Declaration file for function-module (TypeScript)

Question

I use a node module that's not found by typings and doesn't exist in definelytyped.

the basic use of the module is:

import * as someFunc from 'some-module';

someFunc("some string");

As you can see, this module exports a function as its default. I haven't figured out how to write the declaration file for it.

This is the best I managed to do:

declare module 'some-module' {
    export default function someFunc(someArg: string): void;
}

BTW it does work JavaScriptly. It's only the TypeScript bothers me.

Any ideas how to solve that?

Martijn · Accepted Answer · 2017-05-11 14:04:57Z

3

declaration:

declare module 'some-module' {
  var exportFunction : (arg: string) => void;
  export = exportFunction;
}

usage:

import * as someFunc from "some-module";
someFunc(a)';

Is how this can be done.

edited May 11, 2017 at 14:04

answered May 11, 2017 at 13:35

Martijn

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2 Comments

Alon Over a year ago

The opening parenthesis (in var exportFunction = (arg: string) => void;) is marked with red, saying: TS7011: Function expression, which lacks return-type annotation, implicitly has an 'any' return type.

Martijn Over a year ago

fixed. Should be declaration of type instead of an assignement, change = to :

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