In https://github.com/w3c/csswg-drafts/issues/2484 it was resolved to accept one or two values in the overflow shorthand, instead of only one. If two values are specified, the first would be used for overflow-x and the second for overflow-y. This has been implemented by Firefox, and (hopefully) soon to be Chrome. A test case for this can be found at https://w3c-test.org/css/css-overflow/overflow-shorthand-001.html.
<rdar://problem/39615324>
Created attachment 380371 [details] Patch
Comment on attachment 380371 [details] Patch Thanks for the patch!
Comment on attachment 380371 [details] Patch There's a broken test.
(In reply to Simon Fraser (smfr) from comment #3) > Comment on attachment 380371 [details] > Patch > > Thanks for the patch! Thanks for the review. I've withdrawn commit-queue because "web-platform-tests/css/cssom/shorthand-values.html" is failing. I would like to wait until "fast/css/invalidation-errors.html" passes on ios-wk2 to adjust expectations if needed.
Created attachment 380426 [details] Patch Set reviewer and adjust tests expectations.
Comment on attachment 380426 [details] Patch Clearing flags on attachment: 380426 Committed r250849: <https://trac.webkit.org/changeset/250849>
All reviewed patches have been landed. Closing bug.