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JavaScript Tutorial

Make web pages interactive with modern JavaScript, from the basics to async code and ES2026.

45 free lessons Beginner to Intermediate Covers ECMAScript 2026

Start the first lesson

Getting Started

  1. 1JavaScript Introduction
  2. 2Adding JavaScript to a Page
  3. 3Output & the Console
  4. 4Syntax, Statements & Comments
  5. 5Variables: let and const
  6. 6Data Types

Operators & Logic

  1. 7Operators
  2. 8Strings & Template Literals
  3. 9Numbers & Math
  4. 10Booleans & if...else
  5. 11switch Statements
  6. 12Nullish Coalescing & Optional Chaining
  7. 13Loops
  8. 14for...of and for...in

Functions

  1. 15Functions
  2. 16Arrow Functions
  3. 17Scope, Hoisting & Closures
  4. 18Callbacks & Higher-Order Functions

Arrays & Objects

  1. 19Arrays
  2. 20Array Methods
  3. 21Objects
  4. 22Destructuring, Rest & Spread
  5. 23Map & Set
  6. 24Dates & Intl Formatting

Classes

  1. 25Classes
  2. 26Inheritance & Prototypes
  3. 27The this Keyword

The DOM & Browser

  1. 28The DOM: Selecting Elements
  2. 29Changing the DOM
  3. 30Events
  4. 31Working with Forms
  5. 32localStorage & sessionStorage
  6. 33Timers & Animation Frames
  7. 34Browser APIs: URL, History & More (coming soon)

Asynchronous JavaScript

  1. 35How Asynchronous Code Works
  2. 36Promises
  3. 37async & await
  4. 38Fetch API
  5. 39JSON

Modern JavaScript

  1. 40Modules
  2. 41Errors & Exceptions
  3. 42Iterators, Generators & Iterator Helpers
  4. 43Proxy & Reflect (coming soon)
  5. 44Regular Expressions
  6. 45What's New in ES2025 & ES2026
  7. 46Debugging with DevTools
  8. 47Best Practices & Security
  9. 48Project: To-Do App (coming soon)

Learn JavaScript with a mentor

Free lessons get you started. Our Full Stack Web Development training adds real projects and code reviews from working developers.

  • Project-based learning
  • Mentor code reviews
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