Hi, In bug 1548529, I intend to deprecate <mfrac>'s linethickness attribute values "thin", "thick" and "medium" from MathML3. The two first do not specify an exact thickness while the third one is the same as the default value. The MathML CG agreed to remove them from MathML Core and was not able to find any use of it [3]. However, these values are also implemented in WebKit. So for now, the plan is just to introduce a preference to disable them in Nighly build.
[1] https://www.w3.org/Math/draft-spec/chapter3.html#id.3.3.2.2 [2] https://github.com/mathml-refresh/mathml/issues/4 [3] https://github.com/mathml-refresh/mathml/issues/55 -- Frédéric Wang _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
