| // Copyright 2018 The Chromium Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| cr.addWebUIListener('dark-mode-changed', darkMode => { | |
| document.documentElement.toggleAttribute('dark', darkMode); | |
| }); | |
| chrome.send('observeDarkMode'); | |
| /** @return {boolean} Whether the page is in dark mode. */ | |
| function inDarkMode() { | |
| return document.documentElement.hasAttribute('dark'); | |
| } |