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Axis in JavaScript HeatMap Chart control

17 Mar 2023 / 22 minutes to read

Heat map consists of two axes namely, X-axis and Y-axis that displays the row headers and column headers to plot the data points respectively. You can define the type, format, and other customizing options for both axes in the heat map.

Types

There are three different axis types available in the heat map, which defines the data type of the axis labels. You can define the axis type by using the valueType property in the heat map.

Category axis

Category axis type is used to represent the string values in axis labels.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
     [73, 39, 26, 39, 94, 0],
     [93, 58, 53, 38, 26, 68],
     [99, 28, 22, 4, 66, 90],
     [14, 26, 97, 69, 69, 3],
     [7, 46, 47, 47, 88, 6],
     [41, 55, 73, 23, 3, 79],
     [56, 69, 21, 86, 3, 33],
     [45, 7, 53, 81, 95, 79],
     [60, 77, 74, 68, 88, 51],
     [25, 25, 10, 12, 78, 14],
     [25, 56, 55, 58, 12, 82],
     [74, 33, 88, 23, 86, 59]];

let heatmap: HeatMap = new HeatMap({
    xAxis: {
        valueType:"Category",
        labels: ['Nancy', 'Andrew','Janet', 'Margaret', 'Steven',
        'Michael', 'Robert', 'Laura', 'Anne', 'Paul', 'Karin', 'Mario'],
         },
         yAxis:{
             valueType:"Category",
             labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
             },
             dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Numeric axis

Numeric axis type is used to represent the numeric values in axis labels.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
     [73, 39, 26, 39, 94, 0],
     [93, 58, 53, 38, 26, 68],
     [99, 28, 22, 4, 66, 90],
     [14, 26, 97, 69, 69, 3],
     [7, 46, 47, 47, 88, 6],
     [41, 55, 73, 23, 3, 79],
     [56, 69, 21, 86, 3, 33],
     [45, 7, 53, 81, 95, 79],
     [60, 77, 74, 68, 88, 51],
     [25, 25, 10, 12, 78, 14],
     [25, 56, 55, 58, 12, 82],
     [74, 33, 88, 23, 86, 59]];

let heatmap: HeatMap = new HeatMap({
    xAxis: {
        valueType:"Numeric",
        minimum: 0,
        maximum: 11,
         },
         yAxis:{
             valueType:"Numeric",
             minimum: 0,
             maximum: 5,
             },
             dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Date-time axis

Date-time axis type is used to represent the date-time values in axis labels with a specific format. In date-time axis, you can define the start and end date/time using the minimum and maximum properties.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor} from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
            [36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985],
            [34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703],
            [34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981],
            [32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965],
            [31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699],
            [31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522],
            [32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939],
            [32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411],
            [32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304],
            [34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450],
            [35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108]
        ];

let heatmap: HeatMap = new HeatMap({
        titleSettings: {
            text: 'Monthly Flight Traffic at JFK Airport',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        },
        xAxis: {
            valueType:"DateTime",
            minimum: new Date(2007,0,1),
            maximum: new Date(2017,0,1),
            intervalType:"Years",
            labelFormat:"yyyy",
            labelRotation: 45,
            labelIntersectAction: 'None'
        },
        yAxis: {
            labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May',
                'Jun', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'],
        },
        legendSettings: {
            visible: false,
        },
        cellSettings: {
            showLabel: false,
            border: {
                width: 0,
            },
            format: '{value} flights'
        },
        dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Inversed axis

Heat map supports inversing the axis origin for both axes, where the axis labels are placed in an inversed manner. You can enable axis inversing by enabling the isInversed property.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
            [36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985],
            [34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703],
            [34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981],
            [32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965],
            [31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699],
            [31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522],
            [32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939],
            [32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411],
            [32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304],
            [34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450],
            [35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108]
        ];

let heatmap: HeatMap = new HeatMap({
        titleSettings: {
            text: 'Monthly Flight Traffic at JFK Airport',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        },
        xAxis: {
            valueType:"DateTime",
            minimum: new Date(2007,0,1),
            maximum: new Date(2017,0,1),
            intervalType:"Years",
            labelFormat:"yyyy",
            labelRotation: 45,
            labelIntersectAction: 'None',
            isInversed:true
        },
        yAxis: {
            labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May',
                'Jun', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'],
        },
        legendSettings: {
            visible: false,
        },
        cellSettings: {
            showLabel: false,
            border: {
                width: 0,
            },
            format: '{value} flights'
        },
        dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Opposed axis

