-
-
Save Oluwasetemi/f5022aeb3d5c5196cb66511182dd55bf to your computer and use it in GitHub Desktop.
🌑☀️mode theming hook
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import * as React from "react"; | |
type Theme = "system" | "light" | "dark"; | |
const STORAGE_KEY = "theme"; | |
const VALID_THEMES: Theme[] = ["system", "light", "dark"]; | |
const DARK_MODE_MEDIA_QUERY = "(prefers-color-scheme: dark)"; | |
function getAppTheme(): Theme { | |
if (typeof window !== "undefined") { | |
const storage = window.localStorage.getItem(STORAGE_KEY) as Theme; | |
const config: Theme = VALID_THEMES.includes(storage) ? storage : "system"; | |
if (config === "system") { | |
return window.matchMedia(DARK_MODE_MEDIA_QUERY).matches | |
? "dark" | |
: "light"; | |
} else { | |
return config; | |
} | |
} else { | |
return "system"; | |
} | |
} | |
function setAppTheme(theme: Theme) { | |
if (VALID_THEMES.includes(theme)) { | |
window.localStorage.setItem(STORAGE_KEY, theme); | |
if (theme !== "system") { | |
window.document.documentElement.setAttribute("data-theme", theme); | |
} else { | |
window.document.documentElement.removeAttribute("data-theme"); | |
} | |
} | |
} | |
const ThemeContext = React.createContext(undefined); | |
export function AppThemeProvider({ children }: { children: React.ReactNode }) { | |
const [theme, setTheme] = React.useState(getAppTheme); | |
const handleThemeChange = (event: MediaQueryListEvent) => { | |
const theme = event.matches ? "dark" : "light"; | |
setTheme(theme); | |
}; | |
React.useEffect(() => { | |
setAppTheme(theme); | |
}, [theme]); | |
React.useEffect(() => { | |
const mediaQuery = window.matchMedia(DARK_MODE_MEDIA_QUERY); | |
mediaQuery.addListener(handleThemeChange); | |
return () => { | |
mediaQuery.removeListener(handleThemeChange); | |
}; | |
}, []); | |
return ( | |
<ThemeContext.Provider value={{ theme }}>{children}</ThemeContext.Provider> | |
); | |
} | |
export default function useAppTheme() { | |
const { theme } = React.useContext(ThemeContext); | |
return theme; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment