands
set sidescroll=1                      " smoother horizontal scrolling
set sidescrolloff=5                   " keep at least 5 lines left/right
set splitbelow                        " create new splits below
set splitright                        " create new splits to the right
set termguicolors                     " enable true colors
set wildmenu                          " enable wildmenu
set wildmode=longest:full,full        " configure wildmenu

" whitespace
set expandtab                         " use tabs instead of spaces
set nojoinspaces                      " use one space, not two, after punctuation
set shiftround                        " shift to next tabstop
set shiftwidth=4                      " amount of space used for indentation
set softtabstop=4                     " appearance of tabs
set tabstop=4                         " use two spaces for tabs

" folding
set foldmethod=indent                 " fold based on markers
set nofoldenable                      " disable folds until `zc` or `zM` etc is used
set foldcolumn=3
hi FoldColumn ctermfg=216
hi FoldColumn ctermbg=black
hi Folded ctermfg=216
hi Folded ctermbg=black
au FileType ruby setlocal foldmethod=indent foldnestmax=4 foldlevelstart=1

" text appearance
set list                              " show invisible characters
" set listchars=tab:>·,trail:·,nbsp:¬   " but only show useful chaaracters
set listchars=tab:>·,trail:·,nbsp:¬   " but only show useful chaaracters
set nowrap                            " disable line wrapping

" interaction
set backspace=2                       " make backspace work like most other apps
set mouse=a                           " enable mouse support
set mousehide                         " hide the mouse cursor while typing
set whichwrap=b,s,h,l,<,>,[,]         " backspace and cursor keys wrap too

" searching
set hlsearch                          " highlight search matches
hi Search guibg=LightBlue
set ignorecase                        " set case insensitive searching
set incsearch                         " find as you type search
set smartcase                         " case sensitive searching when not all lowercase

" background processes
set autoread                          " update file when changed outside of vim
set autoindent                        " copy indentation from the previous line for new line
set clipboard=unnamed                 " use native clipboard
"set clipboard+=unnamedplus
set history=200                       " store last 200 commands as history
set lazyredraw                        " no unneeded redraws
set nobackup                          " don't save backups
set noerrorbells                      " no error bells please
set noswapfile                        " no swapfiles
set nowritebackup                     " don't save a backup while editing
set ttyfast                           " indicates a fast terminal connection
set undodir=~/.config/nvim/undodir    " set undofile location
set undofile                          " maintain undo history between sessions
set undolevels=1000                   " store 1000 undos

" autocmd Filetype html setlocal ts=4 sts=4 sw=4
" autocmd Filetype ruby setlocal ts=2 sts=2 sw=2
" autocmd Filetype javascript setlocal ts=4 sts=4 sw=4

" character encoding
if !&readonly
  set fileencoding=utf-8
endif

" Plugins
call plug#begin()
source ~/.vimrc.bundles

" add plugins to &runtimepath
call plug#end()
filetype on