In heat map, you can place the axis label in an opposite position of its default axis label position by using the opposedPosition property.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
            [36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985],
            [34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703],
            [34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981],
            [32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965],
            [31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699],
            [31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522],
            [32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939],
            [32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411],
            [32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304],
            [34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450],
            [35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108]
        ];

let heatmap: HeatMap = new HeatMap({
        titleSettings: {
            text: 'Monthly Flight Traffic at JFK Airport',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        },
        xAxis: {
            valueType:"DateTime",
            minimum: new Date(2007,0,1),
            maximum: new Date(2017,0,1),
            intervalType:"Years",
            labelFormat:"yyyy",
            labelRotation: 45,
            labelIntersectAction: 'None',
            opposedPosition:true
        },
        yAxis: {
            labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May',
                'Jun', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'],
        },
        legendSettings: {
            visible: false,
        },
        cellSettings: {
            showLabel: false,
            border: {
                width: 0,
            },
            format: '{value} flights'
        },
        dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Label formatting

Heat map supports formatting the axis labels by using the labelFormat property. Using this property, you can customize the axis label by global string format (‘P’, ‘C’, etc) or customized format like ‘{value}°C’.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
        [73, 39, 26, 39, 94, 0],
        [93, 58, 53, 38, 26, 68],
        [99, 28, 22, 4, 66, 90],
        [14, 26, 97, 69, 69, 3],
        [7, 46, 47, 47, 88, 6],
        [41, 55, 73, 23, 3, 79],
        [56, 69, 21, 86, 3, 33],
        [45, 7, 53, 81, 95, 79],
        [60, 77, 74, 68, 88, 51],
        [25, 25, 10, 12, 78, 14],
        [25, 56, 55, 58, 12, 82],
        [74, 33, 88, 23, 86, 59]
    ];

let heatmap: HeatMap = new HeatMap({
        xAxis: {
            valueType:"DateTime",
            minimum: new Date(2007,0,1),
            intervalType:"Years",
            labelFormat:"yyyy",
        },
        yAxis: {
           valueType:"Numeric",
           labelFormat:"${value}"
        },
        legendSettings: {
            visible: false,
        },
        dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Axis intervals

In heat map, you can define an interval between the axis labels using the interval property. In date-time axis, you can change the interval mode by using the intervalType property. The date-time axis supports the following interval types:

Years
Months
Days
Hours
Minutes

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip, Adaptor } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend, Tooltip, Adaptor);

let heatmapData: any [] = [
        [36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985],
        [34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703],
        [34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981],
        [32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965],
        [31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699],
        [31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522],
        [32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939],
        [32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411],
        [32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304],
        [34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450],
        [35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108]
    ];

let heatmap: HeatMap = new HeatMap({
    titleSettings: {
        text: 'Monthly Flight Traffic at JFK Airport',
        textStyle: {
            size: '15px',
            fontWeight: '500',
            fontStyle: 'Normal',
            fontFamily: 'Segoe UI'
        }
    },
    xAxis: {
        valueType:"DateTime",
        minimum: new Date(2007,0,1),
        maximum: new Date(2017,0,1),
        intervalType:"Years",
        interval:2,
        labelFormat:"yyyy"
    },
    yAxis: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May',
            'Jun', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'],
    },
    legendSettings: {
        visible: false,
    },
    cellSettings: {
        showLabel: false,
        border: {
            width: 0,
        },
        format: '{value} flights'
    },
    dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Axis label increment

