Intro and Basics

Introduction

Differences between to the browser and NodeJS

| Browser | NodeJS | | DOM | No Dom | | Window | No Window | | Interactive Apps | Server Side Apps | | No Filesystem | Filesystem | | Fragmentation | Versions | | ES6 Modules | CommonJS |

How to get Node to evaluate our code

REPL (Read, Eval, Print Loop)

$ node
Welcome to Node.js v16.9.1.
Type ".help" for more information.
>

CLI executable

$ node 00_app.js
large number
hey it is my first node app

Globals

Some global variables available

• __dirname: path of current directory
• __filename
• require: function to use modules
• module: info about current module
• process: info about the environment where the program is bein executed

Note that in Node there is no window object like in Javascript.