40 lines
985 B
TypeScript
40 lines
985 B
TypeScript
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'use client';
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import { createContext, useContext, useState, useEffect, 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 | undefined>(undefined);
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export function ThemeProvider({ children }: { children: ReactNode }) {
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const [theme, setTheme] = useState<Theme>('light');
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const toggleTheme = () => {
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setTheme(prev => prev === 'light' ? 'dark' : 'light');
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};
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useEffect(() => {
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// 在 DOM 上设置主题属性，让 CSS 能够根据主题变化
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document.documentElement.setAttribute('data-theme', theme);
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}, [theme]);
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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 context = useContext(ThemeContext);
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if (!context) {
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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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