focused-easyllama.user.js

// ==UserScript==
// @name         EasyLlama Anti Focus Detection
// @namespace    https://github.com/jukben
// @version      1.1
// @description  Prevents websites from detecting tab/window focus loss
// @author       jukben
// @match        *://*.mygo1.com/*
// @match        *://app.easyllama.com/*
// @run-at       document-start
// @grant        none
// @updateURL    https://gist.github.com/jukben/b62b389e7dcd0b10c4a64ef0bdafd5b4/raw/focused-easyllama.user.js
// @downloadURL  https://gist.github.com/jukben/b62b389e7dcd0b10c4a64ef0bdafd5b4/raw/focused-easyllama.user.js
// @homepageURL  https://gist.github.com/jukben/b62b389e7dcd0b10c4a64ef0bdafd5b4
// ==/UserScript==

(function() {
    'use strict';

    const log = (msg) => console.log(`%c[Anti-Focus] ${msg}`, 'color: #00cc88; font-weight: bold');

    log('Script loaded ✓');

    Object.defineProperty(document, 'hidden', { get: () => false });
    Object.defineProperty(document, 'visibilityState', { get: () => 'visible' });
    Document.prototype.hasFocus = () => true;
    log('Patched document.hidden, visibilityState, hasFocus()');

    document.addEventListener('visibilitychange', e => { e.stopImmediatePropagation(); log('Blocked visibilitychange event'); }, true);
    window.addEventListener('blur', e => { e.stopImmediatePropagation(); log('Blocked window blur'); }, true);
    window.addEventListener('focus', e => { e.stopImmediatePropagation(); log('Blocked window focus'); }, true);
    document.addEventListener('blur', e => { e.stopImmediatePropagation(); log('Blocked document blur'); }, true);
    document.addEventListener('focus', e => { e.stopImmediatePropagation(); log('Blocked document focus'); }, true);
    log('All event listeners installed ✓');
})();