Prevent LaTeX rendering on Discourse forums
// ==UserScript==
// @name Disable LaTeX on Discourse
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Prevent LaTeX rendering on Discourse forums
// @match *://*/*
// @grant none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// Helper to override MathJax and KaTeX render functions
function blockRenderers() {
if (window.MathJax) {
console.log("[Tampermonkey] Blocking MathJax...");
window.MathJax = {
typeset: function() {},
typesetPromise: function() { return Promise.resolve(); },
startup: { promise: Promise.resolve() },
config: {}
};
}
if (window.katex) {
console.log("[Tampermonkey] Blocking KaTeX...");
window.katex = {
render: function() {},
renderToString: function() { return ''; }
};
}
}
// Observe new script tags that try to load MathJax or KaTeX
const observer = new MutationObserver((mutations) => {
for (let mutation of mutations) {
for (let node of mutation.addedNodes) {
if (node.tagName === 'SCRIPT' && node.src &&
(node.src.includes('MathJax') || node.src.includes('katex'))) {
console.log("[Tampermonkey] Blocking script:", node.src);
node.type = 'javascript/blocked';
node.parentNode.removeChild(node);
}
}
}
});
observer.observe(document.documentElement, {
childList: true,
subtree: true
});
// Run blocker early and often
blockRenderers();
setInterval(blockRenderers, 1000); // Re-block in case the page tries to reload them
})();