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Auto LaTeX Renderer

Converts LaTeX on web pages into formatted math using MathJax

当前为 2024-11-06 提交的版本，查看 最新版本。

// ==UserScript==
// @name         Auto LaTeX Renderer
// @namespace    http://tampermonkey.net/
// @version      1.5
// @description  Converts LaTeX on web pages into formatted math using MathJax
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Set MathJax configuration to enable single dollar signs
    window.MathJax = {
        tex: {
            inlineMath: [['$', '$'], ['\\(', '\\)']],
            displayMath: [['$$', '$$'], ['\\[', '\\]']],
            processEscapes: true, // Allows \$ to escape dollar signs
        },
        options: {
            skipHtmlTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code'],
        },
    };

    // Function to add MathJax to the page
    function addMathJax(callback) {
        if (!window.MathJax || !window.MathJax.version) {
            let script = document.createElement('script');
            script.src = 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js';
            script.async = true;
            script.onload = function() {
                console.log('MathJax loaded');
                if (callback) callback();
            };
            script.onerror = function() {
                console.error('Failed to load MathJax. Please check your network or CDN availability.');
                // Retry in case of failure
                setTimeout(function(){ addMathJax(callback); }, 2000);
            };
            document.head.appendChild(script);
        } else {
            if (callback) callback();
        }
    }

    // Function to scan the document and render LaTeX
    function renderLatex() {
        try {
            if (window.MathJax && MathJax.typesetPromise) {
                MathJax.typesetPromise().catch(function (err) {
                    console.error('MathJax typeset failed:', err);
                });
            } else {
                console.log('MathJax not loaded yet. Retrying in 500ms...');
                setTimeout(renderLatex, 500);
            }
        } catch (error) {
            console.error('Error during LaTeX rendering:', error);
        }
    }

    // Initial injection after page fully loads
    window.addEventListener('load', function() {
        addMathJax(function() {
            // Initial render for existing content
            renderLatex();

            // Observe the DOM for changes and render LaTeX
            const observer = new MutationObserver(() => {
                // Throttle the renderLatex calls
                if (observer.renderTimeout) clearTimeout(observer.renderTimeout);
                observer.renderTimeout = setTimeout(renderLatex, 300);
            });

            observer.observe(document.body, { childList: true, subtree: true, characterData: true });
        });
    });

})();