List all properties of window object

list.js

(() => {
    let iframe = document.createElement('iframe')
    iframe.style.display = 'none'
    document.body.appendChild(iframe)
    let results = {}
    for (k of Object.getOwnPropertyNames(window)) {
        if (iframe.contentWindow.hasOwnProperty(k)) {
            continue
        }

        if (typeof(window[k]) === 'function') {
            continue
        }

        results[k] = window[k]
    }
    document.body.removeChild(iframe)
    return results
})();