Table of Contents

• Update Node

• VS Code Editor Setup

• Linting Setup

• Global Object & Module System

• __dirname & __filename

• Module System

• Module Wrapper Function

• window vs global Object

• window vs global Object

• window vs global Object

• Contact

Update Node

Please follow the below instructions to update node in your machine:

Windows

1. Update npm

   npm install npm@latest -g

2. Clear npm cache

   npm cache clean -f

3. Install n

   npm install -g n

4. Update node to latest version

   n latest

Install and Update yarn

Please follow the below instructions to install or update yarn in your machine.

On Windows

1. Install yarn

   npm install -g yarn

2. Update yarn

   yarn set version latest

On Mac

1. Install yarn

   brew install yarn

2. Update yarn

   brew update
   brew upgrade yarn

VS Code Editor Setup

In order to follow along the tutorial series, I recommend you to use Visual Studio Code Editor and install & apply the below extensions and settings.

Extensions

Install the below extensions:

• ESLint
• Prettier
• Path Autocomplete

Settings

Go to your Visual Stuido Code settings.json file and add the below settings there:

// config related to code formatting
"editor.defaultFormatter": "esbenp.prettier-vscode",
"editor.formatOnSave": true,
"[javascript]": {
  "editor.formatOnSave": false,
  "editor.defaultFormatter": null
},
"editor.codeActionsOnSave": {
  "source.fixAll.eslint": true,
  "source.organizeImports": true
},
"eslint.alwaysShowStatus": true

Set Line Breaks

Make sure in your VS Code Editor, "LF" is selected as line feed instead of CRLF (Carriage return and line feed). To do that, just click LF/CRLF in bottom right corner of editor, click it and change it to "LF". If you dont do that, you will get errors in my setup.

Linting Setup

In order to lint and format your code automatically according to popular airbnb style guide, I recommend you to follow the instructions as described in video. References are as below.

Install Dev Dependencies

yarn add -D eslint prettier
npx install-peerdeps --dev eslint-config-airbnb-base
yarn add -D eslint-config-prettier eslint-plugin-prettier

Setup Linting Configuration file

Create a .eslintrc.json file in the project root and enter the below contents:

{
  "extends": ["prettier", "airbnb-base"],
  "parserOptions": {
    "ecmaVersion": 12
  },
  "env": {
    "commonjs": true,
    "node": true
  },
  "rules": {
    "no-console": 0,
    "indent": 0,
    "linebreak-style": 0,
    "prettier/prettier": [
      "error",
      {
        "trailingComma": "es5",
        "singleQuote": true,
        "printWidth": 100,
        "tabWidth": 4,
        "semi": true
      }
    ]
  },
  "plugins": ["prettier"]
}

Global Object and Module System

As we know that in vanilla javascript we can find window objects in the browser. Inside the window object, we can find lots of built-in functions such as SetTimeout, SetInterval, alert, onClick, and so on. But in node.js we don't have a window object. But still, SetTimeout or SetInterval function works on node.js then questions rising how it works actually.

Well, in node.js we don't have any windows object instead we have a Global object. To see it write console.log(global) we will find some built-in functions inside the global object.

Contact

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