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Legend in JavaScript Chart control

23 Mar 2023 / 18 minutes to read

Legend provides information about the series rendered in the chart.

Position and Alignment

By using the position property, you can position the legend at left, right, top or bottom of the chart. The legend is positioned at the bottom of the chart, by default.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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'
    }],
    title: 'Olympic Medals',
    legendSettings: {
        visible: true,
        //Legend position as top
        position:'Top'
        }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Custom position helps you to position the legend anywhere in the chart using x, y coordinates.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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'
    },
    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'
    }],
    legendSettings: {
        visible: true,
        //Legend position as custom
        position:'Custom',
        location: { x: 200, y: 20 } }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Reverse

You can reverse the order of the legend items by using the reverse property. By default, legend for the first series in the collection will be placed first.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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'
    }],
    title: 'Olympic Medals',
    legendSettings: {
        visible: true,
        reverse: 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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Alignment

You can align the legend as center, far or near to the chart using alignment property.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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'
    }],
    title: 'Olympic Medals',
    legendSettings: {
        visible: true,
        position:'Top',
        //Legend alignment as near
        alignment: 'Near' }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Customization

To change the legend icon shape, you can use legendShape property in the series. By default legend icon shape is seriesType.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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',
        //Legend icon type for chart
        legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column',
        legendShape: 'SeriesType'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column',
        legendShape: 'Rectangle'
    }],
    title: 'Olympic Medals',
    legendSettings: { visible: 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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Size

By default, legend takes 20% - 25% of the chart’s height horizontally, when it is placed on top or bottom position and 20% - 25% of the width vertically, while placing on left or right position of the chart. You can change this default legend size by using the width and height property of the legendSettings.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column', legendShape: 'Circle'
    }],
    title: 'Olympic Medals',
    legendSettings: {
         visible: true,
         //Legend size for chart
         width: '500', height: '100',
         border: { width: 1, color: 'pink'}
    }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Item Size

You can customize the size of the legend items by using the shapeHeight and shapeWidth property.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column', legendShape: 'Circle'
    }],
    title: 'Olympic Medals',
    legendSettings: {
         visible: true,
         //Legend item size for chart
         shapeHeight: 10, shapeWidth: 10
    }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Paging for Legend

Paging will be enabled by default, when the legend items exceeds the legend bounds. You can view each legend items by navigating between the pages using navigation buttons.

Source

Preview

index.ts

index.html

import { Chart, LineSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, Category, Legend);
let chartData: any[] = [
    { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
    { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
    { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
    { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
    { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
    { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Countries',
            valueType: 'Category', interval: 1,
            labelIntersectAction : 'Rotate45'
        },
        primaryYAxis:
        {
            title: 'Penetration (%)',
            labelFormat: '{value}%',
            minimum: 0, maximum: 90
        },
        series: [
            {
                type: 'Line', name: 'December 2007',
                dataSource: chartData, xName: 'x', yName: 'y', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Diamond'
                }
            }, {
                type: 'Line', name: 'December 2008',
                dataSource: chartData, xName: 'x', yName: 'y1', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Pentagon'
                }
            }, {
                type: 'Line', name: 'December 2009',
                dataSource: chartData, xName: 'x', yName: 'y2', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Triangle',
                }
            }, {
                type: 'Line', name: 'December 2010',
                dataSource: chartData, xName: 'x', yName: 'y3', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Circle'
                }
            }
        ],
        title: 'FB Penetration of Internet Audience',
        legendSettings: {
            padding: 10, shapePadding: 10,
            visible: true, border: {
                width: 2, color: 'grey'
            },
            width: '200'
        }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Text Wrap

When the legend text exceeds the container, the text can be wrapped by using textWrap Property. End user can also wrap the legend text based on the maximumLabelWidth property.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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 Medals', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver Medals', type: 'Column'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze Medals', type: 'Column'
    }],
    title: 'Olympic Medals',
    legendSettings: {
        visible: true,
        position:'Right',
        textWrap:'Wrap',
        maximumLabelWidth:50,
        }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Set the label color based on series color

You can set the legend label color based on series color by using chart’s loaded event.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend, ILoadedEventArgs } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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 }
];
// declare the series colors
let colors: string[] = ['#00BDAE', '#404041', '#357CD2'];
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'
    }],
    title: 'Olympic Medals',
    loaded: (args: ILoadedEventArgs) => {
        let chart: HTMLElement = document.querySelector('.e-chart');;
        let legendTextCol: any = chart.querySelectorAll('[id*="chart_legend_text_"]');
        for (let i = 0; i < legendTextCol.length; i++) {
            //set the color to legend label
            legendTextCol[i].setAttribute('fill', colors[i]);
        }
    },
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Series selection on Legend

By default, legend click enables you to collapse the series visibility. On other hand, if you need to select a series through legend click, disable the toggleVisibility.

