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// theme-toggle.js
(function() {
const STORAGE_KEY = 'danix-theme';
const DARK_CLASS = 'theme-dark';
const LIGHT_CLASS = 'theme-light';
// Initialize theme on page load
function init() {
const saved = localStorage.getItem(STORAGE_KEY);
const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
const isDark = saved === null ? prefersDark : saved === 'dark';
applyTheme(isDark ? 'dark' : 'light');
}
// Apply theme to document
function applyTheme(theme) {
const html = document.documentElement;
html.classList.remove(DARK_CLASS, LIGHT_CLASS);
if (theme === 'dark') {
html.classList.remove(LIGHT_CLASS);
localStorage.setItem(STORAGE_KEY, 'dark');
} else {
html.classList.add(LIGHT_CLASS);
localStorage.setItem(STORAGE_KEY, 'light');
}
}
// Get current theme
function getCurrentTheme() {
return document.documentElement.classList.contains(LIGHT_CLASS) ? 'light' : 'dark';
}
// Toggle theme
function toggleTheme() {
const current = getCurrentTheme();
const next = current === 'dark' ? 'light' : 'dark';
applyTheme(next);
// Dispatch custom event for other scripts to listen
window.dispatchEvent(new CustomEvent('theme-changed', { detail: { theme: next } }));
}
// Setup toggle button
function setupToggleButton() {
const btn = document.getElementById('theme-switch');
if (btn) {
btn.addEventListener('click', toggleTheme);
updateToggleButtonUI();
// Listen for theme changes to update button UI
window.addEventListener('theme-changed', updateToggleButtonUI);
}
}
function updateToggleButtonUI() {
const btn = document.getElementById('theme-switch');
if (btn) {
const current = getCurrentTheme();
if (current === 'light') {
btn.classList.add('light');
} else {
btn.classList.remove('light');
}
}
}
// Initialize on DOMContentLoaded
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', function() {
init();
setupToggleButton();
});
} else {
init();
setupToggleButton();
}
// Expose to global scope for testing
window.ThemeToggle = {
toggle: toggleTheme,
set: applyTheme,
get: getCurrentTheme,
};
})();
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