Smart Dark Mode zzz

Dark mode that avoids inverting already dark sites, except Google, keeps images intact

当前为 2025-12-11 提交的版本，查看最新版本。

换行

// ==UserScript==
// @name         Smart Dark Mode zzz
// @namespace    https://github.com/EastSun5566
// @version      0.1.0
// @description  Dark mode that avoids inverting already dark sites, except Google, keeps images intact
// @author       Michael Wang + improved
// @license      MIT
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function () {
  const excludeDomains = [
    'google.com',
    'youtube.com',
    'maps.google.com'
  ];

  if (excludeDomains.some(d => location.hostname.includes(d))) return;

  function getAvgBrightness() {
    const elems = document.querySelectorAll('body, body *');
    let total = 0, count = 0;

    elems.forEach(el => {
      const cs = getComputedStyle(el);
      const bg = cs.backgroundColor;
      if (!bg || bg === 'rgba(0, 0, 0, 0)' || bg === 'transparent') return;
      const rgb = bg.match(/\d+/g)?.map(Number) || [];
      if (rgb.length === 3) {
        total += (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000;
        count++;
      }
    });

    if (count === 0) return 255; 
    return total / count;
  }

  const avg = getAvgBrightness();
  if (avg > 150) {
    const style = document.createElement('style');
    style.textContent = `
      html {
        filter: invert(1) hue-rotate(180deg) contrast(1.1) brightness(0.9) !important;
      }
      img, video, picture, canvas, iframe, embed {
        filter: none !important; //
      }
    `;
    document.head.appendChild(style);
  }
})();