import { useMemo } from "react"; import { ThemeProvider, createTheme, useMediaQuery, CssBaseline, } from "@material-ui/core"; import { RoomContextProvider } from "./context"; export const App = () => { const prefersDarkMode = useMediaQuery("(prefers-color-scheme: dark)"); const theme = useMemo( () => createTheme({ palette: { type: prefersDarkMode ? "dark" : "light", }, }), [prefersDarkMode] ); return ( Here goes content soon! ); };