User interaction in EJ2 TypeScript Chart control

8 May 202324 minutes to read

Chart will display details about the points through tooltip, when the mouse is moved over the point.

Enable Tooltip for Data Point

By default, tooltip is not visible. Enable the tooltip by setting enable property to true and by injecting Tooltip module using Chart.Inject(Tooltip).

index.ts
index.html
import { Chart, StepLineSeries, DateTime, Legend, Tooltip } from '@syncfusion/ej2-charts';
Chart.Inject(StepLineSeries, DateTime, Legend, Tooltip);

let chartData: any[] = [
    { x: new Date(1975, 0, 1), y: 16, y1: 10, y2: 4.5 },
    { x: new Date(1980, 0, 1), y: 12.5, y1: 7.5, y2: 5 },
    { x: new Date(1985, 0, 1), y: 19, y1: 11, y2: 6.5 },
    { x: new Date(1990, 0, 1), y: 14.4, y1: 7, y2: 4.4 },
    { x: new Date(1995, 0, 1), y: 11.5, y1: 8, y2: 5 },
    { x: new Date(2000, 0, 1), y: 14, y1: 6, y2: 1.5 },
    { x: new Date(2005, 0, 1), y: 10, y1: 3.5, y2: 2.5 },
    { x: new Date(2010, 0, 1), y: 16, y1: 7, y2: 3.7 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Years',
            lineStyle: { width: 0 },
            labelFormat: 'y',
            intervalType: 'Years',
            valueType: 'DateTime',
            edgeLabelPlacement: 'Shift'
        },
        primaryYAxis:
        {
            title: 'Percentage (%)',
            minimum: 0, maximum: 20, interval: 2,
            labelFormat: '{value}%'
        },
        series: [
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y',
                width: 2, name: 'China',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y1',
                width: 2, name: 'Australia',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y2',
                width: 2, name: 'Japan',
                marker: {
                    visible: true, width: 10, height: 10
                },

            },
        ],
        title: 'Unemployment Rates 1975-2010',
        //Tooltip for chart
        tooltip: {enable: true}
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Format the Tooltip

By default, tooltip shows information of x and y value in points. In addition to that, you can show more information in tooltip. For example the format ${series.name} ${point.x} shows series name and point x value.

index.ts
index.html
import { Chart, StepLineSeries, DateTime, Legend, Tooltip } from '@syncfusion/ej2-charts';
Chart.Inject(StepLineSeries, DateTime, Legend, Tooltip);

let chartData: any[] = [
    { x: new Date(1975, 0, 1), y: 16, y1: 10, y2: 4.5 },
    { x: new Date(1980, 0, 1), y: 12.5, y1: 7.5, y2: 5 },
    { x: new Date(1985, 0, 1), y: 19, y1: 11, y2: 6.5 },
    { x: new Date(1990, 0, 1), y: 14.4, y1: 7, y2: 4.4 },
    { x: new Date(1995, 0, 1), y: 11.5, y1: 8, y2: 5 },
    { x: new Date(2000, 0, 1), y: 14, y1: 6, y2: 1.5 },
    { x: new Date(2005, 0, 1), y: 10, y1: 3.5, y2: 2.5 },
    { x: new Date(2010, 0, 1), y: 16, y1: 7, y2: 3.7 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Years',
            lineStyle: { width: 0 },
            labelFormat: 'y',
            intervalType: 'Years',
            valueType: 'DateTime',
            edgeLabelPlacement: 'Shift'
        },
        primaryYAxis:
        {
            title: 'Percentage (%)',
            minimum: 0, maximum: 20, interval: 2,
            labelFormat: '{value}%'
        },
        series: [
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y',
                width: 2, name: 'China',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y1',
                width: 2, name: 'Australia',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y2',
                width: 2, name: 'Japan',
                marker: {
                    visible: true, width: 10, height: 10
                },

            },
        ],
        title: 'Unemployment Rates 1975-2010',
        tooltip: {
            enable: true,
            //tooltip format for chart
            format: '${series.name} ${point.x} : ${point.y}'
        }
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Tooltip Template

Any HTML elements can be displayed in the tooltip by using the ‘template’ property of the tooltip. You can use the ${x} and ${y} as place holders in the HTML element to display the x and y values of the corresponding data point.

