req.params for route parameters in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access the route parameter 'id' using req.params.

Express

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

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

Aid

Bparams

Cquery

Dbody

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.query instead of req.params

Trying to access req.body for route parameters

The route parameter 'id' is accessed via req.params.id.

2fill in blank

medium

Complete the code to define a route that captures a 'postId' parameter.

Express

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

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

ApostId

Bid

Cpost

Dpid

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name in the route and in req.params

Omitting the ':' before the parameter name

The route parameter name must match the key used in req.params. Here, 'postId' is used.

3fill in blank

hard

Fix the error in accessing the 'category' parameter from the route.

Express

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

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

Abody

Broute

Cparams

Dquery

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.body or req.query to get route parameters

Misspelling 'params'

Route parameters are accessed via req.params, not req.body or others.

4fill in blank

hard

Fill both blanks to create a route that captures 'userId' and 'postId' parameters and sends them back.

Express

app.get('/users/:[1]/posts/:[2]', (req, res) => {
  res.send(`User: ${req.params.userId}, Post: ${req.params.postId}`);
});

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

AuserId

BpostId

Cid

Dpid

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names in the route and in req.params

Forgetting the colon ':' before parameter names

The route path must define both parameters with the exact names used in req.params.

5fill in blank

hard

Fill all three blanks to create a route with parameters 'category', 'id', and 'action' and send a response using them.

Express

app.get('/:[1]/:[2]/:[3]', (req, res) => {
  res.send(`Category: ${req.params.category}, ID: ${req.params.id}, Action: ${req.params.action}`);
});

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

Acategory

Bid

Caction

Ditem

Attempts:

3 left

💡 Hint

Common Mistakes

Using parameter names inconsistently

Missing colons before parameter names

The route path must define parameters 'category', 'id', and 'action' matching the keys in req.params.