Prevent the color extension from auto-loading

[pkra]

From #143 (comment).

You are right to point out the autoload-all extension, and I was going to say that because \color is already defined in MathJax's TeX input jax by default, that autoload-all would not redefine it, but I checked the code and I am wrong; \color is set to autoload the color extension. I'm not sure that is the desired behavior for MathJax-node, since that means it will operate differently from default MathJax in the browser.

[pkra]

Question: Do we want to drop the autoload extension entirely or do we want to load all extensions except the color extension?

[dpvc]

I think it is OK to use autoload-all, but perhaps we should put back the original definition for color once it loads. That would be easy enough to add.

[pkra]

I think it is OK to use autoload-all, but perhaps we should put back the original definition for color once it loads. That would be easy enough to add.

Do you mean just copy&paste https://github.com/mathjax/MathJax/blob/master/unpacked/jax/input/TeX/jax.js#L1320-L1326?

[pkra]

In other words: I don't think I know how to fix this ☹️

[dpvc]

You should add

      if (MathJax.AuthorConfig.extensions.indexOf("TeX/color.js") == -1) {
        MathJax.Hub.Register.StartupHook("TeX autoload-all Ready",function () {
          var macros = MathJax.InputJax.TeX.Definitions.macros;
          macros.color = "Color";
          delete macros.textcolor;
          delete macros.colorbox;
          delete macros.fcolorbox;
          delete macros.definecolor;
        });
      }

at line 425 of main.js to get back the original \color functionality. One can then use the --extensions "TeX/color" option to force the LaTeX-compatible color functions.