Axis label increment in the heat map is used to display the axis labels with regular interval values in numeric and date-time axes. The labels will be displayed with tick gaps when you set the label interval. But, to achieve the same behavior without tick gaps, use the label increment. You can set the axis label increment using the increment property and the default value of this property is 1.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Legend);

let heatmapData: any [] = [
[73, 39, 26, 39, 94, 0],
[93, 58, 53, 38, 26, 68],
[99, 28, 22, 4, 66, 90],
[14, 26, 97, 69, 69, 3],
[7, 46, 47, 47, 88, 6],
[41, 55, 73, 23, 3, 79],
[56, 69, 21, 86, 3, 33],
[45, 7, 53, 81, 95, 79],
[60, 77, 74, 68, 88, 51],
[25, 25, 10, 12, 78, 14],
[25, 56, 55, 58, 12, 82],
[74, 33, 88, 23, 86, 59]];

let heatmap: HeatMap = new HeatMap({
xAxis: {
    valueType:"Numeric",
    minimum: 0,
    increment:2
},
yAxis:{
    valueType:"Numeric",
    minimum: 0,
    increment:3
},
dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Limiting labels in date-time axis

You can display the axis labels at specific time intervals along with the date-time axis using the showLabelOn property. This property supports the following types:

None: Displays the axis labels based on the intervalType and interval property of the axis. This type is default value of the showLabelOn property.
Years: Displays the axis labels on every year between given date-time range.
Months: Displays the axis labels on every month between given date-time range.
Days: Displays the axis labels on every day between given date-time range.
Minutes: Displays the axis labels on every minute between given date-time range.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Legend, Tooltip,ITooltipEventArgs } from '@syncfusion/ej2-heatmap';
import { Internationalization } from '@syncfusion/ej2-base';
HeatMap.Inject(Legend, Tooltip);

let heatmapData: any [] = [
[null, null, null, null, 16, 48, 0],
[0, 15, 0, 24, 0, 39, 0],
[0, 18, 37, 0, 0, 50, 0],
[0, 10, 0, 0, 44, 5, 0],
[0, 36, 0, 45, 20, 18, 0],
[0, 28, 1, 42, 0, 10, 0],
[0, 16, 32, 0, 1, 25, 0],
[0, 31, 2, 9, 24, 0, 0],
[0, 8, 47, 0, 0, 35, 0],
[0, 31, 0, 0, 0, 40, 0],
[0, 8, 0, 27, 0, 35, 0],
[0, 12, 9, 45, 0, 8, 0],
[0, 0, 13, 0, 22, 10, 0],
[0, 16, 32, 0, 1, 25, 0],
[0, 31, 2, 9, 24, 0, 0],
[0, 8, 47, 27, 0, 35, 0],
[0, 28, 14, 10, 0, 0, 0],
[0, 36, 0, 45, 20, 18, 0],
[0, 28, 1, 42, 0, 10, 0],
[0, 31, 0, 24, 0, 40, 0],
[0, 8, 47, 27, 0, 35, 0],
[0, 36, 0, 45, 20, 18, 0],
[0, 28, 1, 42, 0, 10, 0],
[0, 31, 0, 24, 0, 40, 0],
[0, 16, 32, 0, 1, 25, 0],
[0, 31, 2, 9, 24, 0, 0],
[0, 8, 47, 27, 0, 35, 0],
[0, 10, 0, 36, 23, 19, 0],
[0, 18, 37, 23, 0, 50, 0],
[0, 28, 14, 10, 0, 0, 0],
[0, 18, 37, 23, 0, 50, 0],
[0, 18, 37, 23, 0, 50, 0],
[0, 28, 14, 10, 0, 0, 0],
[0, 31, 2, 9, 24, 0, 0],
[0, 8, 47, 27, 0, 35, 0],
[0, 10, 2, 0, 44, 5, 0],
[0, 36, 0, 45, 20, 18, 0],
[0, 28, 1, 42, 0, 10, 0],
[0, 31, 0, 24, 0, 40, 1],
[0, 16, 32, 0, 1, 25, 0],
[0, 31, 2, 9, 24, 0, 0],
[0, 8, 47, 27, 0, 35, 0],
[0, 10, 2, 0, 44, 5, 0],
[0, 12, 9, 45, 0, 8, 0],
[0, 0, 13, 35, 22, 10, 0],
[0, 28, 14, 10, 0, 0, 0],
[0, 36, 0, 45, 20, 18, 2],
[0, 28, 1, 42, 0, 10, 0],
[0, 31, 0, 24, 0, 40, 1],
[0, 8, 47, 27, 0, 35, 0],
[0, 10, 2, 0, 44, 5, 0],
[0, 31, 2, 9, 24, 0, 1],
[0, 8, 47, 27, 0, 35, 40],
[0, 10, 2, 0, 44, 5, null]
];

