Any way to declare a nest class structure in typescript?

Question

I\'m interested in defining an existing framework (openlayers.d.ts) but cannot figure out how to express the fact that OpenLayers.Layer is both a class and a namespace for O

Answer 1

You can use namespace/class merging to get an equivalent effect to nested classes. This example is adapted from Chapter 1 of Pro TypeScript.

You perform merging with a class and a namespace, or with a function and a namespace.

In all cases, the namespace must appear after the class or function for the merge to work.

Adapted example:

class Outer {

}

namespace Outer {
    export class Mid {

    }

    export module Mid {
        export class Inner {

        }
    }
}

var a = new Outer();
var b = new Outer.Mid();
var x = new Outer.Mid.Inner();