JavaScript & TypeScript — Zero to Hero

4h 8m total

A complete, hands-on journey from your first Node.js install to shipping an idiomatic, fully typed, tested TypeScript application. Built on Node.js 24 (the current LTS), ECMAScript 2025, and TypeScript 6, it mixes prose, runnable code, MCQ checks, output-prediction drills, ordering and matching activities, an embedded sandbox, environment checklists, and mentor-chat prompts so every skill is rehearsed in the format that fits it best. You start in plain JavaScript, then layer TypeScript on top the way real teams do.

JavaScript CoreTypeScript CoreProgramming FundamentalsCareer SWE Foundations

Sign in to enroll

Includes:

Cheat sheet
Progress tracking
Audio narration
Mentor context
Certificate of completion

Outline

Enroll to unlock

1.
Getting Set Up: Node, npm, the REPL, and Your First Program
26 min3 lessons
1. Locked — enroll to unlock. Install Node.js and verify it works8 min
2. Locked — enroll to unlock. The REPL and your first program8 min
3. Locked — enroll to unlock. npm, package.json, and your editor10 min
2.
Syntax, Variables, and Core Types
28 min3 lessons
1. Locked — enroll to unlock.

Sign in to enroll

Includes:

Cheat sheet
Progress tracking
Audio narration
Mentor context
Certificate of completion

Outline

Enroll to unlock

1.
Getting Set Up: Node, npm, the REPL, and Your First Program
26 min3 lessons
1. Locked — enroll to unlock. Install Node.js and verify it works8 min
2. Locked — enroll to unlock. The REPL and your first program8 min
3. Locked — enroll to unlock. npm, package.json, and your editor10 min
2.
Syntax, Variables, and Core Types
28 min3 lessons
1. Locked — enroll to unlock.

Variables: let, const, and (not) var6 min

Core types and template literals10 min

Operators, coercion, and equality12 min

3.

Control Flow: Branches, Loops, and Iteration

24 min3 lessons

Locked — enroll to unlock. Conditionals: if, ternary, switch8 min
Locked — enroll to unlock. Loops8 min
Locked — enroll to unlock. Iterating collections8 min

4.

Functions, Closures, and Arrow Functions

28 min3 lessons

Locked — enroll to unlock. Declaring functions10 min
Locked — enroll to unlock. Scope, hoisting, and closures10 min
Locked — enroll to unlock. this, and higher-order functions8 min

5.

Arrays, Objects, Maps, and Sets

28 min3 lessons

Locked — enroll to unlock. Arrays10 min
Locked — enroll to unlock. Objects8 min
Locked — enroll to unlock. Map, Set, and ES2025 helpers10 min

6.

Objects, Prototypes, and Classes

28 min3 lessons

Locked — enroll to unlock. Objects and prototypes8 min
Locked — enroll to unlock. Classes10 min
Locked — enroll to unlock. Inheritance and composition10 min

7.

TypeScript: Types, Interfaces, and Generics

28 min3 lessons

Locked — enroll to unlock. Why TypeScript, and getting it running10 min
Locked — enroll to unlock. Shaping data: interfaces, unions, and literals8 min
Locked — enroll to unlock. Narrowing and generics10 min

8.

Async, Promises, Modules, and Error Handling

26 min3 lessons

Locked — enroll to unlock. Callbacks, the event loop, and Promises10 min
Locked — enroll to unlock. async/await and error handling8 min
Locked — enroll to unlock. Modules8 min

9.

Testing, Tooling, and a Real Capstone

32 min3 lessons

Locked — enroll to unlock. Testing your code8 min
Locked — enroll to unlock. Tooling and quality gates8 min
Locked — enroll to unlock. Capstone: a typed CLI task tracker16 min

Outline

Getting Set Up: Node, npm, the REPL, and Your First Program

Syntax, Variables, and Core Types

Outline

Getting Set Up: Node, npm, the REPL, and Your First Program

Syntax, Variables, and Core Types

Control Flow: Branches, Loops, and Iteration

Functions, Closures, and Arrow Functions

Arrays, Objects, Maps, and Sets

Objects, Prototypes, and Classes

TypeScript: Types, Interfaces, and Generics

Async, Promises, Modules, and Error Handling

Testing, Tooling, and a Real Capstone