Parsing query strings in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Node.js module for parsing query strings.

Node.js

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

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

Aquerystring

Burl

Chttp

Dfs

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'url' instead of 'querystring' for parsing query strings.

Trying to import a non-existent module.

The querystring module is used in Node.js to parse and format URL query strings.

2fill in blank

medium

Complete the code to parse a query string into an object.

Node.js

const parsed = querystring.[1]('name=alice&age=25');

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Astringify

Bencode

Cparse

Dformat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'stringify' which converts an object to a query string.

Using 'format' which is unrelated here.

The parse method converts a query string into a JavaScript object.

3fill in blank

hard

Fix the error in the code to correctly parse the query string.

Node.js

const parsed = querystring.parse('name=alice&age=[1]');

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

Atwenty five

B25

Cage=25

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Putting a phrase with spaces without encoding.

Including key names inside the value.

The query string value should be a simple value like '25', not a phrase or key-value pair.

4fill in blank

hard

Fill both blanks to convert an object to a query string and log it.

Node.js

const obj = { name: 'bob', city: 'nyc' };
const str = querystring.[1](obj);
console.log([2]);

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Astringify

Bobj

Cstr

Dparse

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'parse' instead of 'stringify' to convert object to string.

Logging the object instead of the string.

stringify converts an object to a query string. Then logging the string variable str shows the result.

5fill in blank

hard

Fill all three blanks to parse a query string, update a value, and convert it back to a string.

Node.js

let params = querystring.[1]('color=red&size=medium');
params.[2] = 'large';
const updatedStr = querystring.[3](params);

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

Aparse

Bsize

Cstringify

Dcolor

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to update a property that doesn't exist.

Mixing up parse and stringify methods.

First, parse the string to an object. Then update the 'size' property. Finally, stringify the object back to a query string.