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main.jsx
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/**
* Copyright © 2016-present Konstantin Tarkus <[email protected]>
*/
import React from 'react';
import PropTypes from 'prop-types';
/**
* Conditionally adds CSS class name(s) to document.body. For example:
*
* <Body className="dark" if={this.context.theme.isDark} />
*/
class Body extends React.Component {
static defaultProps = {
if: true,
};
static propTypes = {
className: PropTypes.string.isRequired,
if: PropTypes.bool.isRequired,
};
componentDidMount() {
if (this.props.if) {
this.props.className.split(' ').forEach(c => {
document.body.classList.add(c);
});
}
}
shouldComponentUpdate(nextProps) {
return this.props.if !== nextProps.if || this.props.className !== nextProps;
}
componentDidUpdate() {
this.props.className.split(' ').forEach(c => {
document.body.classList[this.props.if ? 'add' : 'remove'](c);
});
}
componentWillUnmount() {
this.props.className.split(' ').forEach(c => {
document.body.classList.remove(c);
});
}
render() {
return this.props.if ? <script
dangerouslySetInnerHTML={{
__html: this.props.className.split(' ').map(c => `document.body.classList.add(${c});`).join(' '),
}}
/> : null;
}
}
export default Body;