What you will learn

Identify and use all primitive and reference data types in JavaScript.

Apply type conversion and coercion in real-world scenarios.

Manipulate strings, numbers, and booleans with practical coding examples.

Work with arrays and objects to store and process complex data.

Understand the nuances of null, undefined, and symbol types.

Test your knowledge with quizzes to reinforce key concepts.

Course content

Master how JavaScript represents, stores, and manipulates data through practical, real-world examples. Explore primitive and reference types, work with arrays and objects, and understand how …

Explore the core ideas behind JavaScript's type system and understand the differences between primitive and reference values. Work with strings and practice common string operations used in real applications.

Work with the most essential primitive types. Perform number operations, avoid common pitfalls, and use booleans and logical operators to shape program behavior and flow.

Go deeper into data handling with null, undefined, and symbols. Build and modify array structures while understanding how reference types behave in memory and within real-world code.

Work with objects, nested structures, and dynamic properties. Master both explicit and implicit type conversion to understand how JavaScript transforms data during comparisons, calculations, and real program execution.

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Introduction to JavaScript

Learn the fundamentals of JavaScript, the backbone of dynamic web development. Discover essential concepts like syntax, variables, data types, and operators. Explore how to use conditional statements, loops, and functions to create interactive and efficient programs. Master the building blocks of JavaScript and lay the groundwork for more advanced programming skills.

JavaScript Data Structures

Learn to work confidently with data in JavaScript by mastering objects and arrays. Understand how to create, access, and manage object properties and methods effectively. Dive into advanced object manipulation techniques, including iteration, cloning, and destructuring for cleaner code. Build a strong foundation in working with arrays and learn to manage, iterate, and modify array elements efficiently. Master advanced array methods like map, filter, find, and sort to transform and handle data effectively in your applications.

JavaScript Logic and Interaction

Master essential JavaScript concepts, including classes, DOM manipulation, event handling, and asynchronous programming. Learn to create dynamic and interactive web applications by managing user interactions, fetching and displaying data, and handling asynchronous operations efficiently. Through a blend of theory, hands-on challenges, and real-world examples, this course equips you with the practical skills needed for modern web development.

React Tutorial

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Introduction to QA

In this course, the user will get an introduction on how to perform manual testing on primarily web applications. The skills aquired in this course can be used in automation testing as well.

Test explain sentence

hover on sentence and explain it

Introduction to JavaScript

Learn the fundamentals of JavaScript, the backbone of dynamic web development. Discover essential concepts like syntax, variables, data types, and operators. Explore how to use conditional statements, loops, and functions to create interactive and efficient programs. Master the building blocks of JavaScript and lay the groundwork for more advanced programming skills.

JavaScript Data Structures

Learn to work confidently with data in JavaScript by mastering objects and arrays. Understand how to create, access, and manage object properties and methods effectively. Dive into advanced object manipulation techniques, including iteration, cloning, and destructuring for cleaner code. Build a strong foundation in working with arrays and learn to manage, iterate, and modify array elements efficiently. Master advanced array methods like map, filter, find, and sort to transform and handle data effectively in your applications.

JavaScript Logic and Interaction

Master essential JavaScript concepts, including classes, DOM manipulation, event handling, and asynchronous programming. Learn to create dynamic and interactive web applications by managing user interactions, fetching and displaying data, and handling asynchronous operations efficiently. Through a blend of theory, hands-on challenges, and real-world examples, this course equips you with the practical skills needed for modern web development.

React Tutorial

test course with sections with quiz

test

Introduction to QA

In this course, the user will get an introduction on how to perform manual testing on primarily web applications. The skills aquired in this course can be used in automation testing as well.

Why People Choose Codefinity

Web Developer

Kwizera Mugisha

The teaching methodology at Codefinity is excellent, and I particularly appreciate how it has prepared me to handle real-world coding problems. Currently, I am delving into Node.js and eagerly anticipate building full-stack projects that integrate all the knowledge I have gained.

Senior Business Analyst

Sherry Barnes-Fox

My first course was 4 hours, I did it in a few days, "nugget-style". The instructions are very clear and easy to understand. There is even a hint to help you get the answer. I love the learning style that is used, it engages me.

Accounts Payable Specialist

Bill Wagner

I have really liked the browser-based lessons that allow me to code within the lesson. The RUN button allows me to test the code I write before submitting for a grade.

IT Support Specialist

Daniel Chinea

I have gained a lot of practical and logical thinking skills, along with patience for myself and confidence in myself that I can learn programming. Years ago, I would have never thought that I could learn programming in any way, shape or form, and I was able to obtain these certifications and skills with Codefinity.

Technology Project Manager

Steve Bruening

The learning was progressive and made it easy to follow along and make progress. I could feel my skills increasing and building on each other as the course went along.

Project Manager

Stephanie Chan

As I went through the first course of the Python track, I liked the way the course was lay out (in easy and digestible modules) with little exercises at the end of each concept.

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Solve Real‑World Coding Tasks

Interactive coding environment

Jump into our interactive environment: write and run your code with real‑time feedback and success metrics—learn by doing at every step.

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Leverage the built‑in AI assistant to explain errors, suggest fixes, or answer any question about your code—so you stay productive and never get stuck.

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Knowledge check

Wrap up each module with a quick quiz that delivers instant feedback, tracks your progress, and ensures you’ve mastered key concepts.

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One subscription opens up this course and our entire catalog of projects and skills.

Features:

250+ Top-Rated coursesCutting-edge AI Copilot

Personalized study tracks40+ hands-on real-world projects

Without cancellation, before the selected discounted intro plan ends, I accept that Codefinity will automatically charge $79 every 3 months until I cancel. Learn more about cancellation and refund policy in Subscription Terms.

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To welcome you to Codefinity, we're offering up to 64% off on our courses. Plus, we have a 30-day money-back guarantee, so you can try us out risk-free.We truly look forward to welcoming you to our platform and are committed to making your learning experience easy, interactive, and fun.

Frequently Asked Questions

How do I get access to the platform?

While you can study with Codefinity on any device, we strongly recommend using a computer or laptop to optimize your learning experience.

What if I have questions while learning?

All our courses feature an integrated AI assistant, ready to assist you with any questions you may have during your studies and help you solve any problems.

Is a tech degree necessary for learning?

No, you don't need any previous experience to start learning. Our courses are designed for beginners, so you can easily start your journey in the tech industry

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JavaScript Data Types Foundations

Course for Beginner Level

What you will learn

Course content

Your subscription also includes 250+ courses:

Why People Choose Codefinity

Step-by-Step to Stellar Results

Trusted by Employees of Leading Companies
and Students from Top Universities

Instantly access 250+ courses

Full catalog access

Try Codefinity with confidence – 30-day money-back guarantee included

Frequently Asked Questions

Still have questions?

JavaScript Data Types Foundations

Course for Beginner Level

What you will learn

Course content

Your subscription also includes 250+ courses:

Why People Choose Codefinity

Step-by-Step to Stellar Results

Trusted by Employees of Leading Companies and Students from Top Universities

Instantly access 250+ courses

Full catalog access

Try Codefinity with confidence – 30-day money-back guarantee included

Frequently Asked Questions

Still have questions?

Trusted by Employees of Leading Companies
and Students from Top Universities