使用textcolor时，如何配置MathJax以识别方程式中的textrm {}？

Question

I'm trying to make an HTML page from LaTEX document that recently achieve it, I used the following mathjax, script configuration, after the head tag:

<script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>    
<script type="text/x-mathjax-config">
  MathJax.Hub.Config({
    extensions: ["tex2jax.js"],
    jax: ["input/TeX", "output/HTML-CSS"],

  tex2jax: {
    inlineMath: [ ['$','$'], ["\\(","\\)"] ],
    displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
    processEscapes: true
  },
    "HTML-CSS": { fonts: ["TeX"] }
  });
</script>
<script type="text/x-mathjax-config">
  MathJax.Hub.Config({
    "HTML-CSS": { 
      styles: {".MathJax": {color: "#FF0000 ! important"}} 
    }
  });                 

  MathJax.Hub.Queue(
    ["resetEquationNumbers",MathJax.InputJax.TeX],
    ["PreProcess",MathJax.Hub],
    ["Reprocess",MathJax.Hub]
 );
</script>

When I try to write the following equation:

\[
\det A=|A|=\left\{
\begin{array}{ll}
-\textrm{fixation d'une  \textcolor{red}{ligne:}} i=\color{red}{p} \Rightarrow |A|=(-1)^{\color{red}{p}+j}\Delta_{\color{red}{p}j}\\
-\textrm{fixation d'une colonne:  } j=\color{red}{p} \Rightarrow |A|=(-1)^{\color{red}{p}+i}\Delta_{i\color{red}{p}}
\end{array}
\right.
\]

The command textcolor{red} doesn't work. What can I do it with MathJax to configure it in order to get a colorful text in equation?

This is the result of my compilation:

Answer 1

As per the documentation , MathJax does does not focus on textmode and only allows the following within its text-mode macros ( \\text{} etc): $ for re-entering math mode, \\ref and \\eqref .

So there is no way to get anything like \\textcolor inside \\text to work.

However, you can wrap \\color around \\text to color the text and thus you could define a custom macro \\textwithcolor{red}{some text mode} , eg, by using $\\require{color}\\newcommand{\\textwithColor}[2]{\\color{#1}{\\text{#2}}} \\textwithColor{red}{halleo}$ .

You would still need to drop out of text mode to use it.

FWIW, there is an open issue for MathJax v3 to reconsider macros within text mode.