index.ts
index.html
import { Chart, StepLineSeries, Legend, Tooltip } from '@syncfusion/ej2-charts';
Chart.Inject(StepLineSeries, Legend, Tooltip);

let chartData: any[] = [
    { x: 1975, y: 16, y1: 10, y2: 4.5 },
    { x: 1980, y: 12.5, y1: 7.5, y2: 5 },
    { x: 1985, y: 19, y1: 11, y2: 6.5 },
    { x: 1990, y: 14.4, y1: 7, y2: 4.4 },
    { x: 1995, y: 11.5, y1: 8, y2: 5 },
    { x: 2000, y: 14, y1: 6, y2: 1.5 },
    { x: 2005, y: 10, y1: 3.5, y2: 2.5 },
    { x: 2010, y: 16, y1: 7, y2: 3.7 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Years',
            lineStyle: { width: 0 },
            minimum: 1975,
            maximum: 2010,
            interval: 5,
            edgeLabelPlacement: 'Shift'
        },
        primaryYAxis:
        {
            title: 'Percentage (%)',
            minimum: 0, maximum: 20, interval: 2,
            labelFormat: '{value}%'
        },
        series: [
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y',
                width: 2, name: 'China',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y1',
                width: 2, name: 'Australia',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y2',
                width: 2, name: 'Japan',
                marker: {
                    visible: true, width: 10, height: 10
                },

            },
        ],
        title: 'Unemployment Rates 1975-2010',
        tooltip: {
            enable: true,
            //tooltip template for chart
            template: '<div>${x}</div><div>${y}</div>'
        }
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Customize the Appearance of Tooltip

The fill and border properties are used to customize the background color and border of the tooltip respectively. The textStyle property in the tooltip is used to customize the font of the tooltip text.

index.ts
index.html
import { Chart, StepLineSeries, DateTime, Legend, Tooltip } from '@syncfusion/ej2-charts';
Chart.Inject(StepLineSeries, DateTime, Legend, Tooltip);

let chartData: any[] = [
    { x: new Date(1975, 0, 1), y: 16, y1: 10, y2: 4.5 },
    { x: new Date(1980, 0, 1), y: 12.5, y1: 7.5, y2: 5 },
    { x: new Date(1985, 0, 1), y: 19, y1: 11, y2: 6.5 },
    { x: new Date(1990, 0, 1), y: 14.4, y1: 7, y2: 4.4 },
    { x: new Date(1995, 0, 1), y: 11.5, y1: 8, y2: 5 },
    { x: new Date(2000, 0, 1), y: 14, y1: 6, y2: 1.5 },
    { x: new Date(2005, 0, 1), y: 10, y1: 3.5, y2: 2.5 },
    { x: new Date(2010, 0, 1), y: 16, y1: 7, y2: 3.7 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Years',
            lineStyle: { width: 0 },
            labelFormat: 'y',
            intervalType: 'Years',
            valueType: 'DateTime',
            edgeLabelPlacement: 'Shift'
        },
        primaryYAxis:
        {
            title: 'Percentage (%)',
            minimum: 0, maximum: 20, interval: 2,
            labelFormat: '{value}%'
        },
        series: [
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y',
                width: 2, name: 'China',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y1',
                width: 2, name: 'Australia',
                marker: {
                    visible: true, width: 10, height: 10
                },
            },
            {
                type: 'StepLine',
                dataSource: chartData, xName: 'x', yName: 'y2',
                width: 2, name: 'Japan',
                marker: {
                    visible: true, width: 10, height: 10
                },

            },
        ],
        title: 'Unemployment Rates 1975-2010',
        tooltip: {
            enable: true,
            format: '${series.name} ${point.x} : ${point.y}',
            //fill for tooltip
            fill: '#7bb4eb',
            //border for tooltip
            border: {
                width: 2,
                color: 'grey'
            }
        }
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Zooming and Panning

Enable Zooming

Chart can be zoomed in three ways.

Selection - By setting enableSelectionZooming property to true in zoomSettings, you can zoom the chart by using the rubber band selection.
Mousewheel - By setting enableMouseWheelZooming property to true in zoomSettings, you can zoomin and zoomout the chart by scrolling the mouse wheel.
Pinch - By setting enablePinchZooming property to true in zoomSettings, you can zoom the chart through pinch gesture in touch enabled devices.

