[siunitx] \percent not working

[SamThilmany]

I just noticed that the \percent command doesn't work properly in this MathJax extension, while it perfectly works in the "true" LaTeX package.

Here is my command and it's error:

\SI{95}{/percent}

Error: undefined is not an object (evaluating 'n.apply')
file: https://cdn.mathjax.org/mathjax/2.7-latest/jax/input/TeX/jax.js?V=2.7.0
line: 19
Debugging tips: use 'unpacked/MathJax.js', inspect 'MathJax.Hub.lastError' in the browser console

I hope it helps in resolving the bug. For any more details, you can contact me.

[pkra]

cc @burnpanck (who wrote the extension)

[SamThilmany]

@burnpanck There is also a problem with \degreeCelsius. The command works, but the output is weird. It's very small and it does not use the correct font.

Take a look at the screenshot. The first line is \SI{25}{\degreeCelsius}, the second line is simple text inside the MathJax environment \text{25 °C}.

[burnpanck]

Hm. The \percent definitely is a bug. Maybe I get around to look at it this weekend. For the degree Celsius, one would have to compare the generated Jax. However, I am not an expert on that side, in fact I'm not sure if any of the units is really rendered correctly.

[pkra]

For the degree Celsius, one would have to compare the generated Jax.

You currently generate

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mn>25</mn>
  <mspace width="mediummathspace" />
  <mi mathvariant="normal">&#x2103;<!-- ℃ --></mi>
</math>

Which seems the right way.

However, the issue described above stems from the fact that not all fonts supported by MathJax have a glyph for ℃ (in particular the default fonts don't) and the system fallback font in the above screenshot is doing rather poorly. (It might actually be considered though a bug @SamThilmany if you can provide more info).

Alternatives could be $\mathrm{°C}$ and (as MathML) <math><mmultiscripts><mi mathvariant='normal'>C</mi><mprescripts><none></none><mi>&#176;</mi></mprescripts></mmultiscripts></math>.

[pkra]

Closining favor of burnpanck/MathJax-siunitx#3