53 lines
1.3 KiB
TypeScript
53 lines
1.3 KiB
TypeScript
import React, { createContext, useContext, useEffect, useState, ReactNode } 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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toggleTheme: () => void;
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}
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const ThemeContext = createContext<ThemeContextType | null>(null);
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export function ThemeProvider({ children }: { children: ReactNode }) {
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const [theme, setTheme] = useState<Theme>(() => {
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try {
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const stored = localStorage.getItem('melodymuse-theme');
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if (stored === 'light' || stored === 'dark') return stored;
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} catch {
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// ignore
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}
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return window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark';
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});
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useEffect(() => {
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const root = window.document.documentElement;
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if (theme === 'dark') {
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root.classList.add('dark');
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} else {
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root.classList.remove('dark');
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}
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try {
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localStorage.setItem('melodymuse-theme', theme);
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} catch {
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// ignore
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}
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}, [theme]);
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const toggleTheme = () => {
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setTheme((prev) => (prev === 'dark' ? 'light' : 'dark'));
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};
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return (
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<ThemeContext.Provider value={{ theme, toggleTheme }}>
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{children}
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</ThemeContext.Provider>
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);
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}
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export function useTheme() {
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const ctx = useContext(ThemeContext);
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if (!ctx) throw new Error('useTheme must be used within ThemeProvider');
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return ctx;
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}
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