import React, { createContext, Component } from 'react'; const ThemeContext = createContext(); class ThemeProvider extends Component { state = { theme: false, }; toggleTheme = () => { this.setState((prevState) => ({ theme: !prevState.theme })); }; render() { return ( {this.props.children} ); } } const ThemeConsumer = ThemeContext.Consumer; export { ThemeProvider, ThemeConsumer, ThemeContext };