Surprised to find that Edge/FF return an empty string for GCS CSS shorthands. Webkit browsers return the computed value. cc: @zcorpan
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I believe that was required by some/all versions of DOM Level 2 Style
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but we haven't followed it for properties that were converted to shorthands
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guess I misremembered, then
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as promised, developer.microsoft.com/en-u… can you provide the FF one?
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bugzil.la/137688 which reminds me that getPropertyValue supposed to return null for shorthands
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er, getPropertyCSSValue, which we implement getPropertyValue on top of
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Replying to @davidbaron @gregwhitworth @AmeliasBrain @zcorpan
though we'd really like to stop exposing getPropertyCSSValue at some point

Aug 25, 2016 · 5:23 PM UTC

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Replying to @davidbaron @zcorpan
yeah, it seems as though it's mixed, but the few I've looked at you should be able to serialize them
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that said, in your bug you ask about compat - I haven't seen any only this one bug that has a testcase