const themes = {
light: { foreground: "#000000",
background: "#eeeeee"},
dark: { foreground: "#ffffff",
background: "#222222"}};const ThemeContext = React.createContext(themes.light);function App() {
return (
);}function Toolbar(props) {
return (
);}function ThemedButton() {
const theme = React.useContext(ThemeContext);
return (
);}