Task scheduling in EJ2 JavaScript Gantt control

24 Jan 202424 minutes to read

The Gantt provides support for automatic and manual task scheduling modes. It is used to indicate whether the start date and end date of all the tasks will be automatically validated or not. taskMode is the property used to change the schedule mode of a task.

The Gantt control supports three types of mode. They are:

  • Auto: All the tasks are automatically validate.
  • Manual: All the tasks are manually validate by the user.
  • Custom: Both Auto and Manual tasks are render by mapped from data source.

Note: The default value of taskMode is Auto.

Automatically scheduled Tasks

When the taskMode property is set as Auto, the start date and end date of all the tasks in the project will be automatically validated. That is, dates are validated based on various factors such as working time, holidays, weekends and predecessors.

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

var gantt = new ej.gantt.Gantt({
     dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        endDate: 'EndDate',
        dependency: 'Predecessor',
        child: 'Children',
    },
    height: '450px',
    taskMode : 'Auto',
    toolbar: ['Add', 'Edit', 'Update', 'Delete', 'Cancel', 'ExpandAll', 'CollapseAll', 'Search'],
    treeColumnIndex: 1,
    editSettings: {
        allowEditing: true,
        allowDeleting: true,
        allowTaskbarEditing: true,
        showDeleteConfirmDialog: true
    },
});
gantt.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
        
        <div id="container">
            <div id="Gantt"></div>        
        </div>   
 


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Manually scheduled Tasks

When the taskMode property is set as Manual, the start date and end date of all the tasks in the project will be same as given in the data source. That is, dates are not validated based on various factors such as dependencies between tasks, holidays, weekends, working time. We can restrict this mode in predecessor validation alone. That is, we can automatically validate the dates based on predecessor values by enabling the validateManualTasksOnLinking property.

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

var gantt = new ej.gantt.Gantt({
     dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        endDate: 'EndDate',
        dependency: 'Predecessor',
        child: 'Children',
    },
    height: '450px',
    taskMode : 'Manual',
    toolbar: ['Add', 'Edit', 'Update', 'Delete', 'Cancel', 'ExpandAll', 'CollapseAll', 'Search'],
    treeColumnIndex: 1,
    editSettings: {
        allowEditing: true,
        allowDeleting: true,
        allowTaskbarEditing: true,
        showDeleteConfirmDialog: true
    },
});
gantt.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
        
        <div id="container">
            <div id="Gantt"></div>        
        </div>   
 


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Custom

When the taskMode property is set as Custom, the scheduling mode for each tasks will be mapped from the data source field. The Boolean property taskFields.manual is used to map the manual scheduling mode field from the data source.

