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Copy and Paste records in JavaScript Gantt control

You can copy and paste a record in the Gantt chart by using the addRecord method and custom context menu. It is also possible to copy and paste the parent record with multiple hierarchical child records on the required position.

Source
Preview
index.ts
index.html
import { Gantt, Edit, Selection, ContextMenu } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Edit, Selection, ContextMenu);

var copiedRecord: any;
var enableFlag: any;

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        dependency:'Predecessor',
        child: 'subtasks'
    },
    editSettings: {
        allowAdding: true,
        allowEditing: true,
        allowDeleting: true,
        allowTaskbarEditing: true
    },
    toolbar: ['Add', 'Edit', 'Update', 'Delete', 'Cancel', 'ExpandAll', 'CollapseAll'],
    allowSelection: true,
    enableContextMenu: true,
    contextMenuItems: [
        { text: 'Copy', target: '.e-content', id: 'copy' },
        { text: 'Paste', target: '.e-content', id: 'paste' },
    ],
    contextMenuClick: function (args) {
        if (args.item.id === 'copy') {
            copiedRecord = args.rowData;
            copiedRecord.taskData.TaskID = gantt.currentViewData.length + 1;
        }
        if (args.item.id === 'paste') {
            gantt.addRecord(copiedRecord.taskData,'Below',args.rowData.index);
            if(copiedRecord.hasChildRecords) {
                addChildRecords(copiedRecord, args.rowData.index + 1);
            }
            copiedRecord = undefined;
        }
    },
    contextMenuOpen: function (args) {
        if (args.type !== 'Header') {
            if (copiedRecord) {
                args.hideItems.push('Copy');
            } else {
                args.hideItems.push('Paste');
             }
        }
    },
});

gantt.appendTo('#Gantt');

function addChildRecords(record: any, index: any) {
    for(var i=0; i<record.childRecords.length; i++) {
          var childRecord = record.childRecords[i];
          childRecord.taskData.TaskID = gantt.currentViewData.length + 1;
          gantt.addRecord(childRecord.taskData,'Child',index);
          if(childRecord.hasChildRecords) {
              addChildRecords(childRecord, index + (i+1));
          }
    }
  }
<!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/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'>	   
        <div id='Gantt'></div>        
    </div>
</body>

</html>