CODEWITHSUNDEEP
typescript
GregRos
GregRos

Reputation: 9113

Importing interface from module with export = statement

Lots of type definition files make use of the export = directive, such as:

declare module "i40" {
    interface RouterStatic {
        () : Router;
    }

    interface RouteInfo {
        params : {
            [key : string] : any;
        };
        splats : string[];
        route : string;
        fn : Function;
        next : any;
    }

    interface Router {
        addRoute(routeString : string, action ?: Function);
        match(test : string) :RouteInfo;
    }

    export = null as RouterStatic;
}

Alternatively, someone might've written code like:

export interface Blah {}
const x = {hi : 5};
export = x;

EDIT: This code used to work once, but as of the current version (2.6), it won't compile. The compiler says that I can't use export = if I export other stuff from the module. Which makes sense.

How do I import one of the interfaces in the module? None of the following works.

import Router = require('i40');
let x : Router.RouteInfo; //RouteInfo not found

import {RouteInfo} from 'i40'; //RouteInfo not found

import * as Router2 from 'i40'; //Error, i40 is not a module

Upvotes: 2

Views: 475

Answers (1)

Richard Matsen
Richard Matsen

Reputation: 23483

I'd say (Ref modules under Ambient Modules)

declare module "i40" {
  interface RouterStatic {
    ...
  }

  interface RouteInfo {
    ...
  }

  interface Router {
    ...
  }

  export { RouterStatic, RouteInfo, Router } as RouterStatic;
}

import * as Router2 from 'i40';
// use as Router2.RouterStatic,  etc

// or  
import { RouterStatic, RouteInfo, Router } from 'i40';
// use as RouterStatic,  etc

Upvotes: 2

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