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This is so that the (possibly virtual) U+200B converted into a space can participate into white space collapsing. This is good, but phase 1 also invokes Segment Break Transformation Rules, and having these be affected by word-boundary-detection and word-boundary-expansion seem undesirable.
it would mean that
aaaa​
bbb
would be rendered as
aaa​bbb
but that if word-boundary-expansion were set to ideographic-space, it would then turn into
aaa  bbb
rather than the more desirable
aaa bbb
So, both of these opperations should be changed to happen
https://drafts.csswg.org/css-text-4/#word-boundary-detection and https://drafts.csswg.org/css-text-4/#word-boundary-expansion say that the virtual word boundary insertion and U+200B expansion happen "before CSS Text Module Level 3 §white-space-phase-1".
This is so that the (possibly virtual) U+200B converted into a space can participate into white space collapsing. This is good, but phase 1 also invokes Segment Break Transformation Rules, and having these be affected by
word-boundary-detection
andword-boundary-expansion
seem undesirable.it would mean that
would be rendered as
but that if
word-boundary-expansion
were set toideographic-space
, it would then turn intorather than the more desirable
So, both of these opperations should be changed to happen
cc: @fantasai
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