47 lines
1.3 KiB
TypeScript
47 lines
1.3 KiB
TypeScript
export type Theme = 'light' | 'dark';
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export function getThemePreference(): Theme {
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if (typeof localStorage !== 'undefined' && localStorage.getItem('theme')) {
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return localStorage.getItem('theme') as Theme;
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}
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return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
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}
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export function isDark() {
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return getThemePreference() === 'dark';
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}
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export function setTheme(theme: Theme) {
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localStorage.setItem('theme', theme);
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reflectPreference(theme);
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}
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export function reflectPreference(theme: Theme) {
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document.documentElement.setAttribute('data-theme', theme);
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const themeColorMeta = document.querySelector('meta[name="theme-color"]');
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if (themeColorMeta) {
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themeColorMeta.setAttribute('content', theme === 'dark' ? '#0f172a' : '#ffffff');
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}
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}
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// Initialize theme on page load
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export function initTheme() {
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const theme = getThemePreference();
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reflectPreference(theme);
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// Listen for system theme changes
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window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', (e) => {
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if (!localStorage.getItem('theme')) {
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reflectPreference(e.matches ? 'dark' : 'light');
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}
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});
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}
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// Toggle theme function
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export function toggleTheme() {
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const currentTheme = getThemePreference();
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const newTheme = currentTheme === 'light' ? 'dark' : 'light';
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setTheme(newTheme);
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return newTheme;
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}
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