Pinch zooming is supported only in browsers that support multi-touch gestures. Currently IE11, Chrome and Opera browsers support multi-touch in desktop devices.

index.ts
index.html
import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);

let series1: Object[] = [];
let point1: Object;
let value: number = 80;
let i: number;
for (i = 1; i < 500; i++) {
    if (Math.random() > .5) {
        value += Math.random();
    } else {
        value -= Math.random();
    }
    point1 = { x: new Date(1950, i + 2, i), y: value.toFixed(1) };
    series1.push(point1);
}
let chart: Chart = new Chart({

        chartArea : {border : {width : 0}},
        primaryXAxis: {
            title: 'Years',
            valueType: 'DateTime',
            labelFormat: 'yMMM',
            edgeLabelPlacement: 'Shift',
            majorGridLines : { width : 0 }
        },
        primaryYAxis:
        {
            title: 'Profit ($)',
            rangePadding: 'None',
            lineStyle : { width: 0 },
            majorTickLines : {width : 0}
        },
        series: [
            {
                type: 'Area',
                dataSource: series1,
                name: 'Product X',
                xName: 'x',
                yName: 'y',
                border: { width: 0.5, color: '#00bdae' },
                animation: { enable: false }
            },
        ],
        //Zooming for chart
        zoomSettings:
        {
            enableMouseWheelZooming: true,
            enablePinchZooming: true,
            enableSelectionZooming: true
        },
        title: 'Sales History of Product X',
        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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

After zooming the chart, a zooming toolbar will appear with zoom,zoomin, zoomout, pan and reset buttons. Selecting the Pan option will allow to pan the chart and selecting the Reset option will reset the zoomed chart.

Modes of Zooming

The mode property in zoomSettings specifies whether the chart is allowed to scale along the horizontal axis or vertical axis. The default value of the mode is XY (both axis).

There are three types of mode.

X- Allows us to zoom the chart horizontally.
Y - Allows us to zoom the chart vertically.
XY – Allows us to zoom the chart both vertically and horizontally.

index.ts
index.html
import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);

let series1: Object[] = [];
let point1: Object;
let value: number = 80;
let i: number;
for (i = 1; i < 500; i++) {
    if (Math.random() > .5) {
        value += Math.random();
    } else {
        value -= Math.random();
    }
    point1 = { x: new Date(1950, i + 2, i), y: value.toFixed(1) };
    series1.push(point1);
}
let chart: Chart = new Chart({

        chartArea : {border : {width : 0}},
        primaryXAxis: {
            title: 'Years',
            valueType: 'DateTime',
            labelFormat: 'yMMM',
            edgeLabelPlacement: 'Shift',
            majorGridLines : { width : 0 }
        },
        primaryYAxis:
        {
            title: 'Profit ($)',
            rangePadding: 'None',
            lineStyle : { width: 0 },
            majorTickLines : {width : 0}
        },
        series: [
            {
                type: 'Area',
                dataSource: series1,
                name: 'Product X',
                xName: 'x',
                yName: 'y',
                border: { width: 0.5, color: '#00bdae' },
                animation: { enable: false }
            },
        ],
        zoomSettings:
        {
            enableSelectionZooming: true,
            //zoom mode as x
            mode: 'X'
        },
        title: 'Sales History of Product X',
        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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Customizing Zooming Toolbar

By default, zoomin, zoomout, pan and reset buttons will be displayed for zoomed chart. You can customize to show your desire tools in the toolbar using toolbarItems property.

index.ts
index.html
import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);

let series1: Object[] = [];
let point1: Object;
let value: number = 80;
let i: number;
for (i = 1; i < 500; i++) {
    if (Math.random() > .5) {
        value += Math.random();
    } else {
        value -= Math.random();
    }
    point1 = { x: new Date(1950, i + 2, i), y: value.toFixed(1) };
    series1.push(point1);
}
let chart: Chart = new Chart({

        chartArea : {border : {width : 0}},
        primaryXAxis: {
            title: 'Years',
            valueType: 'DateTime',
            labelFormat: 'yMMM',
            edgeLabelPlacement: 'Shift',
            majorGridLines : { width : 0 }
        },
        primaryYAxis:
        {
            title: 'Profit ($)',
            rangePadding: 'None',
            lineStyle : { width: 0 },
            majorTickLines : {width : 0}
        },
        series: [
            {
                type: 'Area',
                dataSource: series1,
                name: 'Product X',
                xName: 'x',
                yName: 'y',
                border: { width: 0.5, color: '#00bdae' },
                animation: { enable: false }
            },
        ],
        zoomSettings:
        {
            enableSelectionZooming: true,
            //toolbar items for zooming toolkit
            toolbarItems: ['Zoom', 'Pan', 'Reset']
        },
        title: 'Sales History of Product X',
        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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Note: To use zooming feature, we need to inject Zoom module Chart.Inject(Zoom) method.

