t.at is not a function. (In 't.at(-1)', 't.at' is undefined)

[aleksandr-shevchenko-0]

Hello!
We are using posthog-js 1.164.3.
Started catching the error:

TypeError: t.at is not a function. (In 't.at(-1)', 't.at' is undefined)
  at ? (webpack://@fundraiseup/dashboard/../../node_modules/posthog-js/dist/module.js:1:36824)
  at stringify([native code])
  at wn(webpack://@fundraiseup/dashboard/../../node_modules/posthog-js/dist/module.js:1:36764)
  at onRRwebEmit(webpack://@fundraiseup/dashboard/../../node_modules/posthog-js/dist/module.js:1:62930)
  at headMetaVerification(webpack://@fundraiseup/dashboard/../../node_modules/posthog-js/dist/module.js:1:60800)
  at node(../node_modules/.pnpm/[email protected]_patch_hash=x52pllmg6k5suqkcoa7bdybazq/node_modules/rrweb/dist/rrweb.js:1:1)
  at apply(../node_modules/.pnpm/[email protected]_patch_hash=x52pllmg6k5suqkcoa7bdybazq/node_modules/rrweb/dist/rrweb.js:1:1)
  at i(webpack://@fundraiseup/dashboard/../../node_modules/@sentry/browser/esm/helpers.js:90:17)

Is it a bug? Which browser versions are supported by posthog-js?

[pauldambra]

hey, what version of posthog-js is that using?

you can see our browser support in the package.json

https://github.com/PostHog/posthog-js/blob/main/package.json#L125-L127

[pauldambra]

Do you still get the error if you update to latest?

[aleksandr-shevchenko-0]

Hey, @pauldambra!
Thanks for your answer!

We've updated to the latest version, but since we can't reproduce the bug ourselves, we'll follow the results in Sentry.

I will report on the result