\set{ causes an error

Open superle3 opened this issue 4 months ago • 1 comments

Issue Summary

I have tried it on Obsidian, overleaf and a blank document and \set{ throws an exception instead of returning html with error code. (For other error latex { for example it gives back html so I presume this is a bug?)

Steps to Reproduce:

For the html document

<!doctype html>
<html>
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <title>Page Title</title>
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script
            src="https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js"
            defer
        ></script>
    </head>
    <body></body>
</html>

(what vscode gave me as template) 2. in the console, execute the command await window.MathJax.tex2chtmlPromise("\\set{") 3. get the error

Uncaught (in promise) TypeError: can't access property "isInferred", t is null
    appendChild https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    setChildren https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    setChildren https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    setChildren https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    createNode https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    create https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    compile https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    compile https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    methodActions https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    renderConvert https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convert https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convert https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convertPromise https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    Rn https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    Rn https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convertPromise https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    e https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    r https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    promise callback*r https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    e https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    promise callback*e https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    In https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convertPromise https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    _readyPromise https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    promise callback*whenReady https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    convertPromise https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    <anonymous> https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js:1
    <anonymous> debugger eval code:2
    <anonymous> debugger eval code:3
[tex-mml-chtml.js:1:174878](https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js)

As you see in the picture await window.MathJax.tex2chtmlPromise("{") does give html even though there is a syntax error. I am not a developer using mathjax, but a user of Obsidian 1.9.12 and overleaf, so excuses if this covered in the documentation but I couldn't find anything

Technical details:

MathJax Version: 4.0/3.2
Client OS: fedora 41 kde 6.4/ windows 10 22H2
electron: 37.3.1 (console.log(process.versions.electron; gave that as output in obsidian)
Firefox/librewolf 143.0-1

I am using the following MathJax configuration:

MathJax = {
...
};

and loading MathJax via

<script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>

See example above and I don't know the environment of obsidian and overleaf

Supporting information:

see above and I don't know the configuration of overleaf and obsidian.

Oct 12 '25 19:10 superle3

Thanks for the error report. The handling of misbalanced braces for \set and some other macros in the braket package is not correct. Have made a PR to correct the situation, which will be in the next release.

In the meantime, you can incorporate

MathJax = {
  loader: {
    '[tex]/braket': {
      ready() {
        const BraketMethods = MathJax._.input.tex.braket.BraketMethods.default;
        const braket = function (parser, name, open, close, stretchy, barmax, space = false) {
          const i = parser.i;
          parser.GetArgument(name);
          parser.i = i;
          return BraketMethods.Braket(parser, name, open, close, stretchy, barmax, space);
        };
        const {MapHandler} = MathJax._.input.tex.MapHandler;
        const map = MapHandler.getMap('Braket-macros');
        ['set', 'braket', 'Set', 'Braket'].forEach((name) => map.lookup(name)._func = braket);
      },
    },
  },
};

into your MathJax configuration (or add it if you don't have one).

Oct 13 '25 19:10 dpvc