ej.gantt.Gantt.Inject(ej.gantt.Edit,ej.gantt.Toolbar,ej.gantt.Selection);
var GanttData = [
    {
        'TaskID': 1,
        'TaskName': 'Parent Task 1',
        'StartDate': new Date('02/27/2017'),
        'EndDate': new Date('03/03/2017'),
        'Progress': '40',
        'isManual' : true,
        'Children': [
             { 'TaskID': 2, 'TaskName': 'Child Task 1', 'StartDate': new Date('02/27/2017'),
             'EndDate': new Date('03/03/2017'), 'Progress': '40' },
             { 'TaskID': 3, 'TaskName': 'Child Task 2', 'StartDate': new Date('02/26/2017'),
             'EndDate': new Date('03/03/2017'), 'Progress': '40', 'isManual': true },
             { 'TaskID': 4, 'TaskName': 'Child Task 3', 'StartDate': new Date('02/27/2017'),
             'EndDate': new Date('03/03/2017'), 'Duration': 5, 'Progress': '40', }
        ]
    },
    {
        'TaskID': 5,
        'TaskName': 'Parent Task 2',
        'StartDate': new Date('03/05/2017'),
        'EndDate': new Date('03/09/2017'),
        'Progress': '40',
        'isManual': true,
        'Children': [
             { 'TaskID': 6, 'TaskName': 'Child Task 1', 'StartDate': new Date('03/06/2017'),
             'EndDate': new Date('03/09/2017'), 'Progress': '40' },
             { 'TaskID': 7, 'TaskName': 'Child Task 2', 'StartDate': new Date('03/06/2017'),
             'EndDate': new Date('03/09/2017'), 'Progress': '40', },
             { 'TaskID': 8, 'TaskName': 'Child Task 3', 'StartDate': new Date('02/28/2017'),
             'EndDate': new Date('03/05/2017'), 'Progress': '40', 'isManual': true },
             { 'TaskID': 9, 'TaskName': 'Child Task 4', 'StartDate': new Date('03/04/2017'),
             'EndDate': new Date('03/09/2017'), 'Progress': '40', 'isManual': true }
        ]
    },
    {
        'TaskID': 10,
        'TaskName': 'Parent Task 3',
        'StartDate': new Date('03/13/2017'),
        'EndDate': new Date('03/17/2017'),
        'Progress': '40',
        'Children': [
             { 'TaskID': 11, 'TaskName': 'Child Task 1', 'StartDate': new Date('03/13/2017'),
             'EndDate': new Date('03/17/2017'), 'Progress': '40' },
             { 'TaskID': 12, 'TaskName': 'Child Task 2', 'StartDate': new Date('03/13/2017'),
             'EndDate': new Date('03/17/2017'), 'Progress': '40', },
             { 'TaskID': 13, 'TaskName': 'Child Task 3', 'StartDate': new Date('03/13/2017'),
             'EndDate': new Date('03/17/2017'), 'Progress': '40', },
             { 'TaskID': 14, 'TaskName': 'Child Task 4', 'StartDate': new Date('03/12/2017'),
             'EndDate': new Date('03/17/2017'), 'Progress': '40', 'isManual': true },
             { 'TaskID': 15, 'TaskName': 'Child Task 5', 'StartDate': new Date('03/13/2017'),
             'EndDate': new Date('03/17/2017'), 'Progress': '40' }
        ]
    }
];
var gantt = new ej.gantt.Gantt({
    dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        endDate: 'EndDate',
        dependency: 'Predecessor',
        child: 'Children',
        manual: 'isManual',
    },
    height: '450px',
    taskMode : 'Custom',
    toolbar: ['Add', 'Edit', 'Update', 'Delete', 'Cancel', 'ExpandAll', 'CollapseAll', 'Search'],
    columns: [
        { field: 'TaskID', visible: false},
        {field: 'TaskName'},
        { field: 'isManual'}
    ],
    treeColumnIndex: 1,
    editSettings: {
        allowEditing: true,
        allowDeleting: true,
        allowTaskbarEditing: true,
        showDeleteConfirmDialog: true
    },
});
gantt.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
        
        <div id="container">
            <div id="Gantt"></div>        
        </div>   
 


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Unscheduled Tasks

Unscheduled tasks are planned for a project without any definite schedule dates. The Gantt control supports rendering the unscheduled tasks. You can create or update the tasks with anyone of start date, end date, and duration values or none. You can enable or disable the unscheduled tasks by using the allowUnscheduledTasks property. The following images represent the various types of unscheduled tasks in Gantt.

Taskbar state Auto Manual
Start Date Only Alt text Alt text
End Date Only Alt text Alt text
Duration Only Alt text Alt text
Milestone Alt text Alt text

Note: A milestone is a task that has no start and end dates, but it has a duration value of zero

