🐛 Bug: Browser doesn't include call stack for global uncaught errors

[JoshuaKGoldberg]

Bug Report Checklist

• [X] I have read and agree to Mocha's Code of Conduct and Contributing Guidelines
• [X] I have searched for related issues and issues with the faq label, but none matched my issue.
• [X] I have 'smoke tested' the code to be tested by running it outside the real test suite to get a better sense of whether the problem is in the code under test, my usage of Mocha, or Mocha itself.
• [X] I want to provide a PR to resolve this

Expected

When an uncaught error occurs during a test in browsers, you'd expect to see the call stack. That's useful.

Error: Oh no!
    at inner (test.example.js:8:15)

Actual

Mocha's browser error handling code was written before browsers gave nice stacks (https://github.com/mochajs/mocha/commit/eb58761bb3346d2597e8365e60273417127b72c4).

Error: Error: Oh no! (http://127.0.0.1:8081/test.example.js:8)

Minimal, Reproducible Example

Using a minimal browser setup such as in https://github.com/mochajs/mocha-examples/pull/72:

it("example", (done) => {
    function inner() {
        throw new Error("Oh no!");
    }

    setTimeout(inner);
});

Versions

Mocha: 10.3.0

Additional Info

This was filed long ago in #2167, then a fix proposed in #3952. Since #2167 is quite old, re-filing to be more current.

[ergunsh]

Hey hey, thanks for noticing & working on this! We're using Mocha in Chrome DevTools and this specific feature is much needed :)

I had taken a stab to fix this in here then I realized that your PR #5107 already looks good. Are you thinking of continuing that and making it cross the finish line?

[JoshuaKGoldberg]

Ah that's nifty to hear you're using Mocha in the Chrome DevTools! We're just waiting for review from another maintainer on #5107. I know everyone else has been swamped lately, so unclear when we'll be able to.

[JoshuaKGoldberg]

#5107 is merged; we'll release a new version with the fix soon. 🚀

[JoshuaKGoldberg]

#5107 was released in [email protected]. 🚀