Remove ad for Reader Mode Pro in ReaderMode extension

Removes bottom right block advertising "Reader Mode Pro", the paid version of readermode.io

Задайце пытанне, пакіньце водгук або паскардзіцеся на скрыпт.

Wrap lines

// ==UserScript==
// @name         Remove ad for Reader Mode Pro in ReaderMode extension
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Removes bottom right block advertising "Reader Mode Pro", the paid version of readermode.io
// @author       https://greasyfork.org/en/users/728793-keyboard-shortcuts
// @match        https://*/*
// @match        http://*/*
// @icon         https://lh3.googleusercontent.com/enMBRM7MzaKfxzyEJpzH9KIlyxcs0T2kkqteBVvTF1ti1ESTgBb4Ox818fqhUM86J0JaNktU6wFvMSSUf9JhAwPWKg=w256-h256-e365-rj-sc0x00ffffff
// @grant        none
// @license      MIT
// ==/UserScript==

/* jshint esversion: 6 */
(function() {
    // Written by a Reader Mode user who's annoyed enough at the constant advertising to write a script to remove it.

    'use strict';

    var readerProTimer = null;
    readerProTimer = setInterval(function() {
        const ids = ['cr-pro-features-modal', 'cr-pro-features-tooltip'];
        const iframes = Array.from(document.getElementsByTagName('iframe')).filter(iframe => iframe.contentDocument);
        for (var iframe of iframes) {
            for (var id of ids) {
                const el = iframe.contentDocument.getElementById(id); // Reader Mode creates an iframe, so we have to look for this element in there.
                if (el) {
                    el.remove();
                    clearInterval(readerProTimer);
                }
            }
        }
    }, 1000);
})();