GridContent.js

import React, { PureComponent } from 'react';
import { connect } from 'dva';
import styles from './GridContent.less';

class GridContent extends PureComponent {
	render() {
		const { contentWidth, children } = this.props;
		let className = `${styles.main}`;
		if (contentWidth === 'Fixed') {
			className = `${styles.main} ${styles.wide}`;
		}
		return <div className={className}>{children}</div>;
	}
}

export default connect(({ settings }) => ({
	contentWidth: settings.contentWidth,
}))(GridContent);