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hands-on lab

Working with JavaScript Objects

Difficulty: Beginner
Duration: Up to 40 minutes
Students: 956
Rating: 3.9/5
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Description

In this lab, you will be working with JavaScript objects. An object is a collection of properties, and a property is an association between a name and a value. Also known as key-value pairs. Object properties are unordered. Object values are accessed through the corresponding property name. Objects in JavaScript can be compared to real-world items such as cars or a user.

In this lab, you will declare an object and use both dot notation and square bracket notation to access, add, and change property values. Each check will ask you to output data to the console.

Learning Objectives

Upon completion of this lab, you will be able to:

  • Declare a JavaScript Object
  • Access the value of an object property
  • Add to and replace property values of an object

Intended Audience

  • Beginners learning front-end development
  • Software Engineers who need to learn front-end technologies to expand their skillset

Prerequisites

The following content can ensure your success:

Updates

March 22, 2022 - The test system has been updated to allow the use of single or double quotes.

December 2nd, 2021 - Start the code environment with an empty JavaScript file

November 23rd, 2021 - Resolved an issue causing the checks to unexpectedly fail in some cases

Covered topics

Development
Javascript

Lab steps

Introduction to JavaScript Labs
Declare an object
Add an Object property
Replace a property value
Add a property bracket notation
Replace property array value

Lab Rules