[Bug]: Cannot read properties of null (reading 'tagName')

[alecmocatta]

Preflight Checklist

• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

What package is this bug report for?

rrweb

Version

2.0.0-alpha.12

Expected Behavior

No uncaught exceptions.

Actual Behavior

There is an uncaught exception triggering the window error event:

TypeError: Cannot read properties of null (reading 'tagName')

on this line:

rrweb/packages/rrweb/src/record/mutation.ts

Line 444 in 3d1877c

if ((n.parentNode as Element).tagName === 'TEXTAREA') {

Steps to Reproduce

In my app press cmd+backspace on any non-empty line in a contentEditable div. Unfortunately my app's not public yet.

Testcase Gist URL

No response

Additional Information

I use rrweb thru PostHog session replay and capture all backtraces from the window error event. Because whatever loads this script (I presume PostHog?) loads it without crossorigin set I initially just got a "Script error." error event. It was reproducing locally with the debugger open that I got the aforementioned error and tracked it down to the aforementioned line.

[metal-messiah]

To keep this issue alive, many of our customers have also reported seeing this error. We are using the same version noted above in our instrumentation library.

[metal-messiah]

⬆️ The way New Relic is currently planning on circumventing this until a bigger fix is implemented is to intercept the error using rrweb's errorHandler configuration, and flagging the error object in such a way as to not report it as a customer-based error.

[eoghanmurray]

Fixed in #1445 ?