[css-text-4] change "Creates 1/4em extra spacing between" to "Creates extra spacing between" #7050
Description
https://drafts.csswg.org/css-text-4/#text-spacing-property
This proposal was found in the following issue:
- In the above description of
ideographic-alphaandideographic-numeric, change "Creates 1/4em extra spacing between" to "Creates extra spacing between."
and this issue was resolved as:
RESOLVED: Add a new text-spacing:auto value, which is not the initial value.
I am ok with adding the auto value, but I think it's not sufficient. Changing "Creates 1/4em extra spacing between" to "Creates extra spacing between" is still necessary.
The "1/4em extra spacing" is not the best choice in many cases, and narrower space such as 1/6em is preferred. Apple iOS seems to use 1/6em for ideographic-alpha/numeric spacing.
For the auto value, UA can choose such better spacing value for ideographic-alpha/numeric spacing, but stylesheet authors cannot use the auto value when they need to choose specific text-spacing style, e.g., preference between allow-end and trim-end, or space-first and trim-start. So the spacing value of ideographic-alpha and ideographic-numeric should be same as the spacing value for ideographic-alpha/numeric spacing with auto.
FYI, Vivliostyle supports the text-spacing property, with auto value which is equivalent to trim-start trim-end trim-adjacent ideograph-alpha ideograph-numeric and the ideograph-alpha and ideograph-numeric create 1/6em space. See https://docs.vivliostyle.org/#/supported-css-features#css-text-4