Re: Interop 2024

Hi Neil, all,

Is the interop effort a good place for Math WG members to independently
start filing new issues? I am a little hesitant, myself.

Wouldn't it make more sense to first see if we have buy-in from the
respective browser vendors (and meet any conditions to gain that)?
Once we hear back a "soft yes" from the right vendors, we could file an
interop issue to make things official.
Experience seems to show that "cold outreach" requests don't move the
needle too much in MathML browser land.

I can certainly imagine making CSS support for MathML Core a public
"implementation priority" for the Math WG, where we do enough liaison work
to have backing for a small number of features to gain parity.
At which point there may be a then-successful interop issue for 2025 (or

Just thinking out loud,

On Mon, Sep 18, 2023 at 1:23 AM Neil Soiffer <> wrote:

> To give a little context to Brian's message, the interop effort is an
> effort to make browsers behave the same/have the same features so
> developers can count on a feature working in all main browsers when they
> use the feature.
> MathML core has some significant features missing from Webkit/Safari and
> Gecko/Firefox. This means that you can't really use a number of features in
> MathML core. For example, you can't use CSS with MathML in Safari or
> Firefox. This is a major frustration for me as a MathML full polyfill
> author because I can't do some of the polyfills without having to target
> each browser separately. I know I've seen others complain about this and
> other issues.
> This is your chance to make the case for why some of the top implementers
> in the browser world should concentrate on some feature. As Brian has said
> more than once, there are A LOT of things outside of math that need
> attention. We need to make a little noise if we are ever going to get some
> math features to rise to the level of even being considered. If you have
> bumped your head into some cross-platform issue with MathML Core, say
> something by filing a Focus Area Proposal issue. The odds of it getting
> addressed are not high, but the odds are zero if you don't file an issue.
>     Neil
> On Fri, Sep 15, 2023 at 11:11 PM Brian Kardell <> wrote:
>> Is now open:
>> The core group had requested i let them know when it was.

Received on Monday, 18 September 2023 14:52:04 UTC