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();

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

Afs

Bexpress

Chttp

Ddotenv

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'express' instead of 'dotenv'.

Trying to read .env file manually without a package.

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

2fill in blank

medium

Complete the code to access the PORT environment variable with a default fallback.

Node.js

const port = process.env.[1] || 3000;

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

APATH

BHOST

CPORT

DNODE_ENV

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'HOST' instead of 'PORT'.

Forgetting to provide a default value.

process.env.PORT accesses the port number set in environment variables. If not set, it falls back to 3000.

3fill in blank

hard

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

Node.js

import dotenv from '[1]';

await dotenv.config();

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

Afs

Bdotenv

Chttp

Dpath

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'fs' or 'path' instead of 'dotenv'.

Trying to use 'await' with a synchronous method.

The dotenv package is imported to use its config() method for loading environment variables.

4fill in blank

hard

Fill both blanks to set a custom path for the .env file and load it.

Node.js

dotenv.config({ path: [1] + '[2]' });

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

A__dirname + '/configs/'

B'.env'

C'.env.local'

D'/env/'

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect folder or filename strings.

Not concatenating strings properly.

Combining __dirname + '/configs/' with '.env' sets a custom path to the .env file.

5fill in blank

hard

Fill all three blanks to create a config object that reads NODE_ENV, sets a default, and exports it.

Node.js

const config = {
  env: process.env.[1] || '[2]',
  port: process.env.PORT || [3]
};

export default config;

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

ANODE_ENV

Bdevelopment

C3000

DHOST

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong environment variable names.

Not providing default values.

This config object reads NODE_ENV with a default of 'development' and sets port with a default of 3000.