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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 | 20x 20x 43x 43x 43x 43x 43x 20x | import React, { useCallback, useMemo, useState } from 'react'; import { oneOf, node } from 'prop-types'; import { ThemeProvider } from 'styled-components'; import ModeContext from './ModeContext'; const propTypes = { initialMode: oneOf(['light', 'dark']), children: node.isRequired, }; const ModeProvider = ({ initialMode = 'light', children }) => { const [mode, setMode] = useState(initialMode); const toggleMode = useCallback( () => setMode(prevMode => (prevMode === 'light' ? 'dark' : 'light')), [] ); const value = useMemo( () => ({ mode, toggleMode, }), [mode, toggleMode] ); return ( <ModeContext.Provider value={value}> <ThemeProvider theme={{ mode }}>{children}</ThemeProvider> </ModeContext.Provider> ); }; ModeProvider.propTypes = propTypes; export default ModeProvider; |