What is the scope of a type alias?

问题

What is the scope of a typescript type alias? I have this alias and I think that I might want to declare it globally somehow:

type ResouceResult<T> = T & {
    $promise: ng.IPromise<T>,
    $resolved: boolean
};

回答1:

Section 3.9 of Typescript 1.5 language specification: http://www.typescriptlang.org/Content/TypeScript%20Language%20Specification.pdf

3.9 Type Aliases

A type alias declaration introduces a type alias in the containing module

so module

回答2:

declare it globally

If your file is a global, the type alias is global. If its a module, the type alias is a module.

More on this https://basarat.gitbooks.io/typescript/content/docs/project/modules.html

来源：https://stackoverflow.com/questions/33436192/what-is-the-scope-of-a-type-alias