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GitHub Passkey Redirector

Redirects GitHub login page so that Passkey logon is enabled.

  1. // ==UserScript==
  2. // @name         GitHub Passkey Redirector
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.2.1
  5. // @description  Redirects GitHub login page so that Passkey logon is enabled.
  6. // @author       DanTheMan827
  7. // @license MIT
  8. // @match        https://github.com/*
  9. // @icon         https://www.google.com/s2/favicons?sz=64&domain=github.com
  10. // @grant        none
  11. // ==/UserScript==
  12. // Special thanks to ChatGPT.
  13. (function() {
  14.     'use strict';
  15.     function checkPage() {
  16.         const currentURL = window.location.href;
  17.  
  18.         if (currentURL.startsWith("https://github.com/login?") || currentURL == "https://github.com/login") {
  19.             const urlSearchParams = new URLSearchParams(currentURL.split('?')[1]);
  20.  
  21.             if (!urlSearchParams.has('passkey') || urlSearchParams.get('passkey') !== 'true') {
  22.                 urlSearchParams.set('passkey', 'true');
  23.                 history.replaceState(null, null, `https://github.com/login?${urlSearchParams.toString()}`);
  24.                 location.reload();
  25.             }
  26.         }
  27.     }
  28.  
  29.     var _wr = function(type) {
  30.         var orig = history[type];
  31.         return function() {
  32.             var rv = orig.apply(this, arguments);
  33.             var e = new Event(type);
  34.             e.arguments = arguments;
  35.             window.dispatchEvent(e);
  36.             return rv;
  37.         };
  38.     };
  39.  
  40.     history.replaceState = _wr('replaceState');
  41.  
  42.     // Use it like this:
  43.     window.addEventListener('replaceState', () => checkPage());
  44. })();