typescript - extend class definition without constructor

Question

I'm using a library which isn't written in TypeScript and thus I've to use the definition file.

Within this definition file there's a class without a constructor (because the original JS code doesn't have a constructor). If I try to extend the class within my code, I get the error:

Error:(36, 2) TS2377: Constructors for derived classes must contain a 'super' call.

If I add super() to the constructor, JavaScript complains:

Uncaught TypeError: _super.call is not a function

How can I modify the definition file so that this code works and the first error from TS is eliminated? (for TypeScript 1.6)

---

Here's a simple example of the definition file (based on backbone-global.d.ts:

declare module Backbone {
    class Events {
        on(eventName: string, callback?: Function, context?: any): any;
        off(eventName?: string, callback?: Function, context?: any): any;
    }

    class ModelBase extends Events {
    ...
    }

    class Router extends Events {
    ...
    }
}

Within my code I have something like:

/// <reference path="libs/typescript/backbone/backbone.d.ts" />

class RosApiManager extends Backbone.Events {

    constructor() {
        super();
    }
}

Answer 1

Backbone.events is not a class (and should not have been declared as such in the .d.ts file). You can't extend something that isn't a class.