Adds a Light/Dark mode toggle at the bottom left
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// ==UserScript==
// @name Grok Theme Toggle
// @namespace nisc
// @version 2025.06.08-A
// @description Adds a Light/Dark mode toggle at the bottom left
// @homepageURL https://github.com/nisc/grok-userscripts/
// @author nisc
// @match https://grok.com/*
// @icon https://grok.com/images/favicon-light.png
// @run-at document-end
// @grant none
// ==/UserScript==
(function() {
'use strict';
const CONFIG = {
THEME: {
KEY: 'forcedTheme',
MODES: {
DARK: 'dark',
LIGHT: 'light'
},
DEFAULT: 'dark',
COLORS: {
dark: { bg: '#333', text: '#fff', border: '#333' },
light: { bg: '#fff', text: '#000', border: '#333' }
},
ICONS: {
dark: '🌕',
light: '🌑'
}
},
UI: {
POSITION_MARGIN: 20,
BUTTON_STYLES: {
position: 'fixed',
zIndex: '10000',
padding: '8px 12px',
border: '0.25px solid #333',
borderRadius: '8px',
cursor: 'pointer',
fontSize: '14px',
boxShadow: '0 2px 5px rgba(0,0,0,0.2)'
},
LIGHT_MODE_STYLES: `
.light .text-xs.font-semibold {
color: #000 !important;
}
`
}
};
// Track current theme state
let currentTheme = localStorage.getItem(CONFIG.THEME.KEY) || CONFIG.THEME.DEFAULT;
/**
* Applies theme to document root only if it differs from current state
* Handles both class names and color-scheme property
*/
function applyTheme(theme) {
const htmlElement = document.documentElement;
const isDark = htmlElement.classList.contains(CONFIG.THEME.MODES.DARK);
const isLight = htmlElement.classList.contains(CONFIG.THEME.MODES.LIGHT);
if (theme === CONFIG.THEME.MODES.DARK && !isDark) {
htmlElement.classList.add(CONFIG.THEME.MODES.DARK);
htmlElement.classList.remove(CONFIG.THEME.MODES.LIGHT);
htmlElement.style.setProperty('color-scheme', CONFIG.THEME.MODES.DARK, 'important');
} else if (theme === CONFIG.THEME.MODES.LIGHT && !isLight) {
htmlElement.classList.add(CONFIG.THEME.MODES.LIGHT);
htmlElement.classList.remove(CONFIG.THEME.MODES.DARK);
htmlElement.style.setProperty('color-scheme', CONFIG.THEME.MODES.LIGHT, 'important');
}
}
// Create and inject custom style element
const styleElement = document.createElement('style');
document.head.appendChild(styleElement);
/**
* Updates custom styles based on current theme
* Primarily handles special cases for light mode
*/
function updateStyles(theme) {
styleElement.textContent = theme === CONFIG.THEME.MODES.LIGHT ? CONFIG.UI.LIGHT_MODE_STYLES : '';
}
/**
* Toggles between light and dark themes
* Updates localStorage, applies theme, and updates UI
*/
function toggleTheme() {
currentTheme = currentTheme === CONFIG.THEME.MODES.DARK ?
CONFIG.THEME.MODES.LIGHT : CONFIG.THEME.MODES.DARK;
localStorage.setItem(CONFIG.THEME.KEY, currentTheme);
applyTheme(currentTheme);
updateStyles(currentTheme);
updateButtonAppearance();
}
/**
* Updates toggle button appearance based on current theme
* Changes icon, background, text, and border colors
*/
function updateButtonAppearance() {
const themeColors = CONFIG.THEME.COLORS[currentTheme];
toggleButton.textContent = CONFIG.THEME.ICONS[currentTheme];
toggleButton.style.backgroundColor = themeColors.bg;
toggleButton.style.color = themeColors.text;
toggleButton.style.borderColor = themeColors.border;
}
// Create and configure theme toggle button
const toggleButton = document.createElement('button');
Object.assign(toggleButton.style, CONFIG.UI.BUTTON_STYLES);
updateButtonAppearance();
toggleButton.addEventListener('click', toggleTheme);
document.body.appendChild(toggleButton);
// Position button at bottom left
const buttonHeight = toggleButton.offsetHeight;
const initialLeft = CONFIG.UI.POSITION_MARGIN;
const initialTop = Math.max(0, window.innerHeight - buttonHeight - CONFIG.UI.POSITION_MARGIN);
toggleButton.style.left = `${initialLeft}px`;
toggleButton.style.top = `${initialTop}px`;
// Always maintain bottom left position on window resize
window.addEventListener('resize', () => {
const buttonHeight = toggleButton.offsetHeight;
const newTop = Math.max(0, window.innerHeight - buttonHeight - CONFIG.UI.POSITION_MARGIN);
toggleButton.style.top = `${newTop}px`;
});
// Initialize theme
applyTheme(currentTheme);
updateStyles(currentTheme);
// Watch for external theme changes and maintain chosen theme
const observer = new MutationObserver(mutations => {
mutations.forEach(mutation => {
if (mutation.type === 'attributes' &&
(mutation.attributeName === 'class' || mutation.attributeName === 'style')) {
applyTheme(currentTheme);
}
});
});
observer.observe(document.documentElement, {
attributes: true,
attributeFilter: ['class', 'style']
});
})();