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Leaf Item in JavaScript (ES5) TreeMap control

26 Nov 2021 / 4 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.

Source
Preview
index.js
index.html
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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');
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<!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/dist/ej2.min.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.

Source
Preview
index.js
index.html
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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');
Copied to clipboard
<!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/dist/ej2.min.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.

Source
Preview
index.js
index.html
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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;">{{:Sport}} - {{:Gold}}</div>'
    }
}, '#container');
Copied to clipboard
<!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/dist/ej2.min.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.

Source
Preview
index.js
index.html
Copied to clipboard
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');
Copied to clipboard
<!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/dist/ej2.min.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>