Importing passport-saml fails on node v20.6.0

[LaurensRietveld]

Summary

We've just encountered the issue that importing (not running, but importing) passport-saml throws an error when:

• Node 20.6.0 is used
• you're importing passport-saml into an ESM module

Importing passport-saml will throw this error:

class MultiSamlStrategy extends strategy_1.AbstractStrategy {
                                           ^

TypeError: Class extends value undefined is not a constructor or null
    at Object.<anonymous> (~/saml/node_modules/@node-saml/passport-saml/lib/multiSamlStrategy.js:6:44)
    at Module._compile (node:internal/modules/cjs/loader:1241:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1295:10)
    at Module.load (node:internal/modules/cjs/loader:1091:32)
    at Module._load (node:internal/modules/cjs/loader:938:12)
    at Module.require (node:internal/modules/cjs/loader:1115:19)
    at require (node:internal/modules/helpers:130:18)
    at Object.<anonymous> (~/saml/node_modules/@node-saml/passport-saml/lib/index.js:21:29)
    at Module._compile (node:internal/modules/cjs/loader:1241:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1295:10)

Node.js v20.6.0

Using an older node version works fine, and importing passport-saml into a CJS module works fine as well.

To Reproduce

See here for an MWE: https://github.com/LaurensRietveld/saml-mwe and follow the readme:

• Make sure you're running node 20.6.0
• Run yarn
• Run node ./test.cjs. This works fine
• Run node ./test.js. This throw the error above

Probable cause

I expect this be caused by circular reference issue (given that this results in undefined imports). I noticed two circular references:

• MultiSamlStrategy.js depends on on index.js, which depends on MultiSamlStrategy.js
• MultiSamlStrategy.js depends on strategy.js, which depends on index.js which depends on MultiSamlStrategy.js

Environment

• Node.js version: 20.6.0
• passport-saml version: 4.0.4

[github-actions]

This issue is stale because it has been open for 90 days with no activity.

[LaurensRietveld]

this is still an issue (and PR still fixes this issue)

[github-actions]

This issue is stale because it has been open for 90 days with no activity.