Why do Typescript definition files not protect members?

Question

This code does not compile if I save it as . 。 This is expected because cantSeeMe is hidden (I would need to export it if I want it to be seen outside the module.

However, if I save the file as it compiles fine. 则可以正常编译。 I would also expect it to not compile.

Why does Typescript not follow the same encapsulation rules when it's compiled as a definition file?

module blah {
  interface cantSeeMe { a: any; }
}

var variable: blah.cantSeeMe;

Answer 1

定义文件中的export关键字是可选的，因为.d.ts文件的整个要点是描述您的公共表面区域。