insights-js/packages/rrweb/rrweb-snapshot/test/html/monkey-patched-elements.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script>
      // monkey patches .childNodes to make them unaccessible
      // emulates the effect of some frameworks, specifically salesforce lightning-ui
      Object.defineProperty(Element.prototype, 'childNodes', {
        get() {
          throw new Error('childNodes was hijacked by framework');
        },
      });

      Object.defineProperty(Node.prototype, 'childNodes', {
        get() {
          throw new Error('childNodes was hijacked by framework');
        },
      });

      Node.prototype.contains = function () {
        throw new Error('contains was hijacked by framework');
      };

      Node.prototype.getRootNode = function () {
        throw new Error('getRootNode was hijacked by framework');
      };

      MutationObserver = class {
        constructor() {
          throw new Error('MutationObserver was hijacked by framework');
        }
      };
    </script>
  </head>
  <body>
    <ul>
      <li>a</li>
      <li>b</li>
      <li>c</li>
      <li>d</li>
    </ul>
  </body>
</html>