Contact emailstk...@chromium.org

ExplainerNone

Specification
https://drafts.csswg.org/css-writing-modes/#propdef-writing-mode

Summary

Support of `sideways-rl` and `sideways-lr` keywords for `writing-mode` CSS
property is added. They are vertical writing modes, and all letters are
sideways.


Blink componentBlink>Layout>WritingMode
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ELayout%3EWritingMode>

Motivation

`sideways-rl` and `sideways-lr` are helpful to write non-CJK text
vertically. They don't have behaviors favorable for CJK languages unlike
`vertical-rl` and `vertical-lr`.


Initial public proposalNone

Search tagswriting-mode
<https://chromestatus.com/features#tags:writing-mode>, sideways
<https://chromestatus.com/features#tags:sideways>

TAG reviewNone

TAG review statusNot applicable

Risks


Interoperability and Compatibility

Risks are very low.  Other two engines already support this feature.


*Gecko*: Shipped/Shipping

*WebKit*: Shipped/Shipping

*Web developers*: Strongly positive (
https://issues.chromium.org/issues/40501131) The issue has 21 votes.

*Other signals*:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that
it has potentially high risk for Android WebView-based applications?

None


Debuggability

None


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes

https://wpt.fyi/results/css/css-writing-modes


Flag name on chrome://flagsNone

Finch feature nameNone

Non-finch justificationNone

Requires code in //chrome?False

Tracking bughttps://issues.chromium.org/issues/40501131

Estimated milestones

No milestones specified


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6201053052928000

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

-- 
TAMURA Kent
Software Engineer, Google

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