Data Label in EJ2 JavaScript 3D Circular Chart control

19 Mar 202424 minutes to read

A data label refers to a label associated with specific data points. It can be added to a 3D Circular Chart series by enabling the visible option in the dataLabel property. By default, the labels will arrange themselves smartly to avoid overlapping.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13 }, 
                { x: 'Feb', y: 13.5 },
                { x: 'Mar', y: 7 }, 
                { x: 'Apr', y: 13.5 }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

To use the data label feature, inject the CircularChartDataLabel3D using the CircularChart3D.Inject(CircularChartDataLabel3D method.

Positioning

Using the position property, we can place the data label either inside or outside the 3D Circular Chart.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13 }, 
                { x: 'Feb', y: 13 },
                { x: 'Mar', y: 17 }, 
                { x: 'Apr', y: 13.5 }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                position: 'Outside'
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Data label template

The label content can be formatted using the template option. Inside the template, placeholder text ${point.x} and ${point.y can be added to display the corresponding data point’s x & y value. The data label template can be set using the template property.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13, text: 'Jan: 13' }, 
                { x: 'Feb', y: 13, text: 'Feb: 13' },
                { x: 'Mar', y: 17, text: 'Mar: 17' }, 
                { x: 'Apr', y: 13.5, text: 'Apr: 13.5' }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                name: 'text',
                template:  "<div id='templateWrap' style='background-color:#bd18f9;border-radius: 3px; float: right;padding: 2px;line-height: 20px;text-align: center;'>"+ "<img src='https://ej2.syncfusion.com/demos/src/chart/images/sunny.png' />" + "<div style='color:white; font-family:Roboto; font-style: medium; fontp-size:14px;float: right;padding: 2px;line-height: 20px;text-align: center;padding-right:6px'><span>${point.y}</span></div></div>"
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Connector line

The connector line will be visible when the data label is placed outside the chart. It can be customized using properties such as color, width, length, and dashArray within the connectorStyle property.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13, text: 'Jan: 13' }, 
                { x: 'Feb', y: 13, text: 'Feb: 13' },
                { x: 'Mar', y: 17, text: 'Mar: 17' }, 
                { x: 'Apr', y: 13.5, text: 'Apr: 13.5' }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                name: 'text',
                position: 'Outside',
                connectorStyle: {
                    length: '50px',
                    width: 2,                  
                    color: '#f4429e',
                    dashArray: '5,3'
                }
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Text mapping

Text from the data source can be mapped using the name property within the data label.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 3, text:'January' }, 
                { x: 'Feb', y: 3.5, text: 'February' },
                { x: 'Mar', y: 7, text: 'March' }, 
                { x: 'Apr', y: 13.5, text: 'April' }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                name: 'text'
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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

The data label for the 3D Circular Chart can be formatted using the format property. You can utilize global formatting options such as ‘n’, ‘p’, and ‘c’.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13 },
                { x: 'Feb', y: 13 },
                { x: 'Mar', y: 7 },
                { x: 'Apr', y: 13 }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                format: 'n2'
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Value Format Resultant Value Description
1000 n1 1000.0 The number is rounded to 1 decimal place.
1000 n2 1000.00 The number is rounded to 2 decimal places.
1000 n3 1000.000 The number is rounded to 3 decimal place.
0.01 p1 1.0% The number is converted to percentage with 1 decimal place.
0.01 p2 1.00% The number is converted to percentage with 2 decimal place.
0.01 p3 1.000% The number is converted to percentage with 3 decimal place.
1000 c1 $1000.0 The currency symbol is appended to number and number is rounded to 1 decimal place.
1000 c2 $1000.00 The currency symbol is appended to number and number is rounded to 2 decimal place.

Customization

Individual text for the data points in the 3D Circular Chart can be customized using the textRender event.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13, text: 'Jan: 13' }, 
                { x: 'Feb', y: 13, text: 'Feb: 13' },
                { x: 'Mar', y: 17, text: 'Mar: 17' }, 
                { x: 'Apr', y: 13.5, text: 'Apr: 13.5' }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                name: 'text',
                position: 'Outside'
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    },
    textRender: (args) => {
        if (args.text.indexOf('Mar') > -1) {
            args.color = 'red';
            args.border.width = 1;
        }
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Using textRender event

You can customize the data label of a pie chart using the textRender event as follows to show the percentage.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13 }, 
                { x: 'Feb', y: 13.5 },
                { x: 'Mar', y: 7 }, 
                { x: 'Apr', y: 13.5 }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    },
    textRender: (args) => {
        args.text = args.point.percentage + "%";
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>

Using template

You can display the percentage values in the data label of a pie chart using the template option.

var circularchart = new ej.charts.CircularChart3D({
    series: [
        {
            dataSource: [
                { x: 'Jan', y: 13 }, 
                { x: 'Feb', y: 13.5 },
                { x: 'Mar', y: 7 }, 
                { x: 'Apr', y: 13.5 }
            ],
            xName: 'x',
            yName: 'y',
            dataLabel: {
                visible: true,
                template: "<div id='dataLabelTemplate'>${point.percentage}%</div>"
            }
        }
    ],
    tilt: -45,
    legendSettings: {
        visible: false
    }
}, '#element');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/29.2.4/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="element"></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>