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ThemeProvider.js
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ThemeProvider.js
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import React from 'react';
import PropTypes from 'prop-types';
import deepmerge from 'deepmerge';
import colors from './colors';
const ThemeContext = React.createContext();
export default class ThemeProvider extends React.Component {
constructor(props) {
super(props);
this.defaultTheme = deepmerge(
{
colors,
},
props.theme
);
this.state = {
theme: this.defaultTheme,
};
}
updateTheme = updates => {
this.setState(({ theme }) => ({
theme: deepmerge(theme, updates),
}));
};
replaceTheme = theme => {
this.setState(() => ({
theme: deepmerge(this.defaultTheme, theme),
}));
};
getTheme = () => this.state.theme;
render() {
return (
<ThemeContext.Provider
value={{
theme: this.state.theme,
updateTheme: this.updateTheme,
replaceTheme: this.replaceTheme,
}}
>
{this.props.children}
</ThemeContext.Provider>
);
}
}
ThemeProvider.propTypes = {
theme: PropTypes.object,
children: PropTypes.node.isRequired,
};
ThemeProvider.defaultProps = {
theme: {},
};
export const ThemeConsumer = ThemeContext.Consumer;