Hi there, recently we also find that there isn't a function can make the text both bold and italic in KaTeX. All the functions that make text bold will also make text no longer italic. The target effect is as bellow.
Do you have any plan to support italic bold text or any suggestion? Thank you!
dyzpku
All 16 comments
We don't support it yet, but you would use \boldmath. We use fonts based on the MathJax fonts which has a Math-BoldItalic font which we could use.
kevinbarabash
on 13 Dec 2016
It should be noted that \boldmath also makes the operators bold.
kevinbarabash
on 13 Dec 2016
Thanks for reply! The \boldmath function is also not yet supported in release v0.6.0 right? Does it mean that you will support \boldmath in later version? Thank you!
dyzpku
on 14 Dec 2016
I'm sure we will at some point.
kevinbarabash
on 14 Dec 2016
Would love to help contribute. Been looking around the code for a bit and was wondering where I could start for this problem. Thanks!
sunsheeppoplar
on 22 Dec 2016
@sunsheeppoplar: Thanks for that offer! 鉂わ笍
I'd start by looking at \mathrm and \mathbf, see how they are implemented. Feel free to ask if you get stuck following the flow of these commands through the engine.
gagern
on 22 Dec 2016
As far as I know, \boldmath is a declaration, so it will make the whole formula bold until you \unboldmath. You must also include the math mode expressions within the scope of the declaration, which makes it quite impractical.
In my field we would normally use \boldsymbol from the amsmath package, although it seems that this has now been superseded by \bm.
jeanm
on 4 Jan 2017
@jeanm I just tested, and you're correct: Command \boldmath invalid in math mode. (Though maybe not terrible to add support for it within math mode...) AMSMath's \boldsymbol and/or \bm seem like reasonable goals too.
edemaine
on 4 Jan 2017
It looks like \bm can accept an atom or a group. I'm going to switch this issue to support \bm because it'll be less work and will still produce the desired output.
kevinbarabash
on 5 Jan 2017
Apparently there is also fixmath's \mathbold. Here's a visual comparison. \bm is probably the right decision, given that AMS recommends it.
edemaine
on 5 Jan 2017
Sorry, y'all, got a bit caught up with transitioning at work. Is this still something y'all are looking at or has a PR been proposed elsewhere that encompasses this?
sunsheeppoplar
on 4 Apr 2017
This is still very much needed.
tscholak
on 4 Apr 2017
I'm using Katex on my math-lessons website. Questions and answers are bolded and, naturally, these questions and answers commonly contain variables. It would be _really_ nice to be able to format bolded AND italicized letters. Is anybody working on this issue currently? Thank you!
stapeleliz
on 14 Sep 2017
@stapeleliz no one is currently working on this to my knowledge. I'd like to do #816 first. Since it's blocking this and a couple of other issues I'll take on that issue.
kevinbarabash
on 14 Sep 2017
Okay; thank you!
stapeleliz
on 14 Sep 2017
Just wanted to comment that this feature is very badly wanted.
A note that both \boldsymbol and \mathbf are important - the former produces bold italic symbols, including bold greek letters, that often refer to vectors, whereas the latter produces bold non-italic symbols that often refer to matrices.
aterenin
on 14 Nov 2017
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This is still very much needed.