dotenv for environment configuration in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load environment variables from a .env file.

Node.js

require('[1]').config();
console.log(process.env.MY_VAR);

Drag options to blanks, or click blank then click option'

Adotenv

Bexpress

Chttp

Dfs

Attempts:

3 left

💡 Hint

Common Mistakes

Using other packages like express or fs instead of dotenv.

The dotenv package loads environment variables from a .env file into process.env.

2fill in blank

medium

Complete the code to access the environment variable named PORT.

Node.js

const port = process.env.[1] || 3000;
console.log(`Server runs on port ${port}`);

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APORT

Bport

CPath

DHOST

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'port' instead of uppercase 'PORT'.

Environment variables are case-sensitive. The variable is named PORT in uppercase.

3fill in blank

hard

Fix the error in the code to correctly load environment variables.

Node.js

import dotenv from '[1]';
dotenv.[2]();
console.log(process.env.SECRET_KEY);

Drag options to blanks, or click blank then click option'

Aconfig

Bdotenv

Cexpress

Dload

Attempts:

3 left

💡 Hint

Common Mistakes

Importing from wrong package names like 'express' or 'load'.

The package name to import is dotenv. The method to load variables is config().

4fill in blank

hard

Fill both blanks to create a .env file and load a variable named API_KEY.

Node.js

API_KEY=[1]

require('dotenv').[2]();
console.log(process.env.API_KEY);

Drag options to blanks, or click blank then click option'

A"12345abcde"

Bconfig

Cload

D"apikey"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the value or using wrong method name to load variables.

The .env file stores variables as key=value pairs. The value should be quoted if it contains letters and numbers. The method to load is config().

5fill in blank

hard

Fill all three blanks to create a Node.js script that loads dotenv, reads PORT, and starts a server.

Node.js

import dotenv from '[1]';
dotenv.[2]();
const port = process.env.[3] || 8080;

Drag options to blanks, or click blank then click option'

Adotenv

Bconfig

CPORT

Dexpress

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong package names or method names, or wrong variable case.

Import dotenv, call config() to load variables, then read PORT from process.env.