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Programming languages

JavaScript (ES2026)

The planned outline of 32 modules. Lessons are written, run and reviewed before they are published.

Coming soon 32 modules

Coming soon. This track is being written. Below is its planned outline: a lesson appears here once its examples have been run and its technical review is signed off.

Planned outline

  1. Module 1

    Start here: what JavaScript is and how to run it

    Coming soon
  2. Module 2

    Values, types and operators

    Coming soon
  3. Module 3

    Control flow

    Coming soon
  4. Module 4

    Functions, scope and closures

    Coming soon
  5. Module 5

    Objects in depth

    Coming soon
  6. Module 6

    Arrays and array methods

    Coming soon
  7. Module 7

    Strings, Unicode and regular expressions

    Coming soon
  8. Module 8

    Map, Set and weak collections

    Coming soon
  9. Module 9

    Errors and debugging

    Coming soon
  10. Module 10

    Iterators and generators

    Coming soon
  11. Module 11

    Prototypes and classes

    Coming soon
  12. Module 12

    Modules, packages and build tools

    Coming soon
  13. Module 13

    Asynchronous JavaScript

    Coming soon
  14. Module 14

    The event loop in depth

    Coming soon
  15. Module 15

    The DOM

    Coming soon
  16. Module 16

    Browser events

    Coming soon
  17. Module 17

    Forms and accessible interactions

    Coming soon
  18. Module 18

    Network requests

    Coming soon
  19. Module 19

    Storage and browser APIs

    Coming soon
  20. Module 20

    Canvas, animation and web components

    Coming soon
  21. Module 21

    Binary data, workers and performance

    Coming soon
  22. Module 22

    Dates, Temporal and internationalisation

    Coming soon
  23. Module 23

    Metaprogramming

    Coming soon
  24. Module 24

    Modern JavaScript: ES2025, ES2026, ES2027 and beyond

    Coming soon
  25. Module 25

    Functional programming and design patterns

    Coming soon
  26. Module 26

    Testing and code quality

    Coming soon
  27. Module 27

    Node.js essentials

    Coming soon
  28. Module 28

    Security for JavaScript developers

    Coming soon
  29. Module 29

    Browser extensions: WebExtensions and Manifest V3

    Coming soon
  30. Module 30

    Shipping browser extensions: security, testing, cross-browser and stores

    Coming soon
  31. Module 31

    Data structures and algorithms in JavaScript

    Coming soon
  32. Module 32

    JavaScript interview preparation

    Coming soon

Related tools

JavaScript Formatter Turn minified or messy JavaScript into readable, consistently indented code. JavaScript Minifier Shrink JavaScript for production with Terser, in your browser, with a source map. JSON Formatter Pretty-print, minify and fix JSON with exact error locations. Regex Tester Live matches, capture groups and replace preview — safe from runaway patterns. HTML to JSX Converter Paste HTML or SVG, get React JSX that renders exactly the same.

Official documentation

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