Demonstration of the Transpilation Failure

Requirements

• Create a CommonJS project with Node22, so --experimental-require-module is supported.
• Import the default export of an ESM dependency
• Enable esModuleInterop (otherwise it will work)
• Transpilation will create an object like {"default": {"default": ...}}

To Reproduce

npm run js

The script will fail with TypeError: oidc_provider_1.default is not a constructor. Head over to the generated index.js and to the faulty line:

console.log('Created new Provider:', new oidc_provider_1.default('http://example.tld'));

Replace it with:

console.log('Created new Provider:', new oidc_provider_1.default.default('http://example.tld'));

Now, it's working and will log the Provider object.