let heatmap: HeatMap = new HeatMap({
titleSettings: {
    text: 'Annual Summary of User Activities in GitLab',
    textStyle: {
        size: '15px',
        fontWeight: '500',
        fontStyle: 'Normal',
        fontFamily: 'Segoe UI'
    }
},
height: '280px',
xAxis: {
        opposedPosition: true,
        valueType: 'DateTime',
        minimum: new Date(2017, 6, 23),
        maximum: new Date(2018, 6, 30),
        intervalType: 'Days',
        showLabelOn: 'Months',
        labelFormat: 'MMM',
        increment: 7,
    },
    yAxis: {
        labels: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
        isInversed: true,
    },
    cellSettings: {
        showLabel: false,
        border: {
            color: 'white'
        }
    },
    paletteSettings: {
        palette: [
            { value: 0, color: 'rgb(238,238,238)', label: 'no contributions' },
            { value: 1, color: 'rgb(172, 213, 242)', label: '1-15 contributions' },
            { value: 16, color: 'rgb(127, 168, 201)', label: '16-31 contributions' },
            { value: 32, color: 'rgb(82, 123, 160)', label: '31-49 contributions' },
            { value: 50, color: 'rgb(37, 78, 119)', label: '50+ contributions' },
        ],
        type: 'Fixed',
        emptyPointColor: 'white'
    },
    showTooltip: true,
    legendSettings: {
        position: 'Bottom',
        width: '20%',
        alignment: 'Near',
        showLabel: true,
        labelDisplayType: 'None',
        enableSmartLegend: true
    },
tooltipRender: (args: ITooltipEventArgs) => {
    let intl: Internationalization = new Internationalization();
    let format: Function = intl.getDateFormat({ format: 'EEE MMM dd, yyyy' });
    let newDate : Date = <Date>args.xValue;
    let date: Date = new Date(newDate.getTime());
    let axisLabel: string[] = args.heatmap.axisCollections[1].axisLabels;
    let index: number = axisLabel.indexOf(args.yLabel);
    (date).setDate((date).getDate() + index);
    let value: string = format(date);
    args.content = [(args.value === 0 ? 'No' : args.value) + ' ' + 'contributions' + '<br>' + value];
},
dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Multi Level Labels

You can add many levels of labels using the multiLevelLabels property.

This property can be configured using the following properties:

Categories
Overflow
Alignment
Text style
Border

Overflow

Using this property, you can trim and wrap the multilevel labels.

Note: This property is only for xAxis.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Tooltip } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Tooltip);

let heatmapData: any [] = [
[52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91],
[68, 52, 63, 51, 30, 51,51, 81, 70, 60, 88, 80],
[60, 50, 42, 53, 66, 70,41, 69, 76, 74, 86, 97],
[66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92,84],
[65, 42, 58, 32, 36, 44,49, 79, 83, 69, 83, 93],
[54, 46, 61, 46, 40, 39,41, 69, 61, 84, 84, 87],
[48, 46, 61, 47, 49, 41,41, 67, 78, 83, 98, 87],
[69, 52, 41, 44, 41, 52,46, 71, 63, 84, 83, 91],
[50, 59, 44, 43, 27, 42,26, 64, 76, 65, 81, 86],
[47, 49, 66, 53, 50, 34,31, 79, 78, 79, 89, 95],
[61, 40, 62, 26, 34, 54,56, 74, 83, 78, 95, 98]
];

