JavaScript for Absolute Beginners: Start from Zero

Learn JavaScript from scratch: environment setup, variables, functions, loops, objects, and classes — in about 2 hours

New

Created byOlena Khvorostianenko

Last updated 8/2026

English

What you'll learn

Set up a complete development environment: Node.js, Visual Studio Code, and Git on Windows, macOS, or Ubuntu
Write your first JavaScript programs using variables, data types, strings, and operators
Control the flow of your code with conditions, loops, and functions, and understand variable scope and closures
Handle errors with try...catch and work with timers: setTimeout and setInterval
Create and use objects and classes, and understand inheritance and polymorphism
Read and understand JavaScript code with confidence — not just copy it

Course content

3 sections • 27 lectures • 1h 36m total length

Introduction1:32

Environment Setup – Tools for Local Development2:42
Understand what a working environment is in the context of local development
Learn the role of VS Code, Node.js, and Git in test automation workflows
Get familiar with essential features of each tool
Recognize OS-specific considerations (Windows, macOS, Ubuntu)
Installing Node.js on macOS3:02
Download and install Node.js on macOS
Understand the difference between LTS and current versions of Node.js
Complete the installation using a system installer
Verify the installation via terminal or command prompt
Recognize the role of npm as a package manager for JavaScript tools
Installing Visual Studio Code on macOS2:51
Follow step-by-step instructions for downloading and installing VS Code
Understand macOS permissions: granting file access and trusting workspace folders
Launch and explore the interface for the first time
Set up your development folder and get ready to write code
Installing Git on macOS2:21
Learn how to install Git on macOS using Homebrew
Verify if Homebrew is already installed
Use the official command to install Homebrew if needed
Install Git using Homebrew
Verify installation in the terminal
Installing Node.js on Windows2:32
Download and install Node.js on Windows
Understand the difference between LTS and current versions of Node.js
Complete the installation using a system installer
Verify the installation via terminal or command prompt
Recognize the role of npm as a package manager for JavaScript tools
Installing Visual Studio Code on Windows2:41
Navigate to the official VS Code website and download the installer
Complete the setup using the guided installation wizard
Choose preferred options such as Start Menu shortcuts and file associations
Launch VS Code and explore initial settings
Prepare your workspace for writing and testing code
Installing Git on Windows2:27
Download Git for Windows from the official sources
Walk through the setup wizard using default settings
Complete installation and uncheck release notes
Open Command Prompt
Verify installation in the terminal
Installing Visual Studio Code on Ubuntu3:00
Download the correct .deb package for your system architecture
Install VS Code via the Software Installer with sudo password access
Learn where to find VS Code in the Applications Menu
Understand workspace setup on Linux systems
Launch the editor and begin customizing your coding environment
Installing Node.js on Ubuntu2:20
Download and install Node.js on Ubuntu
Understand the difference between LTS and current versions of Node.js
Complete the installation using a terminal commands
Verify the installation via terminal or command prompt
Recognize the role of npm as a package manager for JavaScript tools
Installing Git on Ubuntu2:00
Open the terminal from the Applications Menu
Add the latest Git repository
Install and verify Git using standard terminal commands

