35 lines
936 B
JavaScript
35 lines
936 B
JavaScript
import { createContext, useContext, useEffect, useState, useCallback } from 'react';
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const THEME_KEY = 'whowhat_theme';
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const ThemeContext = createContext(null);
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function applyTheme(theme) {
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const root = document.documentElement;
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if (theme === 'system') {
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root.removeAttribute('data-theme');
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} else {
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root.setAttribute('data-theme', theme);
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}
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}
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export function ThemeProvider({ children }) {
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const [theme, setThemeState] = useState(() => localStorage.getItem(THEME_KEY) || 'system');
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useEffect(() => {
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applyTheme(theme);
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}, [theme]);
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const setTheme = useCallback((t) => {
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localStorage.setItem(THEME_KEY, t);
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setThemeState(t);
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}, []);
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return <ThemeContext.Provider value={{ theme, setTheme }}>{children}</ThemeContext.Provider>;
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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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