Youtube Automatic Theme

Automatically toggle dark/light theme

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

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

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         Youtube Automatic Theme
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Automatically toggle dark/light theme
// @author       [email protected]
// @run-at       document-idle
// @match        https://www.youtube.com/**
// @grant        none
// ==/UserScript==

(function () {
    "use strict";

    const getAvatarButton = () => {
        return new Promise((resolve) => {
            const button = document.getElementById("avatar-btn");
            resolve(button);
        });
    };

    const getMenuButton = () => {
        return new Promise((resolve) => {
            const menu = document.getElementsByClassName(
                "style-scope yt-multi-page-menu-section-renderer"
            )[14];
            resolve(menu);
        });
    };

    const renderButton = async () => {
        return new Promise(async (resolve) => {
            let avatar;
            let menu;
            avatar = await getAvatarButton();
            avatar.click();
            setTimeout(async () => {
                menu = await getMenuButton();
                menu.click();
                avatar.click();
                resolve("done");
            }, 2000);
        });
    };

    const toggleTheme = () => {
        if (window.matchMedia) {
            var isDarkMode = document
            .querySelector("paper-toggle-button")
            .hasAttribute("checked");
            if (window.matchMedia("(prefers-color-scheme: light)").matches) {
                if (isDarkMode) document.getElementById("toggleButton").click();
            }
            if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
                if (!isDarkMode) document.getElementById("toggleButton").click();
            }
        }
    };

    const start = () => {
        renderButton().then((res) => {
            toggleTheme();
        });
    };

    start();
})();