React expandable table rows example

tableRenderingExample.js

class ParentComponent extends Component {
    constructor() {
        super();
        
        this.state = {
            data : [
                {id : 1, date : "2014-04-18", total : 121.0, status : "Shipped", name : "A", points: 5, percent : 50},
                {id : 2, date : "2014-04-21", total : 121.0, status : "Not Shipped", name : "B", points: 10, percent: 60},
                {id : 3, date : "2014-08-09", total : 121.0, status : "Not Shipped", name : "C", points: 15, percent: 70},
                {id : 4, date : "2014-04-24", total : 121.0, status : "Shipped", name : "D", points: 20, percent : 80},
                {id : 5, date : "2014-04-26", total : 121.0, status : "Shipped", name : "E", points: 25, percent : 90},
            ],
            expandedRows : []
        };
    }

    handleRowClick(rowId) {
        const currentExpandedRows = this.state.expandedRows;
        const isRowCurrentlyExpanded = currentExpandedRows.includes(rowId);
        
        const newExpandedRows = isRowCurrentlyExpanded ? 
			currentExpandedRows.filter(id => id !== rowId) : 
			currentExpandedRows.concat(rowId);
        
        this.setState({expandedRows : newExpandedRows});
    }
    
    renderItem(item) {
        const clickCallback = () => this.handleRowClick(item.id);
        const itemRows = [
			<tr onClick={clickCallback} key={"row-data-" + item.id}>
			    <td>{item.date}</td>
			    <td>{item.total}</td>
			    <td>{item.status}</td>			
			</tr>
        ];
        
        if(this.state.expandedRows.includes(item.id)) {
            itemRows.push(
                <tr key={"row-expanded-" + item.id}>
                    <td>{item.name}</td>
                    <td>{item.points}</td>
                    <td>{item.percent}</td>
                </tr>
            );
        }
        
        return itemRows;    
    }
    
    render() {
        let allItemRows = [];
        
        this.state.data.forEach(item => {
            const perItemRows = this.renderItem(item);
            allItemRows = allItemRows.concat(perItemRows);
        });
        
        return (
			     <table>{allItemRows}</table>
        );
    }
}