Hands-On Introduction to JavaScript for the Web

Name: Hands-On Introduction to JavaScript for the Web
Rating: 4.6 (20 reviews)

Learn JavaScript fundamentals for the browser by building interactive web features step by step — no slides, just real c

Created byLukasz Kallas

Last updated 5/2026

English

English [Auto],

What you'll learn

What JavaScript is and how it runs in the browser
Variables, data types, operators, and conditional logic
Variables, data types, operators, and conditional logic
Writing and using functions
Understanding and working with the DOM
Selecting and modifying HTML elements with JavaScript
Handling user events like clicks and form submissions
Working with arrays, objects, and loops

Course content

4 sections • 19 lectures • 2h 0m total length

Welcome!3:10
Begin your hands-on journey to web development by learning JavaScript fundamentals in plain HTML, CSS, and JavaScript, with in-browser testing, DOM interaction, and event handling; no frameworks.
Join Our Community0:04
What is JavaScript & How it Works in Browser3:35
JavaScript is a browser-based language that adds behavior to web pages. It runs in the browser after HTML and CSS, through a single-threaded engine, enabling dynamic updates and user interactions.
Setup12:26
Set up a web JavaScript project by creating index.html, style.css, and script.js, load the script at the bottom of the body, and view console output with a live server.

Variables & Types9:29
Learn how to declare variables with let and const, store values, and explore data types such as numbers, strings, booleans, null, and undefined, using JavaScript's type-checking syntax.
Operators14:31
Explore JavaScript operators, including arithmetic, assignment, and comparison operators. Use logical operators and if statements to make decisions in interactive web code.
Conditionals6:25
Master conditionals in JavaScript with if else, else if, and else, including chaining and nesting, plus logical operators to drive interactive web pages.
Functions8:12
Learn to declare and call functions in JavaScript to group reusable logic, use parameters, and return values. See greetings with template strings and console output, and preview DOM interactions later.

DOM3:44
Explore the DOM, the document object model that lets JavaScript access and modify HTML. See how the browser builds a tree of nodes to enable dynamic, interactive web pages.
Element Selection8:17
Learn how to select DOM elements with JavaScript using getElementById, querySelector, and querySelectorAll, targeting by id, class, and CSS selectors to drive page interactions.
Changing Content & Styles9:31
Learn to change page content and styles with JavaScript by updating textContent, injecting HTML with innerHTML, and toggling CSS classes via classList.
Events6:57
Explore how to build interactive web pages by listening for user events with addEventListener, updating the document object model, and toggling classes.
Arrays & Objects7:32
Explore arrays and objects to manage data collections in JavaScript, accessing values by index or dot and bracket notation, and working with arrays of objects like users.
Loops5:54
Learn how to use loops in JavaScript to run code multiple times, iterate over arrays like colors using for and for of, and print each element.
Basic Form9:01
Create a basic form with an input and submit button, intercept the submit event, prevent reload, and read and validate the input to display a dynamic message.
Array & List in Action6:11
Store user input in an array and render a list on the page with JavaScript, showing how push, createElement, and appendChild update the DOM, and clear the input after adding.

Requirements

Basic understanding of HTML and CSS is recommended
No prior JavaScript experience required

Description

JavaScript is what makes the web interactive.

In this course, you’ll learn JavaScript for the browser from scratch, in a practical and beginner-friendly way. We’ll focus on understanding how JavaScript works together with HTML and CSS to create dynamic and interactive web pages.

Just like my other courses in the Hands-On Introduction series, this is a no-slides course. Everything is done directly in the code editor, step by step, so you can follow along and truly understand what’s happening — not just copy and paste code.

We’ll start with the fundamentals of JavaScript and gradually move toward real-world browser use cases, such as manipulating the DOM, handling user events, working with forms, and updating the UI dynamically.

This course is designed to give you a solid foundation that prepares you for modern frontend frameworks like React or Next.js, where many of these concepts are abstracted but still essential to understand.

By the end of this course, you’ll not only understand JavaScript syntax, but also how JavaScript thinks and behaves inside the browser. We’ll explore how the browser loads your code, how scripts interact with HTML elements, and how user actions trigger JavaScript logic. You’ll learn how to debug problems using browser developer tools and understand common mistakes beginners make when working with JavaScript on the web. This knowledge will make learning this modern frontend frameworks in the future much easier and far less confusing.

Who this course is for:

Beginners who want to learn JavaScript for web development
Students who already know HTML and CSS and want to make their pages interactive
People preparing to learn frontend frameworks like React

Hands-On Introduction to JavaScript for the Web

What you'll learn

Explore related topics

Course content

Welcome & Setup4 lectures • 19min

JavaScript Basics4 lectures • 39min

DOM Basics8 lectures • 57min

Ending3 lectures • 6min

Requirements

Description

Who this course is for: