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根据网页源代码，很久以前，知乎网页版就已经有了暗色主题。设置项都有了。但官方迟迟不开放使用。等不下去了，先这样了。现已支持切换主题。使用按钮切换主题后，如果页面显示有错误，刷新即可。
// ==UserScript==
// @name 知乎 - 强行启用暗色主题
// @description 根据网页源代码，很久以前，知乎网页版就已经有了暗色主题。设置项都有了。但官方迟迟不开放使用。等不下去了，先这样了。现已支持切换主题。使用按钮切换主题后，如果页面显示有错误，刷新即可。
// @namespace RainSlide
// @author RainSlide
// @license blessing
// @icon https://static.zhihu.com/static/favicon.ico
// @version 1.2
// @match https://*.zhihu.com/*
// @inject-into context
// @run-at document-start
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// ==/UserScript==
"use strict";
const name = "data-theme";
const d = document.documentElement;
Object.defineProperties(
this, {
localTheme: {
configurable: true,
enumerable: false,
get: () => GM_getValue(name),
set: value => GM_setValue(name, value)
},
pageTheme: {
configurable: true,
enumerable: false,
get: () => d.getAttribute(name),
set: value => d.setAttribute(name, value)
}
}
);
const dark = "dark";
const light = "light";
// 将 localTheme 的值同步至 pageTheme
const sync = () => {
if (pageTheme !== localTheme) {
pageTheme = localTheme;
}
};
sync();
setInterval(sync, 2000);
// 强行启用暗色主题
localTheme === dark &&
document.addEventListener(
"DOMContentLoaded", () => {
const data = document.getElementById("js-initialData");
if (data !== null) {
data.textContent = data.textContent.replace(
'"theme":"light"', '"theme":"dark"'
);
}
}
);
// 切换主题
const switchTheme = () => {
switch (localTheme) {
case dark: pageTheme = localTheme = light; break;
case light: pageTheme = localTheme = dark; break;
default:
console.warn("localTheme is not dark or light!");
pageTheme = localTheme = dark;
}
};
const label = "切换主题";
// 脚本管理器菜单按钮
typeof GM_registerMenuCommand === "function" &&
GM_registerMenuCommand(label, switchTheme);
// 页面右下角按钮
// 图标来自 Google Material Icons
const icon = `<svg xmlns="http://www.w3.org/2000/svg" class="Zi" aria-label="${ label }" fill="currentColor" width="24" height="24" viewBox="0 0 24 24"><path d="M0 0h24v24H0V0z" fill="none"/><path d="M20 8.69V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12 20 8.69zM12 18c-.89 0-1.74-.2-2.5-.55C11.56 16.5 13 14.42 13 12s-1.44-4.5-3.5-5.45C10.26 6.2 11.11 6 12 6c3.31 0 6 2.69 6 6s-2.69 6-6 6z"/></svg>`;
window.addEventListener(
"load", () => {
const buttons = document.querySelector('.CornerButtons');
if (buttons !== null) {
const container = document.createElement("div");
const button = document.createElement("button");
container.className = "CornerAnimayedFlex";
button.type = "button";
button.className = "Button CornerButton Button--plain";
button.innerHTML = icon;
button.setAttribute("aria-label", label);
button.setAttribute("data-tooltip", label);
button.setAttribute("data-tooltip-position", "left");
button.setAttribute("data-tooltip-will-hide-on-click", "true");
button.addEventListener("mouseenter", sync);
button.addEventListener("focus", sync);
button.addEventListener("click", switchTheme);
container.appendChild(button);
buttons.insertBefore(container, buttons.firstElementChild);
}
}
);
/*
<div class="CornerAnimayedFlex">
<button data-tooltip="暗色主题" data-tooltip-position="left" data-tooltip-will-hide-on-click="true" aria-label="暗色主题" type="button" class="Button CornerButton Button--plain">
<svg xmlns="http://www.w3.org/2000/svg" class="Zi" aria-label="暗色主题" fill="currentColor" width="24" height="24" viewBox="0 0 24 24"><path d="M0 0h24v24H0V0z" fill="none"/><path d="M20 8.69V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12 20 8.69zM12 18c-.89 0-1.74-.2-2.5-.55C11.56 16.5 13 14.42 13 12s-1.44-4.5-3.5-5.45C10.26 6.2 11.11 6 12 6c3.31 0 6 2.69 6 6s-2.69 6-6 6z"/></svg>
</button>
</div>
*/