Crosshair

Crosshair has a vertical and horizontal line to view the value of the axis at mouse or touch position.

Enable Crosshair

Crosshair lines can be enabled by using enable property in the crosshair. Likewise tooltip label for an axis can be enabled by using enable property of crosshairTooltip in the corresponding axis.

index.ts
index.html
import { Chart, LineSeries, Crosshair, DateTime, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, DateTime, Crosshair, Legend);

let series1: Object[] = [];
let series2: Object[] = [];
let point1: Object;
let point2: Object;
let value: number = 60;
let value1: number = 50;
let i: number;
for (i = 1; i < 250; i++) {
    if (Math.random() > .5) {
        value += Math.random();
        value1 += Math.random();
    } else {
        value -= Math.random();
        value1 -= Math.random();
    }
    point1 = { x: new Date(2000, i, 1), y: value };
    point2 = { x: new Date(2000, i, 1), y: value1 };
    series1.push(point1);
    series2.push(point2);
}
let chart: Chart = new Chart({
        primaryXAxis: {
            majorGridLines: { width: 0 },
            valueType: 'DateTime',
            crosshairTooltip: { enable: true },
            labelFormat: 'yMMM'
        },
        primaryYAxis:
        {
            minimum: 10, maximum: 90, interval: 10,
            title: 'Temperature (°F)',
            rowIndex: 0,
            crosshairTooltip: { enable: true }
        },
        axes: [
            {
                majorGridLines: { width: 0 },
                rowIndex: 0, opposedPosition: true,
                minimum: 0, maximum: 160, interval: 20,
                name: 'yAxis', title: 'Rainfall (MM)',
                crosshairTooltip: { enable: true }
            }
        ],
        series: [
            {
                type: 'Line', width: 2, name: 'Temperature',
                dataSource: series1, xName: 'x', yName: 'y'
            },
            {
                type: 'Line', name: 'Rainfall', width: 2,
                dataSource: series2, xName: 'x', yName: 'y',
                yAxisName: 'yAxis'
            }
        ],
        //crosshair for chart
        crosshair: { enable: true },
        legendSettings: { visible: true },
        title: 'Weather Condition'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Customization

The fill and textStyle prop property of the crosshairTooltip is used to customize the background color and font style of the crosshair label respectively. Color and width of the crosshair line can be customized by using the line property in the crosshair.

index.ts
index.html
import { Chart, LineSeries, Crosshair, DateTime, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, DateTime, Crosshair, Legend);

let series1: Object[] = [];
let series2: Object[] = [];
let point1: Object;
let point2: Object;
let value: number = 60;
let value1: number = 50;
let i: number;
for (i = 1; i < 250; i++) {
    if (Math.random() > .5) {
        value += Math.random();
        value1 += Math.random();
    } else {
        value -= Math.random();
        value1 -= Math.random();
    }
    point1 = { x: new Date(2000, i, 1), y: value };
    point2 = { x: new Date(2000, i, 1), y: value1 };
    series1.push(point1);
    series2.push(point2);
}
let chart: Chart = new Chart({
        primaryXAxis: {
            majorGridLines: { width: 0 },
            valueType: 'DateTime',
            crosshairTooltip: { enable: true, fill: 'green' },
            labelFormat: 'yMMM'
        },
        primaryYAxis:
        {
            minimum: 10, maximum: 90, interval: 10,
            title: 'Temperature (°F)',
            rowIndex: 0,
            crosshairTooltip: { enable: true, fill: 'green' },
        },
        axes: [
            {
                majorGridLines: { width: 0 },
                rowIndex: 0, opposedPosition: true,
                minimum: 0, maximum: 160, interval: 20,
                name: 'yAxis', title: 'Rainfall (MM)',
                crosshairTooltip: { enable: true, fill: 'green' },
            }
        ],
        series: [
            {
                type: 'Line', width: 2, name: 'Temperature',
                dataSource: series1, xName: 'x', yName: 'y'
            },
            {
                type: 'Line', name: 'Rainfall', width: 2,
                dataSource: series2, xName: 'x', yName: 'y',
                yAxisName: 'yAxis'
            }
        ],
        crosshair: {
            enable: true,
            //customizing crosshair
            line: {width: 2, color: 'green'} },
        legendSettings: { visible: true },
        title: 'Weather Condition'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Note: To use crosshair feature, we need to inject Crosshair module Chart.Inject(Crosshair) method.

