BeginnerLesson 17 of 1825 min 路 hands-on
Declaration Files and Libraries
Part of the TypeScript course
You install a library, import it, and your editor lights up with autocomplete, parameter hints and the exact shape of every return value. You install a different library, import it the same way, and get ...
Want to learn TypeScript Declaration Files and Libraries in a real environment?
Click below, get a fresh Linux box with TypeScript ready to go, and work through Declaration Files and Libraries hands-on with an AI tutor that knows your code.
Start this lessonDeclaration Files and LibrariesWhat you'll learn
- .d.ts files
- DefinitelyTyped (@types packages)
- Ambient declarations
- Declare module
- TypeRoots and types option
Read this lesson in your language
All lessons in this course
18 lessons- 1Hello, TypeScript20 min
- 2Type Basics25 min
- 3Arrays and Tuples25 min
- 4Object Types and Interfaces25 min
- 5Functions25 min
- 6Union and Literal Types25 min
- 7Type Narrowing30 min
- 8Type Aliases vs Interfaces20 min
- 9Optional, Readonly, and Nullable25 min
- 10Enums20 min
- 11Generics30 min
- 12Classes25 min
- 13Inheritance and Abstract Classes25 min
- 14Modules25 min
- 15Utility Types30 min
- 16Mapped and Conditional Types30 min
- 17Declaration Files and Libraries25 min
- 18tsconfig and the Compiler30 min
Explore other courses
Python
19 lessons 路 9.3h
Go
20 lessons 路 12.3h
React
17 lessons 路 10.2h
Linux
17 lessons 路 8.5h
Docker
13 lessons 路 6.6h
Git
13 lessons 路 5.9h
Kubernetes
14 lessons 路 8h
Ansible
12 lessons 路 6.1h
Bash
12 lessons 路 5.7h
Helm
10 lessons 路 5.4h
GitLab CI
11 lessons 路 5.8h
Jenkins
11 lessons 路 5.3h
PostgreSQL
14 lessons 路 7.6h
MySQL
13 lessons 路 6.8h
Web
14 lessons 路 5.9h
Vibe Coding
12 lessons 路 5.8h
Prompt Engineering
11 lessons 路 6.2h
Vibe Coding: Fundamentals
12 lessons 路 4.5h
Vibe Coding: Prototype to Production
12 lessons 路 5.5h
Vibe Coding: Multi-Agent Engineering
12 lessons 路 5.3h
Vibe Coding: Advanced Engineering
12 lessons 路 7.3h