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Please help me fix this compilation error.

Below you can see the compiler complaining that the Actions object on line 20 (I removed a few lines for clarity before posting this) is {}: enter image description here

But below you can see in actions.ts that Actions is an object of type Actions, and it has the requested property (which is a function): enter image description here

And in the base code you can see in the DefinitelyTyped Alt definition that createActions should return an object of type Actions: enter image description here

So why is Typescript complaining that Actions is not of type Actions?

Richard
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    This was hard to read! In the future, please paste your code directly, and maybe mark relevant parts using comments like `// HERE` – mk. Dec 09 '15 at 20:34

1 Answers1

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You're using a module called "app/actions/actions". That module is actually not a module (a map of properties), but whatever's the result of flux.createACtions(Actions):

export = flux.createActions(Actions); // in actions.ts

What does that return? Because you're not specifying the generic for <T>, and because the params of createActions don't correctly include a T from which it could infer, it assumes that T is just {}. This was discussed here and ultimately declined. So, as mentioned, you need to specify the generic:

export = flux.createActions<Actions>(Actions);

But to avoid this, you could change your local (or remote) alt.d.ts to be something like:

class Alt {
    createActions<T extends ActionsClass>(con: ActionsClassConstructor<T>, ...): T;
}
type ActionsClassConstructor<T extends ActionsClass> = new (alt:Alt) => T;

This adds the generic type info needed to correctly infer based on the constructor you supply.

mk.
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