🐛 npm package not working as constructor

[iArmanKarimi]

Description

When trying to use guardian-js in Node ESM, the import does not provide a usable constructor. Attempting to do new GuardianClient(apiKey, false) throws:

TypeError: GuardianClient is not a constructor

Steps to Reproduce

1. Install guardian-js via npm
2. Use ESM import in Node 22+:

import GuardianClient from "guardian-js";
const guardian = new GuardianClient(apiKey, false);

3. Run node index.js

Expected Behavior

guardian should be an instance of the Guardian client.

Actual Behavior

TypeError: GuardianClient is not a constructor

Notes / Analysis

• Logging the imported object shows: { default: [class Client] }
• The default export appears to be the class, but import or destructuring does not work correctly.
• Likely cause: the package does not properly support ESM or Node 22+.