These specifications define #CSS support for #i18n writing modes: left-to-right (e.g. Latin or Indic), right-to-left (e.g. Hebrew or Arabic), bidirectional (e.g. mixed Latin and Arabic) and vertical (e.g. Asian scripts) #Unicode #timetoimplement
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Level 4 is identical to Level 3 modulo 1) adding postponed features such as sideways-lr that helps write alphabetical text vertically, and 2) changing the #BoxModel interaction with #bidi. See all changes: w3.org/TR/2018/CR-css-writin…

May 28, 2018 · 2:38 PM UTC

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Check out the relevant @csswg test suite that contains 1114 tests! test.csswg.org/harness/test/…
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