CSS Prefer Dark Mode

Tells CSS in all pages to use the new CSS "prefers-color-scheme: dark" mode.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

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

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

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

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

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

(У мене вже є менеджер скриптів, дайте мені встановити його!)

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.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         CSS Prefer Dark Mode
// @namespace    http://j1.io/
// @version      0.1
// @description  Tells CSS in all pages to use the new CSS "prefers-color-scheme: dark" mode.
// @author       jswny
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    var styleTags = document.getElementsByTagName("style");
    var content = `
    /* Text and background color for light mode */
    body {
      color: #333;
    }

    /* Text and background color for dark mode */
    @media (prefers-color-scheme: dark) {
      body {
        color: #ddd;
        background-color: #222;
      }
    }
    `;

    if (styleTags.length == 0) {
    var newStyleTag = document.createElement("style");
    newStyleTag.innerHTML = content;
    document.body.appendChild(newStyleTag);
    } else {
    styleTags[0].innerHTML += content;
    }
})();