config.js

window.MathJax = {
    options: {
      ignoreHtmlClass: 'tex2jax_ignore',
      processHtmlClass: 'tex2jax_process',
      renderActions: {
        find: [10, function (doc) {
          for (const node of document.querySelectorAll('script[type^="math/tex"]')) {
            const display = !!node.type.match(/; *mode=display/);
            const math = new doc.options.MathItem(node.textContent, doc.inputJax[0], display);
            const text = document.createTextNode('');
            const sibling = node.previousElementSibling;
            node.parentNode.replaceChild(text, node);
            math.start = {node: text, delim: '', n: 0};
            math.end = {node: text, delim: '', n: 0};
            doc.math.push(math);
            if (sibling && sibling.matches('.MathJax_Preview')) {
              sibling.parentNode.removeChild(sibling);
            }
          }
        }, '']
      }
    }
  };