get globals of a webpage

getGlobals.js

const getGlobals = (() => {
  const diff = (a, b) => a.filter((v) => !b.includes(v))

  const windowProps = JSON.parse(
    '["window","self","document","name","location","customElements","history","locationbar","menubar","personalbar","scrollbars","statusbar","toolbar","status","closed","frames","length","top","opener","parent","frameElement","navigator","origin","external","screen","innerWidth","innerHeight","scrollX","pageXOffset","scrollY","pageYOffset","visualViewport","screenX","screenY","outerWidth","outerHeight","devicePixelRatio","clientInformation","screenLeft","screenTop","defaultStatus","defaultstatus","styleMedia","onsearch","isSecureContext","performance","onappinstalled","onbeforeinstallprompt","crypto","indexedDB","webkitStorageInfo","sessionStorage","localStorage","onbeforexrselect","onabort","onblur","oncancel","oncanplay","oncanplaythrough","onchange","onclick","onclose","oncontextmenu","oncuechange","ondblclick","ondrag","ondragend","ondragenter","ondragleave","ondragover","ondragstart","ondrop","ondurationchange","onemptied","onended","onerror","onfocus","onformdata","oninput","oninvalid","onkeydown","onkeypress","onkeyup","onload","onloadeddata","onloadedmetadata","onloadstart","onmousedown","onmouseenter","onmouseleave","onmousemove","onmouseout","onmouseover","onmouseup","onmousewheel","onpause","onplay","onplaying","onprogress","onratechange","onreset","onresize","onscroll","onseeked","onseeking","onselect","onstalled","onsubmit","onsuspend","ontimeupdate","ontoggle","onvolumechange","onwaiting","onwebkitanimationend","onwebkitanimationiteration","onwebkitanimationstart","onwebkittransitionend","onwheel","onauxclick","ongotpointercapture","onlostpointercapture","onpointerdown","onpointermove","onpointerup","onpointercancel","onpointerover","onpointerout","onpointerenter","onpointerleave","onselectstart","onselectionchange","onanimationend","onanimationiteration","onanimationstart","ontransitionrun","ontransitionstart","ontransitionend","ontransitioncancel","onafterprint","onbeforeprint","onbeforeunload","onhashchange","onlanguagechange","onmessage","onmessageerror","onoffline","ononline","onpagehide","onpageshow","onpopstate","onrejectionhandled","onstorage","onunhandledrejection","onunload","alert","atob","blur","btoa","cancelAnimationFrame","cancelIdleCallback","captureEvents","clearInterval","clearTimeout","close","confirm","createImageBitmap","fetch","find","focus","getComputedStyle","getSelection","matchMedia","moveBy","moveTo","open","postMessage","print","prompt","queueMicrotask","releaseEvents","reportError","requestAnimationFrame","requestIdleCallback","resizeBy","resizeTo","scroll","scrollBy","scrollTo","setInterval","setTimeout","stop","webkitCancelAnimationFrame","webkitRequestAnimationFrame","chrome","caches","cookieStore","ondevicemotion","ondeviceorientation","ondeviceorientationabsolute","showDirectoryPicker","showOpenFilePicker","showSaveFilePicker","originAgentCluster","trustedTypes","speechSynthesis","onpointerrawupdate","crossOriginIsolated","scheduler","openDatabase","webkitRequestFileSystem","webkitResolveLocalFileSystemURL"]'
  )

  return () => {
    return diff(Object.keys(window), windowProps).reduce((acc, prop) => {
      acc[prop] = window[prop]
      return acc
    }, {})
  }
})()

function getGlobals2() {
  const diff = (a, b) => a.filter((v) => !b.includes(v))

  const w = window.open()
  w.close()

  return diff(Object.keys(window), Object.keys(w)).reduce((acc, prop) => {
    acc[prop] = window[prop]
    return acc
  }, {})
}