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Indent and Outdent in JavaScript Gantt control

02 Dec 2022 / 2 minutes to read

Indent and Outdent of a task are used to update the level of task in the hierarchical order of the task. It can be performed by enabling the editSettings.allowEditing property.

Indent - Selected task can be indented to the level of task to the hierarchical order. It can be performed by using in-built context menu or toolbar items. It can also be invoked by using the indent method dynamically on any action like external button click. The following code example shows how to enable indent option in the Gantt chart.

Outdent - Selected task can be outdented to the level of task from the hierarchical order. It can be performed by using in-built context menu or toolbar items. It can also be invoked by using the outdent method dynamically on any action like external button click. The following code example shows how to enable outdent option in the Gantt chart.

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index.ts
index.html
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import { Gantt, Toolbar, Edit, Selection, Toolbar } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Toolbar, Edit, Selection, Toolbar);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    toolbar: ['Indent', 'Outdent'],
    editSettings: {
        allowEditing: true
    }
});
gantt.appendTo('#Gantt');

let ind: Button = new Button();
ind.appendTo('#indent');
let out: Button = new Button();
out.appendTo('#outdent');
document.getElementById('indent').addEventListener('click', () => {
   gantt.indent();
});
document.getElementById('outdent').addEventListener('click', () => {
   gantt.outdent();
});
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<!DOCTYPE html>
<html lang="en">

<head>
     <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <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'>
	   <button id="indent">Indent</button>
       <button id="outdent">Outdent</button>
        <div id='Gantt'></div>
    </div>
</body>

</html>