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Leaf Item in JavaScript TreeMap control

22 Oct 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
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index.ts
index.html
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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',
            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://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>

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.ts
index.html
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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',
            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://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>

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.ts
index.html
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import { TreeMap } from '@syncfusion/ej2-treemap';
let treemap: TreeMap = new 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'
        },
}, '#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://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>

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.ts
index.html
Copied to clipboard
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',
            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://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>