Route parameters in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a route that captures a user ID parameter.

Express

app.get('/user/[1]', (req, res) => {
  res.send(`User ID is ${req.params.id}`);
});

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

A:id

B?id

C*id

D#id

Attempts:

3 left

💡 Hint

Common Mistakes

Using *id or ?id instead of :id

Forgetting the colon before the parameter name

The colon : before id defines a route parameter in Express.

2fill in blank

medium

Complete the code to access the route parameter named 'postId'.

Express

app.get('/post/:postId', (req, res) => {
  const postId = req.params.[1];
  res.send(`Post ID: ${postId}`);
});

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

Aid

Bparam

CpostId

Dpost

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than defined in the route

Trying to access req.params.id when the parameter is named postId

You access the route parameter by its exact name, here postId.

3fill in blank

hard

Fix the error in the route to correctly capture the 'category' parameter.

Express

app.get('/items/[1]', (req, res) => {
  res.send(`Category: ${req.params.category}`);
});

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

Acategory

B:category

C*category

D?category

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the colon before the parameter name

Using wildcard or optional parameter syntax incorrectly

The route parameter must start with a colon (:), so use ':category'.

4fill in blank

hard

Fill both blanks to define a route with two parameters and access them.

Express

app.get('/[1]/:[2]', (req, res) => {
  res.send(`Category: ${req.params.category}, ID: ${req.params.id}`);
});

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

Acategory

Bid

Cuser

Dpost

Attempts:

3 left

💡 Hint

Common Mistakes

Using parameter syntax for the first segment

Mixing up parameter names

The route path should be '/category/:id' to capture both parameters correctly.

5fill in blank

hard

Fill all three blanks to create a route with nested parameters and access them.

Express

app.get('/[1]/:[2]/[3]/:commentId', (req, res) => {
  res.send(`Post: ${req.params.postId}, Comment: ${req.params.commentId}`);
});

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

Aposts

BpostId

Ccomments

Dcomment

Attempts:

3 left

💡 Hint

Common Mistakes

Using singular instead of plural fixed segments

Forgetting the colon before parameter names

The route path should be '/posts/:postId/comments/:commentId' to capture both post and comment IDs.