68 lines
1.7 KiB
TypeScript
68 lines
1.7 KiB
TypeScript
'use client';
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import { createContext, useContext, useEffect, useState, startTransition } from 'react';
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type Theme = 'light' | 'dark';
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interface ThemeContextType {
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theme: Theme;
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setTheme: (theme: Theme) => void;
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}
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const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
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export function useTheme() {
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const context = useContext(ThemeContext);
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if (context === undefined) {
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throw new Error('useTheme must be used within a ThemeProvider');
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}
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return context;
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}
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interface ThemeProviderProps {
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children: React.ReactNode;
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}
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export function ThemeProvider({ children }: ThemeProviderProps) {
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const [theme, setThemeState] = useState<Theme>('dark'); // Default to dark mode
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const [mounted, setMounted] = useState(false);
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// Load theme from localStorage on mount
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useEffect(() => {
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const savedTheme = localStorage.getItem('theme') as Theme;
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if (savedTheme && (savedTheme === 'light' || savedTheme === 'dark')) {
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startTransition(() => {
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setThemeState(savedTheme);
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});
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}
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startTransition(() => {
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setMounted(true);
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});
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}, []);
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// Apply theme to document element
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useEffect(() => {
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if (mounted) {
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const root = document.documentElement;
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root.classList.remove('light', 'dark');
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root.classList.add(theme);
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}
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}, [theme, mounted]);
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const setTheme = (newTheme: Theme) => {
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setThemeState(newTheme);
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localStorage.setItem('theme', newTheme);
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};
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// Prevent hydration mismatch by not rendering until mounted
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if (!mounted) {
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return <div className="dark">{children}</div>;
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}
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return (
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<ThemeContext.Provider value={{ theme, setTheme }}>
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{children}
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</ThemeContext.Provider>
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);
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}
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