Calling dotenv.config() results in a TypeError

[bankslenus]

Since upgrading from dotenv 14.2.0 to 14.3.0 I get the following error when calling dotenv.config()

CODE (foo.js):

...
import * as dotenv from "dotenv";
dotenv.config(); // line 20
...

ERROR:

$ yarn build
$ tslint -c tslint.json -p tsconfig.json --fix
$ tsc
$ node --es-module-specifier-resolution=node .
file:///..../foo.js:20
dotenv.config();
       ^

TypeError: dotenv.config is not a function
    at file:///..../foo.js:20:8
    at ModuleJob.run (node:internal/modules/esm/module_job:185:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:281:24)
    at async loadESM (node:internal/process/esm_loader:88:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)

Downgrading to 14.2.0 solves the error.

[JeromeFitz]

Downgrading to 14.2.0 is an option. Thanks for identifying and suggesting @bankslenus

14.3.0 exports as default currently: main.js.

[Module: null prototype] {
  default: { config: [Function: config], parse: [Function: parse] }
}

For now you can do:

import dotenv from "dotenv";

Aside:

In one of my cases I was dynamically importing (only loading on local development not CI) and needed to change to this:

...
  const dotenv = await import('dotenv')
  dotenv.default.config({ path: './.env' })
...

Though this would work too:

...
  const {
    default: { config },
  } = await import('dotenv')
  config({ path: './.env' })
...

---

The code change looks to come in from this commit:

Before:

module.exports.config = config
module.exports.parse = parse

After:

const DotenvModule = {
   config,
   parse
 }

 module.exports = DotenvModule

Will see if we can double-up the module.exports as a patch for the interim to see if going to 14.3.1 is an option for backward compatibility, or if a different direction is preferred.

[motdotla]

This is patched in 14.3.1. So sorry about this one. Thanks to @JeromeFitz for the quick patch.

https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md#1431-2022-01-25