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c159ff4 | 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 | import { createContext, useContext, useEffect, useState } from "react"
const ThemeProviderContext = createContext({
theme: "system",
setTheme: () => null,
})
export function ThemeProvider({
children,
defaultTheme = "system",
storageKey = "vite-ui-theme",
...props
}) {
const [theme, setTheme] = useState(() => {
return localStorage.getItem(storageKey) || 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) => {
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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