TypeScript是否支持命名空间类的类声明？

Question

I'm converting JavaScript code to TypeScript, and stuck on the best way to convert my class definitions.

They are extended from Marionette, and the class names are namespaced. For example, this JavaScript using the 'xyz' namespace:

xyz.Marionette.AppRouter = Marionette.AppRouter.extend({
    instance_name: "AppRouter",

     functionName: function(options) {
     }
});

I tried creating this class command equivalent in TypeScript:

class xyz.Marionette.AppRouter extends Marionette.AppRouter {

but this syntax does not seem supported.

Is is possible declare a class in TypeScript with namespacing?

The answers below (so far) are helpful, but I still don't know how to express this definition, or even if it's possible.

Answer 1

class nameSpace.Marionette.AppRouter extends Marionette.AppRouter {

Declare the namespace and then the class:

namespace nameSpace.Marionette {
    export class AppRouter {

    }
}

Answer 2

I tried mocking this up but had a problem referencing the base AppRouter because the namespaces are the same. It works if I add a qualifier of "base" to the first namespace..

namespace base.Marionette {

    export class AppRouter {

        Foo() {
            return "Hello";
        }
    }
}

namespace nameSpace.Marionette {

    export class AppRouter2 extends base.Marionette.AppRouter {

        Bar() {
            var hello = this.Foo();
        }
    }
}