import as ES module give me an undefined object

[mbsanchez01]

When I import this module using the next code

import ISO6391 from 'iso-639-1';
console.log(ISO6391.getAllCodes());

I've got the error "Cannot read properties of undefined (reading 'getAllCodes')" however, if I import it using require all works fine, but, it is not normal to have code like this, it is not harmonics.

import { Injectable } from '@nestjs/common';
import { CreateLanguageDto } from './dto/create-language.dto';
import { UpdateLanguageDto } from './dto/update-language.dto';
const ISO6391 = require('iso-639-1'); //import is not working

Could you fix this please ?

[meikidd]

@mbsanchez01
Thank you for your feedback, I released a new version v3.0.0 for this. Please help to check.

[mbsanchez01]

I don't know why it is happening to me, I'm in a NestJs project, and to make it work I need to work around it:

import * as ISO6391 from 'iso-639-1';

console.log((ISO6391 as any).getAllCodes());

I'm using version 3.0.1

[meikidd]

@mbsanchez01
Could you provide a minimal reproducible repo? So that I can try replicate it on my side.

[mbsanchez01]

Please check this repository out: https://github.com/mbsanchez01/iso639bug

[meikidd]

@mbsanchez01 You can try adding "esModuleInterop": true to your tsconfig.json file, it should fix the issue.

https://www.typescriptlang.org/tsconfig#esModuleInterop