Declaring Variables in JavaScript5:38
How to declare variables.
The difference between reassignment and redeclaration.
Why let and const are preferred over var.
What happens when you try to reassign a constant or redeclare a let.
How to use single-line and multi-line comments in JavaScript.
How to write and run JavaScript in VS Code and CodePen.
Understanding Data Types in JavaScript4:52
What data types exist in JavaScript.
How to use typeof to check the type of any variable.
What distinguishes null from undefined.
Why objects are powerful structures for storing collections.
Working with Strings: Concatenation and Template Literals3:07
How to combine variables and strings using the "+" operator
Why template strings offer a cleaner and more readable syntax
How to embed variables inside strings using ${}
When to use backticks instead of quotes
Using Arithmetic and Assignment Operators4:01
How to perform basic <b>arithmetic operations</b>: +, -, *, /, %
How pre-increment and post-increment operators work (++x, x++)
How to use assignment operators like +=, -=, *=, /=, %=
When to use these operators in real-world code (e.g., loops, calculations)
How operator order and value mutation affect your variables
Logical Thinking: Comparison and Logical Operators5:12
How to use comparison operators like >, <, >=, <=, ==, ===, !=, and !==
How to use logical operators: && (AND), || (OR), and ! (NOT)
The difference between loose equality (==) and strict equality (===)
How to combine comparison and logical operators to build more complex conditions
How these tools help implement logic and decision-making in your code
Defining and Calling Functions4:28
How to declare and call functions in JavaScript
The difference between function declarations and arrow functions
How to define functions with or without parameters
How to use return to send values from a function
How implicit return works in arrow functions
When to use concise vs. block body syntax with arrow functions
Understanding Variable Scope5:03
What scope means in JavaScript
The difference between global, function, and block scopes
How var, let, and const behave differently in each scope
Why scoping matters for organizing code and avoiding bugs
Mastering Closures2:40
What closures are and how they work
How inner functions retain access to outer function variables
A practical example using a counter to demonstrate closures
Why closures are useful for maintaining private state
Timers in JavaScript: setTimeout and setInterval4:25
What setTimeout and setInterval do
How to delay code execution
How to repeat code at fixed intervals
How to stop scheduled functions using clearTimeout and clearInterval
Controlling Code Flow: if, else, and Ternary Operator4:40
How to control program flow using if, else if, and else
How to write conditions that execute different blocks of code
How to simplify short conditions using the ternary operator
Loops Explained: for, while, and do-while4:26
Use different types of loops: for, while, and do-while
Control loop execution with break and continue
Understand when to use each loop type depending on the scenario
Advanced Loops: for...of and for...in2:35
Use for...of to iterate over arrays and strings
Use for...in to loop through object properties
Understand the key differences between these two loop types
Handling Errors: try...catch and Best Practices5:09
Understand how try, catch, and finally work in JavaScript
Learn how to handle runtime errors gracefully
Use throw to raise custom errors when needed
Practice writing stable code that avoids unexpected crashes
Working with Objects in JavaScript5:15
Create and use JavaScript objects
Access object properties using dot and bracket notation
Add, update, and delete properties
Check if a property exists
Iterate over object keys and values using for...in
Creating and Using Classes and Methods4:01
Understand the purpose of JavaScript classes
Create a class using the class keyword
Use a constructor to initialize properties
Define and call methods on class instances
Create multiple objects from a single class
Inheritance and Polymorphism Made Simple3:22
Understand how to create a subclass using extends
Use super() to call the parent class constructor
Override methods in a subclass
Explain how polymorphism works in JavaScript classes

Requirements

No programming experience needed — this course starts from absolute zero
A computer with Windows, macOS, or Ubuntu and an internet connection
Willingness to type the code yourself and experiment — that is how you learn

Description

Have you ever thought that programming is not for you? This course is here to prove otherwise.

JavaScript for Absolute Beginners is a short, practical course for people who have never written a single line of code. No IT background, no computer science degree, no previous experience — just you, your computer, and about two hours of your time.

JavaScript is the language of the web. Every website you open, every button you click, every form you fill in — there is a very good chance that JavaScript is behind it. It is also one of the friendliest languages to start with, because you can see the result of your code immediately.

What you will learn:

How to set up a real development environment on your own computer: Node.js, Visual Studio Code, and Git — with step-by-step lectures for Windows, macOS, and Ubuntu
Variables, data types, and working with strings
Operators and how to make your code take decisions with if, else, and the ternary operator
Functions, variable scope, and closures
Loops: for, while, do-while, for...of, and for...in
Timers, error handling with try...catch, and best practices
Objects, classes, methods, inheritance, and polymorphism

We go further than most beginner courses do — because these are the topics that separate someone who copies code from someone who understands it.

The course is short on purpose: no long theory, no slides you will forget. Short lectures, practical examples, and code you can repeat right away.

Two hours will not make you a professional developer. But they will give you a working environment, a real foundation, and no more fear of code. And that is usually the hardest step.

Enroll now — and let's write your first program together

Who this course is for:

Complete beginners who have never written a single line of code and want to start programming with JavaScript
Anyone who has tried to learn programming before, felt lost, and wants a short, friendly restart

JavaScript for Absolute Beginners: Start from Zero

What you'll learn

Explore related topics

Course content

Introduction1 lecture • 2min

Environment Setup10 lectures • 26min

JavaScript Fundamentals16 lectures • 1hr 9min

Requirements

Description

Who this course is for: