Twitter Auto Theme

Automatically switches between light and dark themes on Twitter.com (web version) based on system settings.

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         Twitter Auto Theme
// @namespace    https://techandnature.net/
// @version      0.1
// @description  Automatically switches between light and dark themes on Twitter.com (web version) based on system settings.
// @author       Christian Daus
// @match        https://twitter.com/*
// @run-at       document-start
// @license MIT
// ==/UserScript==

(function () {
  "use strict";
  const MAX_AGE = 60 * 60 * 24 * 365; //seconds in a year
  let currentNightMode = document.cookie
    .split(";")
    .find(cookie => cookie.includes("night_mode"))
    .split("=")[1];
  let newNightMode;
  let wasThemeSwitched = false;

  if (
    window.matchMedia &&
    window.matchMedia("(prefers-color-scheme: dark)").matches
  ) {
    newNightMode = "1";
  } else {
    newNightMode = "0";
  }

  if (newNightMode !== currentNightMode) {
    wasThemeSwitched = true;
    document.cookie = `night_mode=${newNightMode}; domain=.twitter.com; secure; max-age=${MAX_AGE}`;
  }

  console.log(
    `Twitter Auto Theme: Theme changed: ${wasThemeSwitched}, Night mode: ${newNightMode}`
  );
})();