npm initialization and package.json in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize a new npm project with default settings.

Node.js

npm [1] -y

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

Ainit

Binstall

Cstart

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'npm install' instead of 'npm init' to create package.json

Forgetting the '-y' flag to accept defaults

The npm init -y command quickly creates a package.json file with default values.

2fill in blank

medium

Complete the JSON snippet to specify the main entry file in package.json.

Node.js

"main": "[1]"

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

Aindex.js

Bapp.json

CREADME.md

Dpackage.json

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'package.json' as main file

Using a non-JavaScript file like README.md

The main field tells Node.js which file to load first, usually index.js.

3fill in blank

hard

Fix the error in the package.json script to start the app with node.

Node.js

"scripts": { "start": "node [1]" }

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

Apackage.json

Bindex.js

Cnpm

Dstart.js

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to run 'package.json' as a script

Using a file name that does not exist

The start script should run the main JavaScript file, usually index.js.

4fill in blank

hard

Fill both blanks to add a dependency and save it to package.json.

Node.js

npm [1] express [2]

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

Ainstall

B--save-dev

C--save

Dupdate

Attempts:

3 left

💡 Hint

Common Mistakes

Using '--save-dev' instead of '--save' for regular dependencies

Using 'update' instead of 'install'

Use npm install express --save to add express as a dependency in package.json.

5fill in blank

hard

Fill all three blanks to create a script that runs tests with jest.

Node.js

"scripts": { "test": "[1] [2]" }, "devDependencies": { "[3]": "^29.0.0" }

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

Ajest

B--coverage

Dmocha

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mocha' instead of 'jest' when jest is the intended test runner

Forgetting to add jest as a devDependency

The test script runs jest --coverage and jest is added as a devDependency.