Define unscheduled tasks in data source

You can define the various types of unscheduled tasks in the data source as follows

ej.gantt.Gantt.Inject(ej.gantt.Edit);
var GanttData = [
        {
            TaskID: 1,
            TaskName: 'Project Initiation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			subtasks: [
                { TaskID: 2, TaskName: 'Identify Site location', Duration: 3, Progress: 50},
                { TaskID: 3, TaskName: 'Perform Soil test', StartDate: new Date('04/02/2019'), Progress: 50   },
                { TaskID: 4, TaskName: 'Soil test approval', EndDate: new Date('04/08/2019'), Progress: 50 },
            ]
        },
        {
            TaskID: 5,
            TaskName: 'Project Estimation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			subtasks: [
                { TaskID: 6, TaskName: 'Develop floor plan for estimation', StartDate: new Date('04/04/2019'),EndDate: new Date('04/08/2019'), Progress: 50 },
                { TaskID: 7, TaskName: 'List materials', StartDate: new Date('04/04/2019'), Progress: 50  },
                { TaskID: 8, TaskName: 'Estimation approval',Duration: 0,Progress: 50}
            ]
        },
    ];
var ganttChart = new ej.gantt.Gantt({
        dataSource: GanttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			endDate:'EndDate',
			duration:'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		editSettings: {
		   allowEditing:true,
		   allowTaskbarEditing:true
        },
		allowUnscheduledTasks:true
    });
ganttChart.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    
    <div id="container">
        <div id="Gantt"></div>        
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

NOTE
If the allowUnscheduledTasks property is set to false, then the Gantt control automatically calculates the scheduled date values with a default value of duration 1 and the project start date is considered as the start date for the task.

Working time range

In the Gantt control, working hours in a day for a project can be defined by using the dayWorkingTime property. Based on the working hours, automatic date scheduling and duration validations for a task are performed.

The following code snippet explains how to define the working time range for the project in Gantt.

ej.gantt.Gantt.Inject(ej.gantt.DayMarkers);

var ganttChart = new ej.gantt.Gantt({
        dataSource: GanttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		highlightWeekends:true,
		 dayWorkingTime: [
            {from: 9, 
		     to: 18 }
       ],
	   timelineSettings:{
		   timelineViewMode:'Day'
	   },
	   splitterSettings:{
		   columnIndex:0
	   }
});
ganttChart.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    
    <div id="container">
        <div id="Gantt"></div>        
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

NOTE

  • Individual tasks can lie between any time within the defined working time range of the project.
  • The dayWorkingTime property is used to define the working time for the whole project.

Weekend/non-working days

Non-working days/weekend are used to represent the non-productive days in a project. You can define the non-working days in a week using the workWeek property in Gantt.

var ganttData = [
        {
            TaskID: 1,
            TaskName: 'Project Initiation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 2, TaskName: 'Identify Site location', StartDate: new Date('04/02/2019'), Duration: 3, Progress: 50,isParent:false },
                { TaskID: 3, TaskName: 'Perform Soil test', StartDate: new Date('04/02/2019'), Duration: 3, Progress: 70, resources: [2, 3, 5],isParent:false   },
                { TaskID: 4, TaskName: 'Soil test approval', StartDate: new Date('04/02/2019'), Duration: 3, Predecessor:"2FS", Progress: 80,isParent:false  },
            ]
        },
        {
            TaskID: 5,
            TaskName: 'Project Estimation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 6, TaskName: 'Develop floor plan for estimation', StartDate: new Date('04/04/2019'), Duration: 4, Progress: 50, resources: [4],isParent:false  },
                { TaskID: 7, TaskName: 'List materials', StartDate: new Date('04/04/2019'), Duration: 4, Progress: 50, DurationUnit:'day', resources: [4, 8],isParent:false  },
                { TaskID: 8, TaskName: 'Estimation approval', StartDate: new Date('04/04/2019'), Duration: 4,Predecessor:"6SS", DurationUnit:'minute', Progress: 70, resources: [12, 5],isParent:false  }
            ]
        },
    ];
var ganttChart = new ej.gantt.Gantt({
        dataSource: ganttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
	    workWeek: ["Sunday","Monday","Tuesday","Wednesday","Thursday"],
		highlightWeekends:true
});
ganttChart.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    
    <div id="container">
        <div id="Gantt"></div>        
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

By default, Saturdays and Sundays are considered as non-working days/weekend in a project.
In the Gantt control, you can make weekend as working day by setting the includeWeekend property to true.

