TypeScript 'using' [duplicate]

Question

In C# one can use a using clause at the top of your file, which enables the use of types within that namespace without explicitly having to specify the full namespace to reference those types. Does TypeScript provide an alternative for that?

Answer 1

In TypeScript the closest you can come to being able to directly use external modules is aliasing. As shown in the TypeScript Handbook, it is used like this:

module Shapes {
    export module Polygons {
        export class Triangle { }
        export class Square { }
    }
}

import polygons = Shapes.Polygons;
var sq = new polygons.Square(); // Same as 'new Shapes.Polygons.Square()'

This doesn't put the interfaces on the root scope of the module because this could introduce naming conflicts if the Polygons module was updated and makes it clear that you are referencing something external.