"TypeScript Tutorial" is a TypeScript open source tutorial that introduces basic concepts and usage for beginners.
Read online: https://wangdoc.com/typescript/
Open source address: https://github.com/wangdoc/typescript-tutorial
Ruan Yifeng said that when this tutorial was almost finished in March this year, TypeScript 5.0 was released suddenly. Decorators use a new syntax. So he rewrote the chapter, so decorators now have two chapters, the new syntax and the old syntax , because TypeScript supports both.