TypeScript
带类型的 JavaScript，及早发现 bug。
TypeScript is JavaScript plus a type system that catches bugs before your code runs, and it is one of the most popular languages in web development. This track takes you from your first type annotation to the patterns real-world apps use every day: object types, unions and narrowing, generics, utility and mapped types, satisfies, and validating API data at runtime.
You already know JavaScript, so every lesson goes straight to what TypeScript adds, and the quizzes make sure you truly understand what the compiler does.
- 课时
- 23
- 时长
- 3 小时
- 级别
- 中级
本课程的内容目前为英文。
- 铜牌 可挑战
- 银牌 可挑战
- 金牌 未解锁
准备好证明自己了吗？
三场考试正等着你：铜牌、银牌和金牌。
学完后你将能够
- Set up a strict TypeScript project and know what tsc and Node.js each do
- Describe posts, users and API responses with precise types
- Model API states with discriminated unions and let the compiler check every case
- Write reusable generic functions and types
- Derive new types with utility, mapped and conditional types
- Validate JSON from the network so your types tell the truth
学习旅程
1 第 1 单元Why TypeScript
What types buy you, how tsc and tsconfig work, and how Node.js runs TypeScript files.
0 / 32 第 2 单元Everyday types
Primitives, inference, arrays, tuples, literal types, and the difference between any and unknown.
0 / 43 第 3 单元Modeling objects
Describe posts, users and API payloads with interfaces, type aliases and Record.
0 / 44 第 4 单元Unions and narrowing
Values that can be one of several types, and how TypeScript follows your checks.
0 / 45 第 5 单元Generics
Write one function or type that works for many types without losing safety.
0 / 36 第 6 单元Advanced types in practice
Utility, mapped and conditional types, satisfies, as const, and validating JSON at runtime.
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