Trackball

Trackball is used to track a data point closest to the mouse or touch position. Trackball marker indicates the closest point and trackball tooltip displays the information about the point. To use trackball feature, we need to inject Crosshair module and Tooltip module using
Chart.Inject(Crosshair, Tooltip).

Trackball can be enabled by setting the enable property of the crosshair to true and
shared property in tooltip to true in chart.

index.ts
index.html
import {  Tooltip, Crosshair, DateTime } from '@syncfusion/ej2-charts';
import { Chart, LineSeries, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, DateTime, Tooltip, Crosshair, Legend);

let chartData: Object[] = [
    { x: new Date(2000, 2, 11), y: 15, y1: 39, y2: 60, y3: 75, y4: 85 },
    { x: new Date(2000, 9, 14), y: 20, y1: 30, y2: 55, y3: 75, y4: 83 },
    { x: new Date(2001, 2, 11), y: 25, y1: 28, y2: 48, y3: 68, y4: 85 },
    { x: new Date(2001, 9, 16), y: 21, y1: 35, y2: 57, y3: 75, y4: 87 },
    { x: new Date(2002, 2, 7), y: 13, y1: 39, y2: 62, y3: 71, y4: 82 },
    { x: new Date(2002, 9, 7), y: 18, y1: 41, y2: 64, y3: 69, y4: 74 },
    { x: new Date(2003, 2, 11), y: 24, y1: 45, y2: 57, y3: 81, y4: 73 },
    { x: new Date(2003, 9, 14), y: 23, y1: 48, y2: 53, y3: 84, y4: 75 },
    { x: new Date(2004, 2, 6), y: 19, y1: 54, y2: 63, y3: 85, y4: 73 },
    { x: new Date(2004, 9, 6), y: 31, y1: 55, y2: 50, y3: 87, y4: 60 },
    { x: new Date(2005, 2, 11), y: 39, y1: 57, y2: 66, y3: 75, y4: 48 },
    { x: new Date(2005, 9, 11), y: 50, y1: 60, y2: 65, y3: 70, y4: 55 },
    { x: new Date(2006, 2, 11), y: 24, y1: 60, y2: 79, y3: 85, y4: 40 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Years',
            minimum: new Date(2000, 1, 1), maximum: new Date(2006, 2, 11),
            intervalType: 'Years',
            valueType: 'DateTime',
            lineStyle: { width: 0 },
            majorGridLines: { width: 0 },
            edgeLabelPlacement: 'Shift'
        },
        primaryYAxis:
        {
            title: 'Revenue in Millions',
            labelFormat: '{value}M',
            majorTickLines: { width: 0 },
            minimum: 10, maximum: 90,
            lineStyle: { width: 0 }
        },
        series: [
            {
                dataSource: chartData, name: 'John', xName: 'x',
                marker: { visible: true },
                type: 'Line', width: 2,
                yName: 'y'
            },
            {
                dataSource: chartData, name: 'Andrew', xName: 'x',
                marker: { visible: true },
                type: 'Line', width: 2,
                yName: 'y1'
            },
            {
                dataSource: chartData, name: 'Thomas', xName: 'x',
                marker: { visible: true },
                type: 'Line', width: 2,
                yName: 'y2'
            },
            {
                dataSource: chartData, name: 'Mark', xName: 'x',
                marker: { visible: true },
                type: 'Line', width: 2,
                yName: 'y3'
            },
            {
                dataSource: chartData, name: 'William', xName: 'x',
                marker: { visible: true },
                type: 'Line', width: 2,
                yName: 'y4'
            }
        ],
        // trackball for chart
        tooltip: { enable: true, shared: true, format: '${series.name} : ${point.x} : ${point.y}' },
        crosshair: { enable: true, lineType: 'Vertical' },
        title: 'Average Sales per Person'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Selection

Chart provides selection support for the series and its data points on mouse click.

When Mouse is clicked on the data points, the corresponding series legend also will be selected.

We have different types of selection mode for selecting a data.

