Typescript declaration file is not a module

Question

I try to create a typescript declaration file for a sample JS library

my_lib.js :

function f1(a, b) {
  return a + b;
} 
function f2(a, b) {
  return a - b;
}  
module.exports = {
  f1: f1,
  f2: f2 
}

my_lib.d.ts

declare module 'my_lib' {
    function f1(a: number, b: number): number;
    function f2(a: number, b: number): number;   
    export default {
        f1: f1,
        f2: f2 
    }
}

A typescript file try to used the library with

import my_lib from 'my_lib';

I have this error

error TS2656: Exported external package typings file 'C:/.../my_lib.d.ts' is not a module. Please contact the package author to update the package definition.

Any idea? Thanks

Yahiko · Accepted Answer · 2016-07-25 09:39:06Z

1

lib.d.ts is a reserved filename for TypeScript internal library. Do not use it.

answered Jul 25, 2016 at 9:39

Yahiko

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2 Comments

Yoann Augen Over a year ago

Ok, it was just a example, my real file is not the same. I update my post.

Yahiko Over a year ago

I'm using TypeScript 2.0.0 (beta), and I encounter no error. Maybe you could give a try to this new release (npm install typescript@beta -g).

Yoann Augen · Accepted Answer · 2016-07-26 09:42:26Z

1

I solved using export = and import my_lib = require("my_lib"); syntax

answered Jul 26, 2016 at 9:42

Yoann Augen

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