How to set Environment variables and avoid undefined errors

Writing Environment Variables can be tricky sometimes. If you face problems in setting and accessing environment variables, this video is for you.

Quick tips:
1) If you are setting your .env file in the root of your project, you can access env variables with....
require('dotenv').config()

2)if you are setting your .env file anywhere else (other than root of the project). you can access env variables with.....
require('dotenv').config({ path: '/custom/path/to/.env' })

[pYthonroasT]

if it's still not working just mention the file path in the require("dotenv").config( { path : "env file location"} );

[mdmuktadirmazumder]

thnx senpai, 2nd option worked for me

[JoaoVitor-pcps]

in my case, i have a folder (models) in my project, that theris a database configuration archive. how can i do this? the result is being "undefined", but at the "index.js" main archive it works properly.

[o.jc.o]

If somebody is dummy just like me and gets the "port undefined" problem... start the server while you are placed in the root folder of the project, and not from inside /root_folder/src , oh my god -.-"