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    Tree Map

    Plain Data Structure

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    In this demo, the TreeMap component accepts a data source of a plain structure.

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    window.onload = function () { const viewModel = { treeMapOptions: { dataSource: citiesPopulation, title: 'The Most Populated Cities by Continents', idField: 'id', parentField: 'parentId', tooltip: { enabled: true, format: 'thousands', customizeTooltip(arg) { const { data } = arg.node; let result = null; if (arg.node.isLeaf()) { result = `<span class='city'>${data.name}</span> (${ data.country})<br/>Population: ${arg.valueText}`; } return { text: result, }; }, }, }, }; ko.applyBindings(viewModel, document.getElementById('treemap-demo')); };
    <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.7/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.7/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.2.7/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="treemap-demo"> <div id="treemap" data-bind="dxTreeMap: treeMapOptions"></div> </div> </div> </body> </html>
    #treemap { height: 500px; } .city { font-weight: 500; }
    const citiesPopulation = [{ id: '1', name: 'Africa', }, { id: '1_1', parentId: '1', value: 21324000, name: 'Lagos', country: 'Nigeria', }, { id: '1_2', parentId: '1', value: 9735000, name: 'Kinshasa', country: 'Democratic Republic of the Congo', }, { id: '1_3', parentId: '1', value: 9278441, name: 'Cairo', country: 'Egypt', }, { id: '2', name: 'Asia', }, { id: '2_1', parentId: '2', value: 24256800, name: 'Shanghai', country: 'China', }, { id: '2_2', parentId: '2', value: 23500000, name: 'Karachi', country: 'Pakistan', }, { id: '2_3', parentId: '2', value: 21516000, name: 'Beijing', country: 'China', }, { id: '2_4', parentId: '2', value: 16787941, name: 'Delhi', country: 'India', }, { id: '2_5', parentId: '2', value: 15200000, name: 'Tianjin', country: 'China', }, { id: '3', name: 'Australia', }, { id: '3_1', parentId: '3', value: 4840600, name: 'Sydney', country: 'Austraila', }, { id: '3_2', parentId: '3', value: 4440000, name: 'Melbourne', country: 'Austraila', }, { id: '4', name: 'Europe', }, { id: '4_1', parentId: '4', value: 14160467, name: 'Istanbul', country: 'Turkey', }, { id: '4_2', parentId: '4', value: 12197596, name: 'Moscow', country: 'Russia', }, { id: '4_3', parentId: '4', value: 8538689, name: 'London', country: 'United Kingdom', }, { id: '4_4', parentId: '4', value: 5191690, name: 'Saint Petersburg', country: 'Russia', }, { id: '4_5', parentId: '4', value: 4470800, name: 'Ankara', country: 'Turkey', }, { id: '4_6', parentId: '4', value: 3517424, name: 'Berlin', country: 'Germany', }, { id: '5', name: 'North America', }, { id: '5_1', parentId: '5', value: 8874724, name: 'Mexico City', country: 'Mexico', }, { id: '5_2', parentId: '5', value: 8550405, name: 'New York City', country: 'United States', }, { id: '5_3', parentId: '5', value: 3884307, name: 'Los Angeles', country: 'United States', }, { id: '5_4', parentId: '5', value: 2808503, name: 'Toronto', country: 'Canada', }, { id: '6', name: 'South America', }, { id: '6_1', parentId: '6', value: 11895893, name: 'São Paulo', country: 'Brazil', }, { id: '6_2', parentId: '6', value: 8693387, name: 'Lima', country: 'Peru', }, { id: '6_3', parentId: '6', value: 7776845, name: 'Bogotá', country: 'Colombia', }, { id: '6_4', parentId: '6', value: 6429923, name: 'Rio de Janeiro', country: 'Brazil', }];