Node Server .env file undefined in server.js

Question

The below screenshot shows my file structure in VS code. I have used npm concurrent to run both backend and frontend simultaneously. My problem is env file is not recognized in the server file. Please tell me what is wrong here.

Second screenshot for illustration:

Can you show what's within the env file, and your package.json? — Youssouf Oumar
– Youssouf Oumar, Commented Jul 24, 2022 at 15:36

Hoon · Accepted Answer · 2022-07-24 16:08:32Z

4

You can specify the path where the .env file is to dotenv package.

Please modify the following line of code to

require("dotenv").config();

like this:

require("dotenv").config({path: "./back-end/.env"});

edited Jul 24, 2022 at 16:08

answered Jul 24, 2022 at 15:38

Hoon

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5 Comments

Nuwan Chamikara Over a year ago

Still have the same error.

Hoon Over a year ago

Did you install the dotenv package? Can I see the package.json file?

Nuwan Chamikara Over a year ago

{   "name": "back-end",   "version": "1.0.0",   "description": "",   "main": "index.js",   "scripts": {     "test": "echo \"Error: no test specified\" && exit 1"   },   "keywords": [],   "author": "",   "license": "ISC",   "dependencies": {     "body-parser": "^1.20.0",     "cors": "^2.8.5",     "dotenv": "^16.0.1",     "express": "^4.18.1",     "mongoose": "^6.4.6",     "nodemon": "^2.0.19"   } }

Nuwan Chamikara Over a year ago

If I replaced the env file with a new place according to the second picture It worked. But I want to move that file to the back-end folder. Then how should change my path?

Hoon Over a year ago

Oh I misunderstood the .env file's path.. I thought it was in the main folder. In that case, you can change the path to "./back-end/.env"

Sahil Thummar · Accepted Answer · 2022-07-24 16:18:24Z

2

write PORT in .env file in backend folder

PORT = <PORT_NUMBER>

For Ex.

PORT = 3000

Install dotenv in backend folder

npm i dotenv

Import dotenv in server.js file

require('dotenv').config()

or set .env path in

require("dotenv").config({path: "./back-end/.env"});

Then Check by:

console.log(process.env);

Run in backend folder

node server.js

edited Jul 24, 2022 at 16:18

answered Jul 24, 2022 at 15:40

Sahil Thummar

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3 Comments

Nuwan Chamikara Over a year ago

Thank you I have followed these steps. But didn't work

Sahil Thummar Over a year ago

Go into back-end folder and then run node server.js instead of node back-end/server.js

Sahil Thummar Over a year ago

Or if you wants to run node back-end/server.js then you have to specify .env path

user14758149 · Accepted Answer · 2022-07-24 15:40:39Z

1

To use DotEnv, first install it using the command: npm i dotenv . Then in your app, require and configure the package like this: require('dotenv'). config()

    require('dotenv').config();

console.log(process.env.MY_ENV_VAR);

answered Jul 24, 2022 at 15:40

user14758149

2 Comments

Nuwan Chamikara Over a year ago

I have installed dotenv

Nuwan Chamikara Over a year ago

If I replaced the env file with a new place according to the second picture It worked. But I want to move that file to the back-end folder. Then how should change my path?

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