-webkit-writing-mode: vertical-lr; does not work on input button element.
Created attachment 203759 [details]
Created attachment 203760 [details]
Submitted test on various input and button elements and vertical-lr writing mode:
a) the test uses a "SHOULD": so passing that test is recommended but not required to be able to claim conformance with the spec.
b) the tests in all CSS test suites never use vendor prefixes
This issue have a relation to https://bugs.webkit.org/show_bug.cgi?id=70211
Created attachment 315963 [details]
Form controls don't go vertical