webWorkerIntegration doesn't handle unhandledrejection events

[imasalygin]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/browser

SDK Version

10.22.0

Framework Version

No response

Link to Sentry event

No response

Reproduction Example/SDK Setup

Setup according to https://docs.sentry.io/platforms/javascript/best-practices/web-workers/#recommended-setup

main.ts

import * as Sentry from "@sentry/browser";
import MyWorker from "./worker.ts?worker";

const worker = new MyWorker();

Sentry.init({
    dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",
    debug: true,
    integrations: [
        Sentry.webWorkerIntegration({ worker })
    ],
    beforeSend() {
        console.log('beforeSend', ...arguments);
        return null;
    }
});

worker.ts

import * as Sentry from "@sentry/browser";

Sentry.registerWebWorker({ self });

self.postMessage("Worker ready!");

setTimeout(() => {
    throw new Error('worker error');
}, 1000);

(async function() {
    await new Promise(resolve => setTimeout(resolve, 1000));
    throw new Error('worker async error');
})();

Steps to Reproduce

1. Create an empty project (vite in my case)
2. Configure it using my snippets
3. Open in Chrome browser (Version 141.0.7390.108 (Official Build) (arm64), MacOS)
4. See console

Expected Result

beforeSend was called twice, with 'worker error' and 'worker async error'

Actual Result

beforeSend was called once, with 'worker error'

Additional Context

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[linear]

JS-1097

[RulaKhaled]

Hello, thank you for reaching out. I have confirmed that this is a bug with how the webWorkerIntegration handles promise rejections in web workers, i'm working on a fix.