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Template in JavaScript TreeView control

08 Apr 2021 / 2 minutes to read

The TreeView component allows you to customize the look of TreeView nodes by using the nodeTemplate property. This property accepts either template string or HTML element ID.

In the following sample, employee information such as employee photo, name, and designation have been included using the nodeTemplate property.

The template expression should be provided inside the ${...} interpolation syntax.

Source
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index.ts
index.html
index.css
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import { enableRipple } from '@syncfusion/ej2-base';
enableRipple(true);
import { TreeView } from '@syncfusion/ej2-navigations';

let employees: { [key: string]: Object }[] = [
    { id: 1, name: 'Steven Buchanan', eimg: '10', job: 'CEO', hasChild: true, expanded: true },
    { id: 2, pid: 1, name: 'Laura Callahan', eimg: '2', job: 'Product Manager', hasChild: true },
    { id: 3, pid: 2, name: 'Andrew Fuller', eimg: '7', job: 'Team Lead', hasChild: true },
    { id: 4, pid: 3, name: 'Anne Dodsworth', eimg: '1', job: 'Developer' },
    { id: 5, pid: 1, name: 'Nancy Davolio', eimg: '4', job: 'Product Manager', hasChild: true },
    { id: 6, pid: 5, name: 'Michael Suyama', eimg: '9', job: 'Team Lead', hasChild: true },
    { id: 7, pid: 6, name: 'Robert King', eimg: '8', job: 'Developer ' },
    { id: 8, pid: 7, name: 'Margaret Peacock', eimg: '6', job: 'Developer' },
    { id: 9, pid: 1, name: 'Janet Leverling', eimg: '3', job: 'HR' },
];

let treeObj: TreeView = new TreeView({
    fields: { dataSource: employees, id: 'id', parentID: 'pid', text: 'name', hasChildren: 'hasChild' },
    cssClass: 'custom',
    nodeTemplate: '#treeTemplate'
});
treeObj.appendTo('#tree');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 for TreeView </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for TreeView UI Control" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.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 id='treeparent'>
            <div id="tree"></div>
        </div>
    </div>
    <script id="treeTemplate" type="text/x-template">
        <div>
            <img class="eimage" src= "https://ej2.syncfusion.com/demos/src/treeview/images/employees/${eimg}.png" alt="${eimg}" />
            <div class="ename">${name}</div>
            <div class="ejob">${job}</div>
        </div>
    </script>
</body>

</html>
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#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  height: 40px;
  width: 30%;
  position: absolute;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  top: 45%;
  left: 45%;
}

#treeparent {
    display: block;
    max-width: 450px;
    max-height: 350px;
    margin: auto;
    overflow: auto;
    border: 1px solid #dddddd;
    border-radius: 3px;
}

.custom .e-list-item .e-fullrow {
    height: 72px;
}

.custom .e-list-item .e-list-text {
    line-height: normal;
}

.eimage {
    float: left;
    padding: 11px 16px 11px 0;
}

.ename {
    font-size: 16px;
    padding: 14px 0 0;
}

.ejob {
    font-size: 14px;
    opacity: .87;
}

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