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Block online_current.js

Blocks the online_current.js script from loading

  1. // ==UserScript==
  2. // @name         Block online_current.js
  3. // @namespace    https://instructure-uploads.s3.amazonaws.com/
  4. // @version      1.0
  5. // @description  Blocks the online_current.js script from loading
  6. // @match        *://*.instructure.com/*
  7. // @match        *://instructure-uploads.s3.amazonaws.com/*
  8. // @run-at       document-start
  9. // @grant        none
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     var observer = new MutationObserver(function(mutations, observer) {
  14.         var scripts = document.querySelectorAll("script[src*='online_current.js']");
  15.         scripts.forEach(script => {
  16.             script.remove(); // Remove the script if found
  17.             console.log("Blocked: " + script.src);
  18.         });
  19.     });
  20.  
  21.     observer.observe(document, { childList: true, subtree: true });
  22.  
  23.     // Prevent the script from being added dynamically
  24.     const originalCreateElement = document.createElement;
  25.     document.createElement = function(tagName, options) {
  26.         if (tagName.toLowerCase() === 'script') {
  27.             const scriptElement = originalCreateElement.apply(this, arguments);
  28.             Object.defineProperty(scriptElement, 'src', {
  29.                 set: function(value) {
  30.                     if (value.includes('online_current.js')) {
  31.                         console.log("Blocked script injection: " + value);
  32.                         return;
  33.                     }
  34.                     scriptElement.setAttribute('src', value);
  35.                 },
  36.                 get: function() {
  37.                     return scriptElement.getAttribute('src');
  38.                 }
  39.             });
  40.             return scriptElement;
  41.         }
  42.         return originalCreateElement.apply(this, arguments);
  43.     };
  44. })();