userscript for TamperMonkey and the like - redirect wikipedia to grokipedia

wiki-to-groki.js

// ==UserScript==
// @name         Wikipedia to Grokipedia Redirector
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Redirect to Grokipedia if page exists
// @author       You
// @match        https://en.wikipedia.org/wiki/*
// @connect      grokipedia.com
// @grant        GM_xmlhttpRequest
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    // Extract page name from URL
    const match = window.location.pathname.match(/^\/wiki\/(.+)$/);
    if (!match) return;

    const pageName = match[1];
    const grokipediaUrl = `https://grokipedia.com/page/${pageName}`;

    // Check if page exists on Grokipedia
    GM_xmlhttpRequest({
        method: 'HEAD',
        url: grokipediaUrl,
        onload: function(response) {
            if (response.status === 200) {
                window.location.replace(grokipediaUrl);
            }
        },
        onerror: function(response) {
            // Page doesn't exist or error occurred, stay on Wikipedia
            console.log('Grokipedia check failed:', response.statusText);
        },
        ontimeout: function() {
            console.log('Grokipedia check timed out');
        },
        timeout: 3000 // 3 second timeout
    });
})();