TypeScript import error on node

I import this package like this:

import currency from 'currency.js';
currency(1).add(1.1);

This code work fine on webpack build, but fail on node TypeError: currency_js_1.default is not a function. I use currency.js in TypeScript project.

The npm package source exports is module.exports = currency, which should be export = currency; in d.ts file. So, I think maybe we should modify the currency.d.ts , or build result.

[scurker]

Thanks! I see the issue now. The typescript definition file seems to be correct, but typescript is attempting to import the commonjs module instead of the ES6 module. I want to investigate further to find the proper solution, but in the short term you should be able to use one of the following imports:

import * as currency from 'currency.js';

or

import currency = require('currency.js');

[scurker]

So here’s the root of the issue. Typescript is assuming modules export a default, which can cause issues when importing cjs modules.

As such, there seems to be only 3 possible solutions:

• import * as currency from 'currency.js'
• import currency = require('currency.js')
• add allowSyntheticDefaultImports: true to your tsconfig.json

I updated the typescript definition file to allow for the first 2 statements to be used, which I should hopefully be releasing in a patch update soon.