Object creation in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an empty object named person.

Javascript

const person = [1];

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

A{}

B[]

Cnull

D''

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets creates an array, not an object.

Using quotes creates a string, not an object.

Use curly braces {} to create an empty object in JavaScript.

2fill in blank

medium

Complete the code to create an object car with a property make set to 'Toyota'.

Javascript

const car = [1];

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

Amake: 'Toyota'

B['make', 'Toyota']

C('make', 'Toyota')

D{make: 'Toyota'}

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets creates an array, not an object.

Leaving out curly braces causes syntax errors.

Use curly braces with key-value pairs to create an object with properties.

3fill in blank

hard

Fix the error in the code to create an object book with a property title set to 'JavaScript'.

Javascript

const book = [1];

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

A{title: 'JavaScript'}

B{title = 'JavaScript'}

C[title: 'JavaScript']

D(title: 'JavaScript')

Attempts:

3 left

💡 Hint

Common Mistakes

Using equals sign = instead of colon : in object literals.

Using square brackets or parentheses instead of curly braces.

Use colon : to assign values to keys in objects, not equals =.

4fill in blank

hard

Fill both blanks to create an object user with properties name and age.

Javascript

const user = [1] name[2] 'Alice', age: 30 };

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

A{

B[

C:

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets instead of curly braces to start the object.

Using equals sign = instead of colon : for properties.

Objects start with { and properties use colon : to assign values.

5fill in blank

hard

Fill all three blanks to create an object product with properties id, name, and price.

Javascript

const product = [1] id[2] 101, name[3] 'Pen', price: 1.5 };

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

A{

B:

C,

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using equals sign = instead of colon :.

Forgetting commas between properties.

Start the object with {, use colon : to assign values, and separate properties with commas ,.