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Top Tier and Bottom Tier in JavaScript (ES5) Gantt control

02 Dec 2022 / 3 minutes to read

Gantt control contains two tier layout in timeline, we can customize the top tier and bottom tier using topTier and bottomTier properties. Timeline tier’s unit can be defined by using unit property and format property was used to define date format of timeline cell and count property was used to define how many unit will be combined as single cell and formatter property was used to define custom method to format the date value of timeline cell.

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index.js
index.html
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var ganttChart = new ej.gantt.Gantt({
        dataSource: GanttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		timelineSettings: {
		    topTier: {
                    format: 'MMM',
                    unit: 'Month'
                },
                    bottomTier: {
                    unit: 'Day'
				}
		}
});
ganttChart.appendTo('#Gantt');
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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://cdn.syncfusion.com/ej2/20.3.56/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.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>

Combining timeline cells

In Gantt, timeline cells in top tier and bottom tier can be combined with number of timeline units, this can be acheived by using topTier.count and bottomTier.count properties. Please refer the below sample.

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index.js
index.html
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var ganttChart = new ej.gantt.Gantt({
        dataSource: Data,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		timelineSettings: {
			timelineUnitSize:100,
		    topTier: {
                   unit: 'Year'
                },
                    bottomTier: {
                    unit: 'Month',
					count:6
                }
		}
});
ganttChart.appendTo('#Gantt');
Copied to clipboard
<!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://cdn.syncfusion.com/ej2/20.3.56/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.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>

Format value of timeline cell

In the Gantt control, you can format the value of top and bottom timeline cells using the standard date format string or the custom formatter method. This can be done using the topTier.format, topTier.formatter, bottomTier.format and bottomTier.formatter properties. The following example shows how to use the formatter method for timeline cells.

Source
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index.js
index.html
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var ganttChart = new ej.gantt.Gantt({
        dataSource: Data,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		timelineSettings: {
			topTier: {
            unit: 'Month',
            count: 3,
            formatter: (date) => {
                var month = date.getMonth();
                if (month >= 0 && month <=2) {
                return 'Q1';
                } else if(month >= 3 && month <=5) {
                    return 'Q2';
                } else if(month >= 6 && month <=8) {
                    return 'Q3';
                } else {
                    return 'Q4';
                }
            }
	    },
	    bottomTier: {
            unit: 'Month',
            format: 'MMM'
          }
		},
		projectStartDate:new Date('01/04/2019'),
		projectEndDate:new Date('12/30/2019')
});
ganttChart.appendTo('#Gantt');
Copied to clipboard
<!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://cdn.syncfusion.com/ej2/20.3.56/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.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>

Timeline cell width

In the Gantt control, you can define the width value of timeline cell using the timelineSettings.timelineUnitSize property. This value will be set to the bottom timeline cell, and the width value of top timeline cell will be calculated automatically based on bottom tier cell width using the topTier.unit and timelineSettings.timelineUnitSize properties. Refer to the following example.

Source
Preview
index.js
index.html
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var ganttChart = new ej.gantt.Gantt({
        dataSource: GanttData,
		height:'450px',
		taskFields: {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
			duration: 'Duration',
            progress: 'Progress',
			child: 'subtasks'
        },
		timelineSettings: {
            timelineUnitSize:200
        }
});
ganttChart.appendTo('#Gantt');
Copied to clipboard
<!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://cdn.syncfusion.com/ej2/20.3.56/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.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>