 let heatmap: HeatMap = new HeatMap({
    titleSettings: {
        text: 'Product wise Monthly sales revenue for a e-commerce website',
        textStyle: {
            size: '15px',
            fontWeight: '500',
            fontStyle: 'Normal',
            fontFamily: 'Segoe UI'
        }
    },
    xAxis: {
        labels: ['Laptop', 'Mobile', 'Gaming', 'Cosmetics', 'Fragnance', 'Watches', 'Handbags', 'Apparels', 'Kitchenware', 'Furniture', 'Home Decor'],
        multiLevelLabels: [
            {
                overflow:'Trim',
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care',maximumTextWidth: 40},
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]
    },
    yAxis: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        multiLevelLabels: [
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]
    },
    paletteSettings: {
        palette: [{ color: '#F0C27B' },
        { color: '#4B1248' }
        ],
    },
   dataSource: heatmapData
});
heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Alignment

This property provides an option to position the multilevel labels at far, center, near.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Tooltip } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Tooltip);

let heatmapData: any [] = [
[52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91],
[68, 52, 63, 51, 30, 51,51, 81, 70, 60, 88, 80],
[60, 50, 42, 53, 66, 70,41, 69, 76, 74, 86, 97],
[66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92,84],
[65, 42, 58, 32, 36, 44,49, 79, 83, 69, 83, 93],
[54, 46, 61, 46, 40, 39,41, 69, 61, 84, 84, 87],
[48, 46, 61, 47, 49, 41,41, 67, 78, 83, 98, 87],
[69, 52, 41, 44, 41, 52,46, 71, 63, 84, 83, 91],
[50, 59, 44, 43, 27, 42,26, 64, 76, 65, 81, 86],
[47, 49, 66, 53, 50, 34,31, 79, 78, 79, 89, 95],
[61, 40, 62, 26, 34, 54,56, 74, 83, 78, 95, 98]
];

 let heatmap: HeatMap = new HeatMap({
    titleSettings: {
        text: 'Product wise Monthly sales revenue for a e-commerce website',
        textStyle: {
            size: '15px',
            fontWeight: '500',
            fontStyle: 'Normal',
            fontFamily: 'Segoe UI'
        }
    },
    xAxis: {
        labels: ['Laptop', 'Mobile', 'Gaming', 'Cosmetics', 'Fragnance', 'Watches', 'Handbags', 'Apparels',
            'Kitchenware', 'Furniture', 'Home Decor'],
        multiLevelLabels: [
            {
                alignment: 'Near',
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care'},
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]
    },
    yAxis: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        multiLevelLabels: [
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]
    },
    paletteSettings: {
        palette: [{ color: '#F0C27B' },
        { color: '#4B1248' }
        ],
    },
    dataSource: heatmapData
}); heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Text Customization

The textStyle property of multilevel labels provides options to customize the size, color, fontFamily, fontWeight, fontStyle, opacity, textAlignment and textOverflow.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Tooltip } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Tooltip);

let heatmapData: any [] = [
[52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91],
[68, 52, 63, 51, 30, 51,51, 81, 70, 60, 88, 80],
[60, 50, 42, 53, 66, 70,41, 69, 76, 74, 86, 97],
[66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92,84],
[65, 42, 58, 32, 36, 44,49, 79, 83, 69, 83, 93],
[54, 46, 61, 46, 40, 39,41, 69, 61, 84, 84, 87],
[48, 46, 61, 47, 49, 41,41, 67, 78, 83, 98, 87],
[69, 52, 41, 44, 41, 52,46, 71, 63, 84, 83, 91],
[50, 59, 44, 43, 27, 42,26, 64, 76, 65, 81, 86],
[47, 49, 66, 53, 50, 34,31, 79, 78, 79, 89, 95],
[61, 40, 62, 26, 34, 54,56, 74, 83, 78, 95, 98]
];

