How to import external type into global .d.ts file [duplicate]

With TypeScript 3.3+ (and maybe since the 2.4 because it’s the version that added support for dynamic imports), you have better ways to solve this isssue, using either:

interface Test {
  date: import('moment').Moment;
}

or

type Moment = import('moment').Moment;
interface Test {
  date: Moment;
}

with no need to export any interfaces 😉