Source

Preview

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', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column', legendShape: 'Circle'
    }],
    title: 'Olympic Medals',
    selectionMode: 'Series',
    legendSettings: {
         visible: true,
         // series selection on legend
         toggleVisibility: 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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Collapsing Legend Item

By default, series name will be displayed as legend. To skip the legend for a particular series, you can give empty string to the series name.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        type: 'Column', legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column', legendShape: 'Circle'
    }],
    title: 'Olympic Medals',
    legendSettings: {
         visible: true,
         toggleSeriesVisibility: 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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Title

You can set title for legend using title property in legendSettings. You can also customize the fontStyle, size, fontWeight, color, textAlignment, fontFamily, opacity and textOverflow of legend title. titlePosition is used to set the legend position in Top, Left and Right position. maximumTitleWidth is used to set the width of the legend title. By default, it will be 100px.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(ColumnSeries, Category, Legend);
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',
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        name: 'Gold', type: 'Column',
        //Legend icon type for chart
        legendShape: 'Circle'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'silver',
        name: 'Silver', type: 'Column',
        legendShape: 'SeriesType'
    }, {
        dataSource: chartData,
        xName: 'country', yName: 'bronze',
        name: 'Bronze', type: 'Column',
        legendShape: 'Rectangle'
    }],
    title: 'Olympic Medals',
    legendSettings: { visible: true, title: 'Countries' }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

By default, the page number will be enabled while legend paging. Now, you can disable that page number and also you can get left and right arrows for page navigation. You have to set false value to enablePages to get this support.

Source

Preview

index.ts

index.html

import { Chart, LineSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, Category, Legend);
let chartData: any[] = [
    { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
    { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
    { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
    { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
    { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
    { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Countries',
            valueType: 'Category', interval: 1,
            labelIntersectAction : 'Rotate45'
        },
        primaryYAxis:
        {
            title: 'Penetration (%)',
            labelFormat: '{value}%',
            minimum: 0, maximum: 90
        },
        series: [
            {
                type: 'Line', name: 'December 2007',
                dataSource: chartData, xName: 'x', yName: 'y', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Diamond'
                }
            }, {
                type: 'Line', name: 'December 2008',
                dataSource: chartData, xName: 'x', yName: 'y1', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Pentagon'
                }
            }, {
                type: 'Line', name: 'December 2009',
                dataSource: chartData, xName: 'x', yName: 'y2', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Triangle',
                }
            }, {
                type: 'Line', name: 'December 2010',
                dataSource: chartData, xName: 'x', yName: 'y3', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Circle'
                }
            }
        ],
        title: 'FB Penetration of Internet Audience',
        legendSettings: {
            width: '180',
            enablePages: 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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Legend Item Padding

The itemPadding property can be used to adjust the space between the legend items.

Source

Preview

index.ts

index.html

import { Chart, LineSeries, Category, Legend } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries, Category, Legend);
let chartData: any[] = [
    { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
    { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
    { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
    { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
    { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
    { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
];
let chart: Chart = new Chart({
        primaryXAxis: {
            title: 'Countries',
            valueType: 'Category', interval: 1,
            labelIntersectAction : 'Rotate45'
        },
        primaryYAxis:
        {
            title: 'Penetration (%)',
            labelFormat: '{value}%',
            minimum: 0, maximum: 90
        },
        series: [
            {
                type: 'Line', name: 'December 2007',
                dataSource: chartData, xName: 'x', yName: 'y', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Diamond'
                }
            }, {
                type: 'Line', name: 'December 2008',
                dataSource: chartData, xName: 'x', yName: 'y1', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Pentagon'
                }
            }, {
                type: 'Line', name: 'December 2009',
                dataSource: chartData, xName: 'x', yName: 'y2', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Triangle',
                }
            }, {
                type: 'Line', name: 'December 2010',
                dataSource: chartData, xName: 'x', yName: 'y3', width: 2,
                marker: {
                    visible: true,
                    width: 10, height: 10,
                    shape: 'Circle'
                }
            }
        ],
        title: 'FB Penetration of Internet Audience',
        legendSettings: {
            enablePages: false,
            itemPadding: 30
        }
}, '#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>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Note: To use legend feature, we need to inject Legend using Chart.Inject(Legend).

Legend in JavaScript Chart control

Position and Alignment

Customization

Legend Size

Legend Item Size

Paging for Legend

Legend Text Wrap

Set the label color based on series color

Series selection on Legend

Collapsing Legend Item

Legend Title

Arrow Page Navigation

Legend Item Padding

See Also