Re: [csswg-drafts] [css-background-4] add background-layers property to set everything but background-color (#8726)

It says `true` because `background-color` is part of the expansion, it's set to an internal [pending-substitution value](https://drafts.csswg.org/css-variables-1/#pending-substitution-value).

If in  #5319 we add `ignore`, we could maybe say that this pending-substitution value will be treated as `ignore` if the shorthand has the value that skips the longhand. But otherwise it's not straightforward.

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Received on Tuesday, 30 May 2023 16:40:19 UTC