Ts-node: TypeError: pubnub_1.default is not a constructor

Created on 20 Jan 2018 · 7Comments · Source: TypeStrong/ts-node

I'm not sure this issue is related to pubnub or ts-node, but when I use pubnub with ts-node together, it will throw out the following error:

TypeError: pubnub_1.default is not a constructor

My code is:

import Pubnub from "pubnub"
const pubnub = new Pubnub({
  subscribeKey: "sub-c-52a9ab50-291b-11e5-baaa-0619f8945a4f"
})

And my tsconfig.json is:

{
  "compilerOptions": {
    "strict": true,
    "lib": ["es6"],
    "typeRoots": [
      "./node_modules/@types/",
      "./src/@types/"
    ]
  }
}

I've already installed types for pubnub,

npm install pubnub --save
npm install @types/pubnub --save-dev

I guess I need to change some configurations in tsconfig.json, any ideas?

Source

soulmachine

Most helpful comment

The correct import is import pubnub = require('pubnub').

NaridaL on 24 Jan 2018

👍3 ❤1 🎉1

All 7 comments

The correct import is import pubnub = require('pubnub').

NaridaL on 24 Jan 2018

👍3 ❤1 🎉1

@NaridaL By doing so you're importing it as a normal JavaScript library and you lose type checking

soulmachine on 24 Jan 2018

https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require

NaridaL on 24 Jan 2018

@NaridaL Thanks!

When importing a module using export =, TypeScript-specific import module = require("module") must be used to import the module.

But in this file types/pubnub/index.d.ts, pubnub is exported by export default Pubnub; instead of export = Pubnub;

soulmachine on 24 Jan 2018

Check this pull request DefinitelyTyped/DefinitelyTyped#23085, the export statement is now updated to export = Pubnub

mt40 on 26 Jan 2018

@kantlove Thanks, it does solve the problem!

soulmachine on 26 Jan 2018

Hi,

I can't get this working in my Jest tests. Seems to work fine in my app, but when testing I get TypeError: pubnub_1.default is not a constructor.

I am unable to import via import pubnub = require('pubnub') because then I get:
'import =' is not supported by @babel/plugin-transform-typescript Please consider using 'import <moduleName> from '<moduleName>';' alongside Typescript's --allowSyntheticDefaultImports option.

And of course I cannot do as it suggests, because PubNub doesn't like it.

What is the recommended solution?

Thanks