My own (Neo)Vim configuration which focuses on JS(React, Vue, stage-0, TS, Flow), CSS(and styled-components), GraphQL and GO, however also works with C# and Python. Configuration is based on Tmux, iTerm2, OSX but I also use it on Ubuntu. I use Alt and CMD for some key mappings, so it's more suitable for Mac+iTerm.

Installation

1. Install required binaries

1. Have (Neo)Vim and Git installed ofcourse
2. Tmux (plugins: https://github.com/sourcesoft/my-long-list/blob/master/.tmux.conf)
3. If using OSX: brew install reattach-to-user-namespace
4. Rainbarf (https://github.com/creaktive/rainbarf)
5. Oh My ZSH (https://github.com/robbyrussell/oh-my-zsh)
6. If you're running OSX install iTerm and Dash.app (https://kapeli.com/dash)
7. GO (https://golang.org/doc/install)
8. The Silver Searcher (https://github.com/ggreer/the_silver_searcher)
9. Free Inconsolata font

2. Backup your old configuration and get new ones

1. Backup the old one first: mv ~/.vimrc ~/.vimrc.bak
2. Replace it: wget -O ~/.vimrc https://raw.githubusercontent.com/sourcesoft/my-long-list/master/.vimrc
3. NeoVim uses XDG configuration: ln -s ~/.vimrc ~/.config/nvim/init.vim
4. Vim uses old .vimrc location so there's no need to create symlink.
5. Copy other config files in the repository like .bash_profile, .gitconfig, .tern-config, .tmux.conf, .zshrc, .eslintrc.js, prettierrc, .gitignore, .prettierignore and configure more if feel comfortable.

3. Download and install more

1. Before opening (Neo)Vim:

• Install necessary global node packages by running npm install -g typescript neovim
• Install global node packages for eslint npm i -g eslint eslint-config-airbnb eslint-config-airbnb-base eslint-config-prettier eslint-plugin-import eslint-plugin-prettier prettier eslint-import-resolver-webpack eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react eslint-plugin-redux-saga redux-saga webpack babel-eslint or install them in the project directory as a dev dependency.
• Open tmux running tmux and install tmux plugins with Prefix + I
• Install vim-plug: https://github.com/junegunn/vim-plug
• Download and install Knack Nerd Font from here and configure iTerm2 to use it.
• Install plugins by running vim +PlugInstall +qall or nvim +PlugInstall +qall in terminal

2. Open (Neo)Vim and:

• Run :UpdateRemotePlugins in vim at the end.
• Open NeoVim(Vim) and run :GoInstallBinaries and then :TmuxLine
• Learn key bindings by reading this file

Mappings and Environment

It's much easier to use right CMD or Alt instead of reaching out escape. I also use Caps Lock for Control, since it's closer and easier to hit.

• Escape -> Right CMD or Right Alt
• Control -> Caps Lock

Tools to setup the key bindings:

• OSX: Use Karabiner to map
  • Visit: https://github.com/tekezo/Karabiner-Elements
• Ubuntu: Install xcape (https://github.com/alols/xcape)
  • Use the following command: xcape -e 'Alt_R=Escape;ISO_Level3_Shift=Escape'

Hex code mappings for iTerm:

• cmd-o: 0x01 0x29 --- tmux next session
• cmd-i: 0x01 0x28 --- tmux previous session
• cmd-j: 0x2C 0x73 0x6A --- vim jump page down
• cmd-k: 0x2C 0x73 0x6B --- vim jump page up
• cmd-m: 0x2C 0x6D --- vim quickfix previous
• cmd-n: 0x2C 0x6E --- vim quickfix next
• cmd-n: 0x2C 0x71 --- vim quickfix toggle
• cmd-p: 0x2C 0x70 --- vim run tmux command
• cmd-r: 0x2C 0x72 --- vim run last tmux command
• cmd-f: 0x2C 0x66 --- vim toggle fullscreen
• cmd-;: 0x2C 0x3B --- list buffers
• cmd-a: 0x2C 0x61 --- search current buffer subdirectory
• cmd-s: 0x2C 0x73 0x73 --- run ALEFix
• ctrl-space: 0x2C 0x76 --- lookup Dash.app docs

Troubleshooting to get NeoVim, iTerm and Tmux all work together smoothly:

• https://github.com/neovim/neovim/wiki/FAQ#how-can-i-change-the-cursor-shape-in-the-terminal
• https://github.com/neovim/neovim/wiki/FAQ#my-ctrl-h-mapping-doesnt-work
• neovim/neovim#2048
• http://stackoverflow.com/questions/6778961
• http://stackoverflow.com/questions/39645253
• http://www.nthelp.com/ascii.htm
• http://superuser.com/questions/259614

Tools as a developer

• NeoVim / vimrc / ag - Can't live without ya'll, not even a day.
• iTerm2 / zsh / tmux - Performant terminal and shell everywhere.
• SourceTree - I can't remember all those weird hard to memorize git commands, so this is my GUI.
• Transmit - I'm using it for what it is and It's got everything I want.
• Paw - Advanced REST client for testing my backend
• Little Snitch - Sometimes I need to monitor I/O of an application I'm developing.
• Charles - Monitoring using all the tools even the ones I have no idea what they are.
• Fritzing - Easily design electronic circuits for Arduino in no time.
• OsmondCocoa - Sometimes I need to build a ready to print for some home-made circuits.