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Gecko allows syntax like matrix(1, 0, 0, 1, 5em, 10%), with <translation-value> instead of <number> for the last two entries (it also accepts <number>). Likewise for matrix3d(), it allows <translation-value> instead of <number> for the fourth- and third-to-last entries, and <length> instead of <number> for the second-to-last. The spec doesn't allow this, but some Gecko developers want it to: (David Baron [:dbaron]) > We should change this in the same release that we unprefix. (Though I think > maybe we should try to convince other browsers to change.) (Matt Woodrow (:mattwoodrow)) > This was definitely an intentional choice to provide flexibility for > authors, consistency with the translate() functions, and consistency with > our existing matrix() implementation. > > I'd prefer to see this allowed in the spec than remove it from our code. https://bugzilla.mozilla.org/show_bug.cgi?id=719054#c1 Currently, the other three engines (IE, WebKit, Opera) don't allow this, but it seems like a possibly useful feature. Do we want Gecko to remove the feature, or everyone else to add it? Are other engines interested in adding it? Cf.: https://www.w3.org/Bugs/Public/show_bug.cgi?id=15431
Paris F2F meeting resolved to not change the spec in this regard.
Then it's WONTFIX, right?