Duration units

In Gantt, the task’s duration value can be measured by the following duration units,

  • Day
  • Hour
  • Minute

In Gantt, we can define duration unit for whole project by using durationUnit property, when we defines the value for this property, this unit will be applied for all task which don’t has duration unit value. And each task in the project can be defined with different duration units and the duration unit of a task can be defined by the following ways,

  • Using taskFields.durationUnit property, to map the duration unit data source field.
  • Defining the duration unit value along with the duration field in the data source.

Mapping the duration unit field

The below code snippet explains the mapping of duration unit data source field to the Gantt control using the taskFields.durationUnit property.

var ganttData = [
        {
            TaskID: 1,
            TaskName: 'Project Initiation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			subtasks: [
                { TaskID: 2, TaskName: 'Identify Site location', StartDate: new Date('04/02/2019'), Duration: 2, DurationUnit:'day', Progress: 50 },
                { TaskID: 3, TaskName: 'Perform Soil test', StartDate: new Date('04/02/2019'), Duration: 12,DurationUnit:'hour', Progress: 70  },
                { TaskID: 4, TaskName: 'Soil test approval', StartDate: new Date('04/02/2019'), Duration: 240,DurationUnit:'minute', Progress: 80 },
            ]
        },
        {
            TaskID: 5,
            TaskName: 'Project Estimation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			subtasks: [
                { TaskID: 6, TaskName: 'Develop floor plan for estimation', StartDate: new Date('04/04/2019'), Duration: 3, DurationUnit:'hour', Progress: 50  },
                { TaskID: 7, TaskName: 'List materials', StartDate: new Date('04/04/2019'), Duration: 3, Progress: 50, DurationUnit:'day' },
                { TaskID: 8, TaskName: 'Estimation approval', StartDate: new Date('04/04/2019'), Duration: 480, DurationUnit:'minute', Progress: 70 }
            ]
        },
    ];
var ganttChart = new ej.gantt.Gantt({
        dataSource: ganttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			durationUnit:'DurationUnit',
			child: 'subtasks'
        },
		splitterSettings:{
			columnIndex:4
		}
		
});
ganttChart.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="Gantt"></div>        
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

NOTE
The default value of the durationUnit property is day.

Defining duration unit along with duration field

Duration units for the tasks can also be defined along with the duration values, the below code snippet explains the duration unit for a task along with duration value,

var ganttData = [
        {
            TaskID: 1,
            TaskName: 'Project Initiation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 2, TaskName: 'Identify Site location', StartDate: new Date('04/02/2019'), Duration: '3days', Progress: 50 },
                { TaskID: 3, TaskName: 'Perform Soil test', StartDate: new Date('04/02/2019'), Duration: '12hours', Progress: 70   },
                { TaskID: 4, TaskName: 'Soil test approval', StartDate: new Date('04/02/2019'), Duration: '1800minutes', Progress: 80  },
            ]
        },
        {
            TaskID: 5,
            TaskName: 'Project Estimation',
            StartDate: new Date('04/02/2019'),
            EndDate: new Date('04/21/2019'),
			isParent:true,
            subtasks: [
                { TaskID: 6, TaskName: 'Develop floor plan for estimation', StartDate: new Date('04/04/2019'), Duration: '12hours',Progress: 50 },
                { TaskID: 7, TaskName: 'List materials', StartDate: new Date('04/04/2019'), Duration: '3days', Progress: 50 },
                { TaskID: 8, TaskName: 'Estimation approval', StartDate: new Date('04/04/2019'), Duration: '480minutes', Progress: 70  }
            ]
        },
    ];
var ganttChart = new ej.gantt.Gantt({
        dataSource: ganttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		splitterSettings:{
			columnIndex:4
		}
		
});
ganttChart.appendTo('#Gantt');
<!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://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="Gantt"></div>        
    </div>


<script>
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NOTE:
The edit type of the duration column in Gantt is string, to support editing the duration field along with duration units.