None
Point
Series
Cluster
DragXY
DragX
DragY

Point

You can select a point, by setting selectionMode to point.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column'
    }],
    // selection mode as point
    selectionMode: 'Point',
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Series

You can select a series, by setting selectionMode to series.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column'
    }],
    // selection mode as series
    selectionMode: 'Series',
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Cluster

You can select the points that corresponds to the same index in all the series, by setting selectionMode to cluster.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column'
    }],
    // selection mode as cluster
    selectionMode: 'Cluster',
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

DragXY, DragX and DragY

To fetch a collection of data under a particular region, you have to set selectionMode as DragXY.

DragXY - Allow us to select data with respect to both horizontal and vertical axis.
DragX - Allow us to select data with respect to horizontal axis.
DragY - Allow us to select data with respect to vertical axis.

The selected data’s are returned as an array collection in the dragComplete event.

index.ts
index.html
import { Chart, ScatterSeries, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ScatterSeries, Legend, Selection);

let series1: Object[] = [];
let series2: Object[] = [];
let point1: Object;
let value: number = 80;
let value1: number = 70;
let i: number;
for (i = 1; i < 120; i++) {
    if (Math.random() > 0.5) {
        value += Math.random();
    } else {
        value -= Math.random();
    }
    value = value < 60 ? 60 : value > 90 ? 90 : value;
    point1 = { x: 120 + (i / 2), y: value.toFixed(1) };
    series1.push(point1);
}
for (i = 1; i < 120; i++) {
    if (Math.random() > 0.5) {
        value1 += Math.random();
    } else {
        value1 -= Math.random();
    }
    value1 = value1 < 60 ? 60 : value1 > 90 ? 90 : value1;
    point1 = { x: 120 + (i / 2), y: value1.toFixed(1) };
    series2.push(point1);
}

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Height (cm)',
        minimum: 120, maximum: 180,
        edgeLabelPlacement: 'Shift',
        labelFormat: '{value}cm'
    },
    primaryYAxis:
    {
        title: 'Weight (kg)',
        minimum: 60, maximum: 90,
        labelFormat: '{value}kg',
        rangePadding: 'None'
    },
    series: [
        {
            type: 'Scatter',
            dataSource: series1, xName: 'x', yName: 'y',
            name: 'Male', opacity : 0.7,
            marker: { width: 10, height: 10 }
        }, {
            type: 'Scatter',
            dataSource: series2, xName: 'x', yName: 'y',
            name: 'Female', opacity : 0.7,
            marker: { width: 10, height: 10 }
        }
    ],
    // selection mode as dragxy
    selectionMode: 'DragXY',
    title: 'Height Vs Weight'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Selection Type

You can select multiple points or series, by enabling the isMultiSelect
property.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column'
    }],
    selectionMode: 'Point',
    // multipselect forselection
    isMultiSelect: true,
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Customizing Selection Style

You can apply custom style to selected points or series with selectionStyle property.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column',
        //Selection style for chart series selection
        selectionStyle: 'chartSelection1'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column',
        selectionStyle: 'chartSelection2'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column',
        selectionStyle: 'chartSelection3'
    }],
    selectionMode: 'Point',
    isMultiSelect: true,
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Selection on Load

You can able to select a point or series programmatically on a chart using selectedDataIndexes property.

index.ts
index.html
import { Chart, ColumnSeries, Category, Legend, Selection } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend, Selection);
let chartData: any[] = [
      { country: "USA", gold: 50, silver: 70, bronze: 45 },
      { country: "China", gold: 40, silver: 60, bronze: 55 },
      { country: "Japan", gold: 70, silver: 60, bronze: 50 },
      { country: "Australia", gold: 60, silver: 56, bronze: 40 },
      { country: "France", gold: 50, silver: 45, bronze: 35 },
      { country: "Germany", gold: 40, silver: 30, bronze: 22 },
      { country: "Italy", gold: 40, silver: 35, bronze: 37 },
      { country: "Sweden", gold: 30, silver: 25, bronze: 27 }
];
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries'
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column',
        animation: {enable: false},
        selectionStyle: 'chartSelection1'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column',
        animation: {enable: false},
        selectionStyle: 'chartSelection2'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column',
        animation: {enable: false},
        selectionStyle: 'chartSelection3'
    }],
    selectionMode: 'Point',
    isMultiSelect: true,
    // Selcted data indexes for chart series
    selectedDataIndexes: [
        { series: 0, point: 1}, { series: 2, point: 3}
    ],
    title: 'Olympic Medals'
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>