this._sessionEntries.at is not a function

[ThatGregFromEROAD]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

This is started appearing in our Sentry after upgrading @sentry/react and @sentry/core to 9.29.0.
Not sure how to reproduce it as per thousands of customers, we have only couple of errors.

Expected Result

No this._sessionEntries.at is not a function error.

Actual Result

this._sessionEntries.at is not a function error

Product Area

Issues

Link

No response

DSN

https://3f83f886d3234f478f80a0c44064514c@o438049.ingest.sentry.io/5401292

Version

No response

[getsantry]

Auto-routing to @getsentry/product-owners-issues for triage ⏲️

[AbhiPrasad]

I think this might be related to #16492

@ThatGregFromEROAD what version did you upgrade from?

Are you able to share what browsers/os that this error was happening on?

[AbhiPrasad]

sentry-javascript/packages/browser-utils/src/metrics/web-vitals/lib/LayoutShiftManager.ts

Line 33 in b94f652

const lastSessionEntry = this._sessionEntries.at(-1);

Looks like .at is ES2022: https://blog.saeloun.com/2022/02/24/ecmascript2022-adds-add-method/

We need to fix this!

[ThatGregFromEROAD]

We've upgraded from 9.22.0 to 9.29.0.

Browsers, quite old I must say.

[AbhiPrasad]

yup that matches up! we'll get this fixed with the PR above :)