React.js tips.

React can either render HTML tags (strings) or React components (classes).

To render an HTML tag, just use lower-case tag names in JSX:

var myDivElement = <div className="foo" />;
ReactDOM.render(myDivElement, document.getElementById('example'));

To render a React Component, just create a local variable that starts with an upper-case letter:

var MyComponent = React.createClass({/*...*/});
var myElement = <MyComponent someProperty={true} />;
ReactDOM.render(myElement, document.getElementById('example'));

React's JSX uses the upper vs. lower case convention to distinguish between local component classes and HTML tags.

MongoDB Default Admin Password

По умолчанию в MongoDB аутентификация отключена.

Для mongo-express используйте user:admin password:pass.
For mongo-express you should use the default account “user:admin”, “password:pass”

Чтобы включить аутентификацию , добавьте "security: authorization: enabled"  в mongo.cfg.
Добавляем администратора:

use admin
db.createUser(
  {
    user: "myUserAdmin",
    pwd: "abc123",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)

Arrow keys not working on Windows 10 using slc loopback

Quick resolve. Choose "Use legacy console (requires relaunch)" and compability "Windows 95" far.exe (Far Manager) shortcut properties.

GIT error: LF would be replaced by CRLF

Проект loopback.js развернут на Windows.

Конец строки (EOL) во всех файлах Unix-style.
Как вариант исправления ошибки GIT:

$ git config --global core.autocrlf input
Подробнее 

                 | Resulting conversion when       | Resulting conversion when 
                 | committing files with various   | checking out FROM repo - 
                 | EOLs INTO repo and              | with mixed files in it and
                 |  core.autocrlf value:           | core.autocrlf value:           
--------------------------------------------------------------------------------
File             | true       | input      | false | true       | input | false
--------------------------------------------------------------------------------
Windows-CRLF     | CRLF -> LF | CRLF -> LF | as-is | as-is      | as-is | as-is
Unix -LF         | as-is      | as-is      | as-is | LF -> CRLF | as-is | as-is
Mac  -CR         | as-is      | as-is      | as-is | as-is      | as-is | as-is
Mixed-CRLF+LF    | as-is      | as-is      | as-is | as-is      | as-is | as-is
Mixed-CRLF+LF+CR | as-is      | as-is      | as-is | as-is      | as-is | as-is

http://stackoverflow.com/questions/1249932/git-1-6-4-beta-on-windows-msysgit-unix-or-dos-line-termination/1250133#1250133

Visual Studio Code cannot detect installed git

The user settings file is located here:

Windows %APPDATA%\Code\User\settings.json
Mac $HOME/Library/Application Support/Code/User/settings.json
Linux $HOME/.config/Code/User/settings.json

Just add the path to the git executable in your Visual Studio Code settings like this:

{

    "git.enabled": true,

    // Path to the git executable

    "git.path": "C:\path\to\git.exe"

}

https://code.visualstudio.com/Docs/customization/userandworkspace
http://stackoverflow.com/questions/29971624/visual-studio-code-cannot-detect-installed-git

Установка MongoDB на Windows (Installing MongoDB on Windows)

После установки. (After install)
1. Создать файл mongodb.cfg (Create file)

systemLog:
    destination: file
    path: c:\data\log\mongod.log
storage:
    dbPath: c:\data\db

2. Создать каталоги (Create directories):

mkdir c:\data\db
mkdir c:\data\log

3. Установить службу(Install service): 

"C:\mongodb\bin\mongod.exe" --config "C:\mongodb\mongod.cfg" --install

https://docs.mongodb.org/manual/tutorial/install-mongodb-on-windows/