[csswg-drafts] [cssom-view] Doubts regarding the overflow directions description

anawhj has just created a new issue for https://github.com/w3c/csswg-drafts:

== [cssom-view] Doubts regarding the overflow directions description ==
This issue would be a very simple problem about [the definition of overflow directions](https://drafts.csswg.org/cssom-view/#overflow-directions).

According to the combination of a block flow direction and an inline base direction, the overflow direction can be determined. For example, if the block flow direction is top-to-bottom and the inline base direction is left-to-right, the overflow direction is rightward and downward. On the basis of [`CSS Writing Mode`](https://drafts.csswg.org/css-writing-modes-4/#text-flow), [`CSSOM View`](https://drafts.csswg.org/cssom-view) describes the combination and the overflow direction accordingly, but I think some cases would be wrong.

In the [`2. terminology`](https://drafts.csswg.org/cssom-view/#terminology) chapter in `CSSOM View`, it specifies that if the block flow direction is left-to-right and the inline base direction is left-to-right, the overflow directions is `rightward and downward`. But as far as my understanding, the overflow directions should be modified to `rightward and upward` in that case. Besides, there would be some errors like this case near the section.

cc - @zcorpan, @frivoal

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1569 using your GitHub account