jqwidgets-scripts-custom/demos/React/app/grid/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 JqxGrid from '../../../jqwidgets-react/react_jqxgrid.js';

class App extends React.Component {
    render() {
        let source =
            {
                localdata: generatedata(200),
                datatype: 'array',
                datafields:
                [
                    { name: 'firstname', type: 'string' },
                    { name: 'lastname', type: 'string' },
                    { name: 'productname', type: 'string' },
                    { name: 'available', type: 'bool' },
                    { name: 'quantity', type: 'number' },
                    { name: 'price', type: 'number' }
                ],
                updaterow: (rowid, rowdata) => {
                    // synchronize with the server - send update command   
                }
            };

        let dataAdapter = new $.jqx.dataAdapter(source);


        let columns =
            [
                { text: 'First Name', columntype: 'textbox', datafield: 'firstname', width: 170 },
                { text: 'Last Name', datafield: 'lastname', columntype: 'textbox', width: 170 },
                {
                    text: 'Product', datafield: 'productname', width: 170,
                    aggregates: ['count',
                        {
                            'Cappuccino Items':
                            (aggregatedValue, currentValue) => {
                                if (currentValue == 'Cappuccino') {
                                    return aggregatedValue + 1;
                                }
                                return aggregatedValue;
                            }
                        }
                    ]
                },
                {
                    text: 'In Stock', datafield: 'available', columntype: 'checkbox', width: 125,
                    aggregates: [{
                        'In Stock':
                        (aggregatedValue, currentValue) => {
                            if (currentValue) {
                                return aggregatedValue + 1;
                            }
                            return aggregatedValue;
                        }
                    },
                    {
                        'Not In Stock':
                        (aggregatedValue, currentValue) => {
                            if (!currentValue) {
                                return aggregatedValue + 1;
                            }
                            return aggregatedValue;
                        }
                    }
                    ]
                },
                {
                    text: 'Quantity', datafield: 'quantity', width: 85, cellsalign: 'right', cellsformat: 'n2', aggregates: ['min', 'max'],
                    aggregatesrenderer: (aggregates) => {
                        let renderstring = '';
                        $.each(aggregates, (key, value) => {
                            let name = key == 'min' ? 'Min' : 'Max';
                            renderstring += '<div style="position: relative; margin: 4px; overflow: hidden;">' + name + ': ' + value + '</div>';
                        });
                        return renderstring;
                    }
                },
                { text: 'Price', datafield: 'price', cellsalign: 'right', cellsformat: 'c2', aggregates: ['sum', 'avg'] }
            ];

        return (
            <JqxGrid
                width={850} source={dataAdapter} showstatusbar={true}
                editable={true} showaggregates={true} statusbarheight={50}
                columns={columns} selectionmode={'singlecell'}
            />
        )
    }
}

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