CODEWITHSUNDEEP
javascriptnode.js
Josue Developer
Josue Developer

Reputation: 23

How can I call environment variables?

in the .env file I set some variables //file .env

NAME="Darwin"

But when you call it in a js file, I get an undefined value //file index.js

console.log(process.env.NAME)

and when executing node index.js

undefined

Can you explain me why this happens, Thanks.

Upvotes: 2

Views: 2936

Answers (3)

Maheskumar
Maheskumar

Reputation: 171

Import dotenv npm module.

const dotenv = require('dotenv').config();
console.log(process.env.NAME)

Upvotes: 0

radhey shyam
radhey shyam

Reputation: 769

When you create .env file, for that time it is just a file like other js or text files, to use it we need to use dotenv npm package.

Ref: https://www.npmjs.com/package/dotenv

We need to use it on the top of our initial node project file.

i.e index.js

Syntax For ES6/Type Script (With babel transpilation)

import dotenv from 'dotenv';
dotenv.config();

or 

dotenv.config({path: `<path of .evn file>`});

Syntax for ES5 node js environment

require('dotenv').config();

or

require('dotenv').config({path: <path of .env file>});

By default it is taking .env from the project working directory, but if you have created the .env file with different name than you need to specify the path.

After that you can console your env variable inside the code anywhere.

Upvotes: 0

Happy Machine
Happy Machine

Reputation: 1163

If you include the dotenv dependancy you won't have this problem https://www.npmjs.com/package/dotenv

Then simply add at the top of your script

import dotenv from 'dotenv';
dotenv.config();

(if you have es6 via babel / createreactapp etc)

or

require('dotenv').config();

Upvotes: 3

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