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Absolute Visibility

Makes tabs and windows think they're visible even when they're not.

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/456228/1309113/Absolute%20Visibility.js 

// ==UserScript==
// @name         Absolute Visibility
// @namespace    https://naeembolchhi.github.io/
// @version      0.2
// @description  Makes tabs and windows think they're visible even when they're not.
// @author       NaeemBolchhi
// @license      Mozilla Public License 2.0
// @grant        none
// ==/UserScript==

const knife = `const script = document.currentScript;
const isFirefox = /Firefox/.test(navigator.userAgent) || typeof InstallTrigger !== 'undefined';

const block = e => {
	e.preventDefault();
	e.stopPropagation();
	e.stopImmediatePropagation();
};

const once = {
	focus: true,
	visibilitychange: true,
	webkitvisibilitychange: true
};

/* visibility */
Object.defineProperty(document, 'visibilityState', {
	get() {
		return 'visible';
	}
});
if (isFirefox === false) {
	Object.defineProperty(document, 'webkitVisibilityState', {
		get() {
			return 'visible';
		}
	});
}
document.addEventListener('visibilitychange', e => {
	script.dispatchEvent(new Event('state'));
	if (script.dataset.visibility !== 'false') {
		if (once.visibilitychange) {
			once.visibilitychange = false;
			return;
		}
		return block(e);
	}
}, true);
document.addEventListener('webkitvisibilitychange', e => {
	if (script.dataset.visibility !== 'false') {
		if (once.webkitvisibilitychange) {
			once.webkitvisibilitychange = false;
			return;
		}
		return block(e);
	}
}, true);


window.addEventListener('pagehide', e => script.dataset.visibility !== 'false' && block(e), true);

/* hidden */
Object.defineProperty(document, 'hidden', {
	get() {
		return false;
	}
});
Object.defineProperty(document, isFirefox ? 'mozHidden' : 'webkitHidden', {
	get() {
		return false;
	}
});

/* focus */
Document.prototype.hasFocus = new Proxy(Document.prototype.hasFocus, {
	apply(target, self, args) {
		if (script.dataset.focus !== 'false') {
			return true;
		}
		return Reflect.apply(target, self, args);
	}
});

const onfocus = e => {
	if (script.dataset.focus !== 'false') {
		if (e.target === document || e.target === window) {
			if (once.focus && document.readyState === 'complete' && e.target === window) {
				once.focus = false;
				return;
			}
			return block(e);
		}
	}
};
// document.addEventListener('focus', onfocus, true);
window.addEventListener('focus', onfocus, true);


/* blur */
const onblur = e => {
	if (script.dataset.blur !== 'false') {
		if (e.target === document || e.target === window) {
			return block(e);
		}
	}
};
document.addEventListener('blur', onblur, true);
window.addEventListener('blur', onblur, true);

/* mouse */
window.addEventListener('mouseleave', e => {
	if (script.dataset.mouseleave !== 'false') {
		if (e.target === document || e.target === window) {
			return block(e);
		}
	}
}, true);

/* requestAnimationFrame */
let lastTime = 0;
window.requestAnimationFrame = new Proxy(window.requestAnimationFrame, {
	apply(target, self, args) {
		if (script.dataset.hidden === 'true') {
			const currTime = Date.now();
			const timeToCall = Math.max(0, 16 - (currTime - lastTime));
			const id = window.setTimeout(function() {
				args[0](performance.now());
			}, timeToCall);
			lastTime = currTime + timeToCall;
			return id;
		} else {
			return Reflect.apply(target, self, args);
		}
	}
});
window.cancelAnimationFrame = new Proxy(window.cancelAnimationFrame, {
	apply(target, self, args) {
		if (script.dataset.hidden === 'true') {
			clearTimeout(args[0]);
		}
		return Reflect.apply(target, self, args);
	}
});`;

(function eyeStabber() {
    let html, script;
    html = document.documentElement;
    if (!html) {window.location.reload();}
    script = document.createElement("script");
    script.setAttribute("type", "text/javascript");
    script.innerHTML = knife;
    html.appendChild(script);
    script.remove();
})();