Leaf item in EJ2 JavaScript Treemap control

19 Apr 202315 minutes to read

A leaf item defines a visualized data element and does not contain child nodes but contains parent node if the levels are specified in the TreeMap.

Leaf label

Label is represented by item name or value. Label will be appeared by specifying the labelPath property and customize the label style using the labelStyle property.

var treemap = new ej.treemap.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',
        labelStyle: {
            color: '#000000'
        },
        border: {
            color: '#000000',
            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://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Label position and format

Positioning the leaf item label using the labelPosition property and the text format can be customized by specifying data source properties name in the labelFormat property.

var treemap = new ej.treemap.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',
        labelPosition:'TopCenter',
        labelFormat: '${State}<br>$${GDP} Trillion<br>(${percentage} %)',
    }
}, '#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://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Label template and position

Specifies the template of leaf item label and position of the template to be customized using labelTemplate and templatePosition properties.

var treemap = new ej.treemap.TreeMap({
    dataSource: [
        { Sport: "Swimming", Gold: 16, GameImage: 'Swimming.svg', ItemHeight: "180px", ItemWidth: '180px' },
        { Sport: "Athletics", Gold: 13, GameImage: 'Athletics.svg', ItemHeight: "70px", ItemWidth: '70px' },
        { Sport: "Gymnastics", Gold: 4, GameImage: 'Gymnastics.svg', ItemHeight: "80px", ItemWidth: '80px' },
        { Sport: "Cycling", Gold: 2, GameImage: 'Cycling.svg', ItemHeight: "50px", ItemWidth: '50px' },
        { Sport: "Wrestling", Gold: 2, GameImage: 'Wrestling.svg', ItemHeight: "60px", ItemWidth: '50px' },
        { Sport: "Basketball", Gold: 2, GameImage: 'Basketball.svg', ItemHeight: "50px", ItemWidth: '50px' },
        { Sport: "Boxing", Gold: 1, GameImage: 'Boxing.svg', ItemHeight: "40px", ItemWidth: '30px' },
        { Sport: "Tennis", Gold: 1, GameImage: 'Tennis.svg', ItemHeight: "40px", ItemWidth: '40px' },
        { Sport: "Judo", Gold: 1, GameImage: 'Judo.svg', ItemHeight: "40px", ItemWidth: '40px' },
        { Sport: "Rowing", Gold: 1, GameImage: 'Rowing.svg', ItemHeight: "40px", ItemWidth: '40px' },
        { Sport: "Shooting", Gold: 1, GameImage: 'Shooting.svg', ItemHeight: "40px", ItemWidth: '40px' },
        { Sport: "Triathlon", Gold: 1, GameImage: 'Triathlon.svg', ItemHeight: "40px", ItemWidth: '40px' },
        { Sport: "Water polo", Gold: 1, GameImage: 'Water polo.svg', ItemHeight: "40px", ItemWidth: '40px' }
    ],
    weightValuePath: 'Gold',
    leafItemSettings: {
    labelPath: 'Sport',
        fill: '#993399',
        templatePosition: 'Center',
        labelTemplate: '<div style="pointer-events: none;"> - </div>'
    }
}, '#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://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Item gap

The gap property is used to separate an item from another item. Each item rectangle is split into equal space with specified gap.

var treemap = new ej.treemap.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',
        gap:20
    }
}, '#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://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>