Behavior is currently identical to Firefox, aside from the resizer which acts funky in `vertical-rl` mode (not `vertical-lr`), but that's also a problem with elements with `resize:both`, see: data:text/html,<div style="width: 200px; height: 200px; background: red; overflow: auto; resize: both; writing-mode: vertical-rl"></div> This needs tests.
<rdar://problem/102620075>
Tests are being added in: https://github.com/web-platform-tests/wpt/pull/37100/
Pull request: https://github.com/WebKit/WebKit/pull/6760
Committed 256977@main (99cf25ddd405): <https://commits.webkit.org/256977@main> Reviewed commits have been landed. Closing PR #6760 and removing active labels.
*** Bug 117228 has been marked as a duplicate of this bug. ***