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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | 71x 1159x 1128x 1159x 1131x 1131x 1131x 1122x 1122x 1122x 9x 1159x 4x 4x 1159x 71x 31x 30x 2x 28x | import type { ReactNode } from 'react';
import { createContext, useContext, useEffect, useState } from 'react';
type Theme = 'dark' | 'light' | 'system';
type ThemeProviderProps = {
children: ReactNode;
defaultTheme?: Theme;
storageKey?: string;
};
type ThemeProviderState = {
theme: Theme;
setTheme: (theme: Theme) => void;
};
const ThemeProviderContext = createContext<ThemeProviderState | undefined>(
undefined
);
export function ThemeProvider({
children,
defaultTheme = 'system',
storageKey = 'ui-theme',
...props
}: ThemeProviderProps) {
const [theme, setTheme] = useState<Theme>(
() => (localStorage.getItem(storageKey) as Theme) || defaultTheme
);
useEffect(() => {
const root = window.document.documentElement;
root.classList.remove('light', 'dark');
if (theme === 'system') {
const systemTheme = window.matchMedia('(prefers-color-scheme: dark)')
.matches
? 'dark'
: 'light';
root.classList.add(systemTheme);
return;
}
root.classList.add(theme);
}, [theme]);
const value = {
theme,
setTheme: (theme: Theme) => {
localStorage.setItem(storageKey, theme);
setTheme(theme);
},
};
return (
<ThemeProviderContext.Provider {...props} value={value}>
{children}
</ThemeProviderContext.Provider>
);
}
export const useTheme = () => {
const context = useContext(ThemeProviderContext);
if (context === undefined)
throw new Error('useTheme must be used within a ThemeProvider');
return context;
};
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