从.d.ts文件导出和导入Typescript类型别名

Question

I would like to have a file such as vue-number.d.ts with a declaration along the lines of:

export type vueNumber = number | '';

and then be able to use the type alias across multiple typescript modules.

If I use the above code, the import statement has 'vue-number.d.ts' is not a module

How can I export and import a typescript type, which I can then use as if it was declared in the same module - ie let age: vueNumber = ''; ?

Answer 1

If you want to use a declaration file, then remove export from vue-number.d.ts :

type vueNumber = number | '';

... and include the declaration file as a reference:

///<reference path="vue-number.d.ts"/>
let age: vueNumber = '';