Always focus

Always keeps page in a focused/active state

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Always focus 
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  Always keeps page in a focused/active state 
// @author       Yui-Koi
// @match        *://*/*
// @grant        none
// @run-at       document-start
// @license      GNU GPLv3
// ==/UserScript==

(function() {
    'use strict';
    
    const originalAddEventListener = EventTarget.prototype.addEventListener;
    const originalDispatchEvent = EventTarget.prototype.dispatchEvent;
    
    Object.defineProperty(Document.prototype, 'visibilityState', {
        get: function() {
            return 'visible';
        }
    });
    
    Object.defineProperty(Document.prototype, 'hidden', {
        get: function() {
            return false;
        }
    });
    
    const blockedEvents = ['visibilitychange', 'blur', 'focusout'];
    
   EventTarget.prototype.addEventListener = function(type, listener, options) {
        if (!blockedEvents.includes(type)) {
            originalAddEventListener.call(this, type, listener, options);
        }
    };
    
    EventTarget.prototype.dispatchEvent = function(event) {
        if (!blockedEvents.includes(event.type)) {
            return originalDispatchEvent.call(this, event);
        }
        return true;
    };
    
    console.log('Always focus script is running!');
})();