Which Stack Exchange sites use MathJax?

Question

As the title says, I could use an exhaustive list of all Stack Exchange sites that use MathJax. If the list included any site-specific customizations made to the MathJax configuration on each site, that would be even better.

Answer 1

Which sites support MathJax?

These sites (and their respective Meta sites) support MathJax:

1. 3D Printing (with mhchem extension)
2. Amateur Radio
3. Artificial Intelligence
4. Astronomy
5. Aviation
6. Bioacoustics
7. Bioinformatics
8. Biology (with mhchem extension)
9. Blender
10. Chemistry (with mhchem extension)
11. Code Golf (with \$ delimiters)
12. Code Review (with \$ delimiters)
13. Computational Science
14. Computer Graphics
15. Computer Science
16. Computer Science Educators
17. Cross Validated
18. Cryptography
19. Data Science
20. Drones and Model Aircraft
21. Earth Science (with mhchem extension)
22. Economics
23. Electrical Engineering (with \$ delimiters)
24. Engineering
25. Game Development (with \$ delimiters)
26. History of Science and Mathematics
27. MathOverflow
28. Mathematica
29. Mathematics
30. Mathematics Educators
31. Matter Modeling (with mhchem extension)
32. Operations Research
33. Photography (with \$ delimiters)
34. Physics
35. Programming Language Design and Implementation
36. Proof Assistants
37. Psychology & Neuroscience
38. Puzzling
39. Quantitative Finance
40. Quantum Computing (with mhchem extension)
41. Robotics
42. Role-playing Games (with \$ delimiters)
43. Signal Processing
44. Space Exploration
45. Theoretical Computer Science
46. Worldbuilding (with mhchem extension)

This list was complete as of 2023-08-13. If you notice that it has become outdated, please update it using the snippet below.

Run the Stack Snippet to get the live list based on /sites from the Stack Exchange API. Note that the snippet does not check sites for the mhchem extension or \$ delimiters, only for the mere presence of MathJax; these parenthetical notes are hard-coded into the output. If any of these are out of date, please update the specials list or leave a comment on this post to let the author know to change it:

// edit below structure to indicate mathjax specific settings
// remove all spacees and/or - from the name of the site
// all lowercase
var specials = {
  "3dprinting": { mhchem: true },
  biology: { mhchem: true },
  chemistry: { mhchem: true },
  earthscience: { mhchem: true },
  mattermodeling: { mhchem: true },
  quantumcomputing: { mhchem: true },
  worldbuilding: { mhchem: true },
  electricalengineering: { delim: true },
  codegolf: { delim: true },
  codereview: { delim: true },
  gamedevelopment: { delim: true },
  photography: { delim: true },
  roleplayinggames: { delim: true },
 };

// no changes needed after this
function onload() {
  
  // error handling
  if (xhr.status !== 200) {
    document.getElementById('result').textContent = 'An error occurred: ' + xhr.status;
    return;
  }

  function filter(items) {
   var i, 
       sites =[];
   for(i=0; i < items.length; i++) {
     if (items[i].site_type === 'main_site' &&
         items[i].markdown_extensions &&
         items[i].markdown_extensions.indexOf('MathJax')>-1)
       {
          sites.push(items[i]);
       }
     }
    return sites; 
  }

  function getExtensions(sitename) {
    var sec = specials[sitename.toLowerCase().replace(' ','').replace('-','')],
        extra = '';
    if (sec !== undefined) {
      extra = '(with ';
      if (sec.mhchem) extra = extra + 'mhchem extension';
      if (sec.delim) extra = extra + '`\\$` delimiters';
      extra = extra + ')'
     }
     return extra;
  }

  function buildMarkdown(site, extra) {
    var content = [
      '1. [',
      site.name,
      '](',
      site.site_url.substr(site.site_url.indexOf(':') + 1),
      ') ',
      extra
    ], 
    pre = document.createElement('pre');
    pre.innerHTML = content.join('');
    return pre;
  }

  function processSites(sites) {
    var i,
      result = document.getElementById('result'),
      md = document.getElementById('md'),
      li, 
      extra;

    for(i = 0; i < sites.length; i = i + 1) {
        extra = getExtensions(sites[i].name);
        li = document.createElement('li');
        li.textContent = sites[i].name + ' ' + extra;
        result.appendChild(li);
        md.appendChild(
           buildMarkdown(sites[i], extra)
        );
    }
  }

  function sortSiteName(l, r) {
    return l.name<r.name?-1:1;
  }

  function process(txt) {
    var data =  JSON.parse(txt);
    processSites(filter(data.items).sort(sortSiteName));
  }
  
  process(xhr.responseText);

}

var xhr = new XMLHttpRequest();
xhr.open(
  'GET',
  'https://api.stackexchange.com/2.2/sites?pagesize=500&filter=!*L6SiaRiUSk*Z2zr');
xhr.addEventListener("load", onload);
xhr.send();

<ol id="result">
</ol>

<div id="md">
</div>

It's possible to examine the configuration programmatically, as suggested by @IlmariKaronen; here is a user script which does. (It doesn't work as a snippet because of CORS protection.)

Why doesn't [site X] support MathJax?

MathJax increases page load times drastically, so it's only supported on sites that have demonstrated a serious need for it. For more information, see LaTeX on Stack Overflow?

It is intentionally deactivated on TeX - LaTeX, as generally, site users want to see the code more than they want to see the rendered output.