> But I'm not sure why parsing arbitrary identifiers is ok Because CSS isn't super-great at handling properties that are additive sets in the first place, let alone ones that'll expand over time. It would really suck if you designed your page to handle all the color schemes, including the new `sepia` one just added in color-adjust-2, but an older UA drops the property and you end up supporting none of them, because `sepia` isn't recognized. -- GitHub Notification of comment by tabatkins Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/3848#issuecomment-485263568 using your GitHub accountReceived on Sunday, 21 April 2019 16:12:04 UTC
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