1require('dotenv').config();
2
3console.log(process.env.MY_ENV_VAR);

1
2$ npm install dotenv
3
4//--------------------
5
6on file .env 
7//--------------------
8DB_HOST=localhost
9DB_USER=root
10DB_PASS=s1mpl3
11DB_NAME=banco_de_dados
12DB_PORT=3306
13//--------------------
14
15import the config from .env file 
16//--------------------
17
18require('dotenv').config()
19module.exports = {
20    username:process.env.DB_USER,
21    password:process.env.DB_PASS,
22    database:process.env.DB_NAME,
23    host:process.env.DB_HOST,
24    dialect:"mysql"
25}
26

1npm install dotenv --save

1// Terminal/CMD
2npm i dotenv
3
4//In .env file
5special_key = 0000000 //whatever the key
6
7//In JS file - 2 point usage
8//1 - initialisation
9require('dotenv').config();
10//2 - using the special key
11const specialKey = process.env.special_key
12console.log(specialKey);

1npm install dotenv

1Rename your file to just .env, removing any prefix
2require it as early as possible in your application with the code snippet below
3require('dotenv').config();