JavaScript Tutorials

Lesson 1

What is JavaScript? — The Language That Makes Websites Interactive

JavaScript brings web pages to life. Learn what JavaScript is, what it can do, and run your first script in un...

Beginner 2 min

Lesson 2

JavaScript Variables — var, let, and const Explained

Variables store data in JavaScript. Learn the difference between var, let, and const, when to use each, and ho...

Beginner 2 min

Lesson 3

JavaScript Data Types — Strings, Numbers, Booleans and More

JavaScript has 8 data types. Learn strings, numbers, booleans, null, undefined, and how to check what type a v...

Beginner 3 min

Lesson 4

JavaScript Operators — Arithmetic, Comparison & Logical

Operators are the building blocks of logic in JavaScript. Learn arithmetic, comparison, logical, and assignmen...

Beginner 3 min

Lesson 5

Strings: Working with Text and Template Literals

Learn to create, join, search, cut and format text in JavaScript with template literals and string methods, an...

Beginner 11 min

Lesson 6

Numbers and Math: Bills, Discounts and Rounding

Learn how JavaScript handles numbers, rounding, random values and text to number conversion, and build a resta...

Beginner 10 min

Lesson 7

JavaScript Conditionals — if, else, and switch

Conditionals let your code make decisions. Learn if, else if, else, switch statements, and build real features...

Beginner 3 min

Lesson 8

JavaScript Loops — for, while, and for...of

Loops repeat a block of code. Learn for, while, for...of, and for...in loops with real examples like rendering...

Beginner 2 min

Lesson 9

JavaScript Functions — Writing Reusable Code Blocks

Functions let you write code once and reuse it anywhere. Learn function declarations, arrow functions, paramet...

Beginner 2 min

Lesson 10

JavaScript Arrays — Working with Lists of Data

Arrays store multiple values in one variable. Learn how to create, access, and manipulate arrays using push, p...

Beginner 3 min

Lesson 11

JavaScript Objects — Key-Value Pairs and Methods

Objects store related data together in key-value pairs. Learn how to create, access, update, and work with obj...

Beginner 3 min

Lesson 12

DOM Manipulation — Changing HTML with JavaScript

The DOM is the live representation of your HTML. Learn how to select, modify, create, and delete elements usin...

Beginner 3 min

Lesson 13

Events: Responding to Clicks, Typing and Forms

Make web pages react to clicks, typing, keys and form submissions with addEventListener, and build a canteen f...

Beginner 15 min

Lesson 14

Debugging: Finding and Fixing Bugs with the Console and DevTools

Learn to read JavaScript error messages, inspect values with console.log, typeof and console.table, and pause ...

Beginner 11 min