What steps should be taken to resolve the error message "This Expression is not constructable"?

I'm trying to import a JavaScript class into TypeScript, but I keep getting the error message

This expression is not constructable.
. The TypeScript compiler also indicates that A does not have a constructor signature. Can anyone help me figure out how to solve this issue?

index.ts

import A from "aaa";
const a = new A(); //error: this expression is not constructable.  
  
/*
and result of console.log(A); is [Function: A].

result of console.log(A.toString()); is below
class A {
  constructor(name) { this.name = name; }
}
*/

index.js in the aaa module.

class A {
  constructor(name) { this.name = name; }
}
module.exports = A;

index.d.ts in the aaa module.

export declare class A {
  constructor(name:string);

  name:string;
} 

Currently, I'm able to construct A in JavaScript using the following code snippet, however, it doesn't work in TypeScript.

const A = require("aaa");
const a = new A();

Answer №1

Check out the comment below for more information. (original)

// Remember, ES6 modules do not support exporting class objects directly.
// To use this file, import it CommonJS-style:
//   import x = require('[~THE MODULE~]');
//
// Or, with --allowSyntheticDefaultImports or --esModuleInterop enabled,
// you can also import it as a default import:
//   import x from '[~THE MODULE~]';
//
// Refer to TypeScript documentation at
// https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require
// for common workarounds for this ES6 module limitation.

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