Learning JavaScript & TypeScript
One book, the whole language — and its typed superpower. Parts I–III build JavaScript from your first console.log to closures, prototypes, async, generators and regular expressions — then you apply it all in a playable text-adventure capstone. Part IV layers TypeScript on top: shapes, unions and narrowing, generics, mapped types, the type-level toolbelt and pro-grade patterns, capped with a final exam. 27 chapters, beginner to pro, all original, fully hands-on with live editable examples in every lesson.
- TypeScript
- 157 lessons
- ~31 hours
- Free
- by Fishbones
Learn TypeScript for free on Libre Academy with the Learning JavaScript & TypeScript course: 157 interactive lessons you complete by writing real code in a built-in editor, graded instantly by hidden tests. No paywall, no sign-up — it runs in your browser and the free desktop app.
What you get
- Hands-on lessons with a real editor and instant, test-graded feedback.
- Free and open source — no account required to start.
- Runs in your browser, and offline in the free desktop app.
- TypeScript runs in your browser.
What's inside
- Hello, JavaScript
- Values & Types
- Variables & Operators
- Control Flow
- Functions
- Arrays
- Objects
- The Big Array Methods
- Strings in Depth
- Destructuring & Modern Syntax
- Maps, Sets & Iterables
- Dates, Math & Practical Numbers
- Closures & Higher-Order Functions
- this, Prototypes & Classes
- Errors & Defensive Code
- Asynchronous JavaScript
- Iterators & Generators
- Regular Expressions
- Modules & the Ecosystem
- Project: Text Quest
- Enter TypeScript
- Shaping Objects
- Unions & Narrowing
- Generics
- Classes & Advanced Types
- The Type-Level Toolbelt
- Pro TypeScript & Capstone
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