Having difficulties creating a new instance of a class

I'm encountering an issue with this TypeScript code

import Conf = require('conf');
const config = new Conf();

The Problem: the expression is not constructable and the imported module lacks construct signatures

It's puzzling because the module has a default export of a class named 'Conf' with a 'constructor' method.

Tried Solution: I attempted the following with explanation to follow

const config = Conf;
config.constructor();

I theorized that maybe the problem stemmed from 'Conf' exporting the class itself, requiring me to assign it to a variable and then call its methods directly as shown above, but this approach strikes me as odd.

Why doesn't the usual 'new' syntax function here?

References Pkg for your perusal: https://www.npmjs.com/package/conf

Update 1:

The conf package presents the example in this manner:

const Conf = require('conf');

const config = new Conf();

Please bear in mind that in typescript, the standard import syntax for commonJS should be utilized, which explains my usage of it:

import Conf = require('conf');

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

Personally, I don't think the import syntax is causing the problem here.

Update 2

Turns out it was indeed an import syntax issue haha. Kudos to Alex for pointing that out.

Answer №1

Desiring the following:

import Conf from 'conf'
const config = new Conf()

The syntax of import foo = require('foo') holds a unique significance. According to the referenced documentation:

They also support replacing the exports object with a custom single object. Default exports are meant to act as a replacement for this behavior; however, the two are incompatible. TypeScript supports export = to model the traditional CommonJS and AMD workflow.

Regarding when it is appropriate to use import foo = require('foo'), the guidance states:

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

Examining the code responsible for exporting the desired class, we observe the following:

export default Conf;

This constitutes a standard, typical typescript default export. The usual approach to importing such in typescript is:

import Conf from 'conf'

View it operational here

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