js get window custom global variables All In One

js get window custom global variables All In One

(function () {
  // Grab browser's default global variables.
  const iframe = window.document.createElement("iframe");
  iframe.src = "about:blank";
  window.document.body.appendChild(iframe);
  const browserDefaultGlobals = Object.keys(iframe.contentWindow);
  window.document.body.removeChild(iframe);
  // Get the global variables added at runtime by filtering out the browser's
  // default global variables from the current window object.
  const runtimeGlobals = Object.keys(window).filter((key) => !browserDefaultGlobals.includes(key));
  console.log("Runtime globals", runtimeGlobals);
})();

refs

https://mmazzarolo.com/blog/2022-02-14-find-what-javascript-variables-are-leaking-into-the-global-scope/

https://gist.github.com/mmazzarolo/4cc6ab1b3f176874336bf1ceb7dff6ef#file-runtime-globals-checker-js

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