scroll direction should respect language script direction

[tiansh]

value scroll and reverse should respect language script direction. As in most ltr languages it should scroll as described in current specification. But it should be reversed in rtl languages. CSS direction should be used in this context.

Discuss: What should the render do if comments use languages with different script directions?

[iamgqb]

scroll The default value indicates the scroll Bullet Chatting. The Bullet Chatting scrolls from left to right, and the scrolling time is controlled by the CSS property bulletchat-duration.

Maybe it shouldn’t be from left to right；

It should be from start to end；

[stuxt]

Thank you for your suggestion. The latter specification will add and optimize the ability to control the direction of the text and the vertical and horizontal layout. The international review in the W3C will focus on this part.

[hax]

弹幕主要流行于日本和中国，而日语和汉语都是有竖排的，不过似乎没有见到过采用竖排的弹幕？？

[iamgqb]

emmm... bilibili 在去年4月1号出过竖排的弹幕模式(古文弹幕)... 虽说是娱乐，但存在可能性

[hax]

@iamgqb 有没有在线的demo可以欣赏？

[hax]

If we really need to consider vertical writing mode, we may need to modify the values of top/bottom, change them to block-start/block-end, or simply start/end?

[iamgqb]

在线demo到没有了，不过可以在B站搜一下古文弹幕，还是存在一些录屏的。
倒是发现了一篇官方专栏 https://www.bilibili.com/read/cv338706

[MagicJuly]

@hax vertical-danmaku record: https://www.bilibili.com/video/av21487971
you can also use this mode in every video with code: player.verticalDanmaku(true);

[c933103]

I believe it should only follow the language direction of dominant content language instead of language of eaxh individual messages. Otherwise it would be strange to see a few Arabic (,etc.) message coming from the left without special meaning when the rest (in English, etc.) come out from right.