The TreeMap control supports data binding using the dataSource property.
The dataSource property accepts collection values as input. For example, a list of objects can be provided as input. Data can be given as either flat or hierarchical collection to the dataSource property.
The following code shows, how to bind a flat collection as data source to the TreeMap control.
import { TreeMap } from '@syncfusion/ej2-treemap';
let treemap: TreeMap = new TreeMap({
dataSource: [
{State:"United States", GDP:17946, percentage:11.08, Rank:1},
{State:"China", GDP:10866, percentage: 28.42, Rank:2},
{State:"Japan", GDP:4123, percentage:-30.78, Rank:3},
{State:"Germany", GDP:3355, percentage:-5.19, Rank:4},
{State:"United Kingdom", GDP:2848, percentage:8.28, Rank:5},
{State:"France", GDP:2421, percentage:-9.69, Rank:6},
{State:"India", GDP:2073, percentage:13.65, Rank:7},
{State:"Italy", GDP:1814, percentage:-12.45, Rank:8},
{State:"Brazil", GDP:1774, percentage:-27.88, Rank:9},
{State:"Canada", GDP:1550, percentage:-15.02, Rank:10}
],
weightValuePath: 'GDP',
leafItemSettings: {
labelPath: 'State'
},
}, '#container');<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 for Treemap </title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for treemap UI Control" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
</head>
<body>
<div id='loader'>Loading....</div>
<div id='container'>
</div>
</body>
</html>The following code shows, how to bind a hierarchical collection as data source to the TreeMap control.
import { TreeMap } from '@syncfusion/ej2-treemap';
let treemap: TreeMap = new TreeMap({
dataSource: [{
"Continent": [{
"Name": "Africa",
"Population": 1216130000,
"States": [{
"Name": "Eastern Africa",
"Population": 410637987,
"Region": [{
"Name": "Ethiopia",
"Population": 107534882
}]
},
{
"Name": "Middle Africa",
"Population": 158562976,
"Region": [{
"Name": "Democratic, Republic of the Congo",
"Population": 84004989
}]
}
]
}]
},
{
"Continent": [{
"Name": "Asia",
"Population": 4436224000,
"States": [{
"Name": "Central Asia",
"Population": 69787760,
"Region": [{
"Name": "Uzbekistan",
"Population": 32364996
}]
},
{
"Name": "Eastern Asia",
"Population": 1641908531,
"Region": [{
"Name": "China",
"Population": 1415045928
}]
}
]
}]
},
{
"Continent": [{
"Name": "North America",
"Population": 579024000,
"States": [{
"Name": "Central America",
"Population": 174988756,
"Region": [{
"Name": "Mexico",
"Population": 130759074
}]
},
{
"Name": "Northern America",
"Population": 358593810,
"Region": [{
"Name": "U.S.",
"Population": 3267667480
}]
}
]
}]
},
{
"Continent": [{
"Name": "South America",
"Population": 422535000,
"States": [{
"Name": "Brazil",
"Population": 204519000
}]
}]
},
{
"Continent": [{
"Name": "Europe",
"Population": 738849000,
"States": [{
"Name": "Eastern Europe",
"Population": 291953328,
"Region": [{
"Name": "Russia",
"Population": 143964709
}]
},
{
"Name": "Northern Europe",
"Population": 103642971,
"Region": [{
"Name": "United Kingdom",
"Population": 66573504
}]
}
]
}]
}
],
weightValuePath: 'Population',
leafItemSettings: {
labelPath: 'Name',
fill:'#0077b3',
border: { color: 'black', width: 0.5 }
},
levels: [
{ groupPath: 'Continent',fill:'#004466', border: { color: 'black', width: 0.5 } },
{ groupPath: 'States', fill:'#0099e6', border: { color: 'black', width: 0.5 } },
]
}, '#container');<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 for Treemap </title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for treemap UI Control" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
</head>
<body>
<div id='loader'>Loading....</div>
<div id='container'>
</div>
</body>
</html>