 let heatmap: HeatMap = new HeatMap({
    titleSettings: {
        text: 'Product wise Monthly sales revenue for a e-commerce website',
        textStyle: {
            size: '15px',
            fontWeight: '500',
            fontStyle: 'Normal',
            fontFamily: 'Segoe UI'
        }
    },
    xAxis: {
        labels: ['Laptop', 'Mobile', 'Gaming', 'Cosmetics', 'Fragnance', 'Watches', 'Handbags', 'Apparels',
            'Kitchenware', 'Furniture', 'Home Decor'],
        multiLevelLabels: [
            {
                textStyle: {
                    color: 'black',
                    fontWeight: 'Bold'
                },
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care'},
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]
    },
    yAxis: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        multiLevelLabels: [
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]
    },
    paletteSettings: {
        palette: [{ color: '#F0C27B' },
        { color: '#4B1248' }
        ],
    },
    dataSource: heatmapData
}); heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Border Customization

Using the border property, you can customize the width, color and type. The type of border are Rectangle, WithoutTopBorder, WithoutBottomBorder, WithoutTopAndBottomBorder, Brace, and WithoutBorder.

Source

Preview

app.ts

index.ts

index.html

import { HeatMap, Tooltip } from '@syncfusion/ej2-heatmap';
HeatMap.Inject(Tooltip);

let heatmapData: any [] = [
[52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91],
[68, 52, 63, 51, 30, 51,51, 81, 70, 60, 88, 80],
[60, 50, 42, 53, 66, 70,41, 69, 76, 74, 86, 97],
[66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92,84],
[65, 42, 58, 32, 36, 44,49, 79, 83, 69, 83, 93],
[54, 46, 61, 46, 40, 39,41, 69, 61, 84, 84, 87],
[48, 46, 61, 47, 49, 41,41, 67, 78, 83, 98, 87],
[69, 52, 41, 44, 41, 52,46, 71, 63, 84, 83, 91],
[50, 59, 44, 43, 27, 42,26, 64, 76, 65, 81, 86],
[47, 49, 66, 53, 50, 34,31, 79, 78, 79, 89, 95],
[61, 40, 62, 26, 34, 54,56, 74, 83, 78, 95, 98]
];

 let heatmap: HeatMap = new HeatMap({
    titleSettings: {
        text: 'Product wise Monthly sales revenue for a e-commerce website',
        textStyle: {
            size: '15px',
            fontWeight: '500',
            fontStyle: 'Normal',
            fontFamily: 'Segoe UI'
        }
    },
    xAxis: {
        labels: ['Laptop', 'Mobile', 'Gaming', 'Cosmetics', 'Fragnance', 'Watches', 'Handbags', 'Apparels','Kitchenware', 'Furniture', 'Home Decor'],
        multiLevelLabels: [
            {
                border: { type: 'Rectangle', color: '#a19d9d' },
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care'},
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]
    },
    yAxis: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        multiLevelLabels: [
            {
                border: { type: 'Brace', color: '#a19d9d' },
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]
    },
    paletteSettings: {
        palette: [{ color: '#F0C27B' },
        { color: '#4B1248' }
        ],
    },
    dataSource: heatmapData
}); heatmap.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 HeatMap</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>

Contents

Types
Category axis
Numeric axis
Date-time axis
Inversed axis
Opposed axis
Label formatting
Axis intervals
Axis label increment
Limiting labels in date-time axis
Multi Level Labels
Categories
Overflow
Alignment
Text Customization
Border Customization

Contents

Types
Category axis
Numeric axis
Date-time axis
Inversed axis
Opposed axis
Label formatting
Axis intervals
Axis label increment
Limiting labels in date-time axis
Multi Level Labels
Categories
Overflow
Alignment
Text Customization
Border Customization

Please provide additional information

Thank you for your feedback and comments.We will rectify this as soon as possible!

Axis in JavaScript HeatMap Chart control

Types

Category axis

Numeric axis

Date-time axis

Inversed axis

Opposed axis

Label formatting

Axis intervals

Axis label increment

Limiting labels in date-time axis

Multi Level Labels

Categories

Overflow

Alignment

Text Customization

Border Customization