jqwidgets-scripts-custom/demos/React/app/treegrid/aggregates/app.js

jQWidgets is an advanced jQuery, Angular 7, Vue, React, ASP .NET MVC, Custom Elements and HTML5 UI framework.

import React from 'react';
import ReactDOM from 'react-dom';

import JqxTreeGrid from '../../../jqwidgets-react/react_jqxtreegrid.js';

class App extends React.Component {
    componentDidMount() {
        setTimeout(() => {
            this.refs.myTreeGrid.expandRow(34);
        })
    }
    render () {
        // prepare the data
        let source = {
            dataType: 'tab',
            dataFields: [
                { name: 'Id', type: 'number' },
                { name: 'Name', type: 'string' },
                { name: 'ParentID', type: 'number' },
                { name: 'Population', type: 'number' }
            ],
            hierarchy:
            {
                keyDataField: { name: 'Id' },
                parentDataField: { name: 'ParentID' }
            },
            id: 'Id',
            url: '../sampledata/locations.tsv'
        };
        let dataAdapter = new $.jqx.dataAdapter(source);
        // create Tree Grid
        let columns = [
            { text: 'Location Name', dataField: 'Name', align: 'center', width: '50%' },
            { text: 'Population', dataField: 'Population', align: 'center', width: '50%', aggregates: ['min', 'max', 'count'] }
        ];
        return (
            <JqxTreeGrid ref='myTreeGrid'
                width={850}
                height={400}
                source={dataAdapter}
                pageable={true}
                pageSize={25}
                showAggregates={true}
                showSubAggregates={true}
                aggregatesHeight={70}
                sortable={true}
                columns={columns}
            />
        )
    }
}

ReactDOM.render(<App />, document.getElementById('app'));