Lengths for `font-optical-sizing` are guaranteed to confuse authors and they will think they have to use pt or px values when what they actually want is `auto` or a unitless ratio. See what happened with `line-height`. Most websites use lengths even though they should use unitless values. The same will happen with `font-optical-sizing` if it supports lengths. Of course, with `line-height` lengths had to be supported because there was no other way to get a specific line height independent of font size for the cases where you really did want that. But for optical sizes you can use `font-feature-settings`. -- GitHub Notification of comment by shimmark Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/4430#issuecomment-693630479 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Wednesday, 16 September 2020 19:53:16 UTC
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