Third-party middleware usage in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Express middleware package.

Node.js

const express = require('[1]');

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

Ahttp

Bpath

Cfs

Dexpress

Attempts:

3 left

💡 Hint

Common Mistakes

Using core Node.js modules like 'http' instead of 'express'.

Misspelling the package name.

The Express middleware package is imported using require('express').

2fill in blank

medium

Complete the code to use the middleware function in the Express app.

Node.js

app.[1](middlewareFunction);

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

Aget

Blisten

Cuse

Dpost

Attempts:

3 left

💡 Hint

Common Mistakes

Using route methods like 'get' or 'post' instead of 'use'.

Trying to call 'listen' to add middleware.

Use app.use() to apply middleware functions in Express.

3fill in blank

hard

Fix the error in the middleware function signature.

Node.js

function middleware(req, [1], next) {
  console.log('Middleware running');
  next();
}

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

Aresponse

Bres

Cnext

Drequest

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'next' as the second parameter instead of the third.

Using incorrect parameter names.

The middleware function parameters are req, res, and next.

4fill in blank

hard

Fill both blanks to import and use the 'cors' middleware in Express.

Node.js

const [1] = require('cors');
app.[2]([1]());

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

Acors

Blisten

Cuse

Dexpress

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'listen' instead of 'use' to apply middleware.

Importing the wrong package.

Import 'cors' with require('cors') and use it with app.use(cors()).

5fill in blank

hard

Fill all three blanks to import, configure, and use the 'helmet' middleware with options.

Node.js

const [1] = require('helmet');
const helmetOptions = { contentSecurityPolicy: false };
app.[2]([1]([3]));

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

Ahelmet

Buse

ChelmetOptions

Dcors

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'cors' with 'helmet'.

Not passing options to the middleware function.

Import 'helmet', then use app.use(helmet(helmetOptions)) to apply it with options.