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Getting started with React HeatMap Chart component

30 Jul 2021 / 10 minutes to read

This section explains the steps required to create a heat map and demonstrates the basic usage of the heat map control.

Dependencies

For using heat map, the following minimum requirements are needed.

|-- @syncfusion/ej2-react-heatmap
    |-- @syncfusion/ej2-heatmap
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-data
    |-- @syncfusion/ej2-svg-base
    |-- @syncfusion/ej2-react-base

Installation and configuration

You can use create-react-app to setup the applications. To install create-react-app run the following command.

npm install -g create-react-app

To setup basic React sample use following commands.

create-react-app quickstart --scripts-version=react-scripts-ts

cd quickstart

npm install

create-react-app quickstart

cd quickstart

Install Syncfusion packages using below command.

npm install @syncfusion/ej2-react-heatmap --save

Adding heat map to the project

Now, you can start adding HeatMap component in the application. For getting started, add the HeatMap component in src/App.tsx file using following code.

import * as React from 'react';
import { HeatMapComponent } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
render() {
  return ( <HeatMapComponent></HeatMapComponent> );
 }
}
export default App;

import * as React from 'react';
import { HeatMapComponent } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    render() {
        return (<HeatMapComponent></HeatMapComponent>);
    }
}
export default App;

Use the npm start command to run the application in the browser.

npm start

The below example shows a basic HeatMap.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from "react-dom";
import { HeatMapComponent} from '@syncfusion/ej2-react-heatmap';
ReactDOM.render(<HeatMapComponent id='heatmap'></HeatMapComponent>, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from "react-dom";
import { HeatMapComponent } from '@syncfusion/ej2-react-heatmap';
ReactDOM.render(<HeatMapComponent id='heatmap'></HeatMapComponent>, document.getElementById('heatmap'));

Module injection

The heat map components are segregated into individual feature-wise modules. To use its feature, you need to inject its feature service in the AppModule. In the current application,the basic heat map is modified to visualize sales revenue data for week, and the tooltip and legend features of the heat map are used. Find the relevant feature modules and descriptions as follows.

Legend - Provides the legend feature by injecting it.
Tooltip - Provides the tooltip feature by injecting it.

Now, import the above-mentioned modules from the heat map package and inject them into services.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { HeatMapComponent, Inject, Legend, Tooltip} from '@syncfusion/ej2-react-heatmap';

ReactDOM.render(<HeatMapComponent id='heatmap'></HeatMapComponent>,
<Inject services={[Legend, Tooltip]}/>
document.getElementById('heatmap'));

Populate heat map with data

This section explains how to populate the following two-dimensional array data to the heat map.

Source

Preview

index.tsx

index.jsx

import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
import * as ReactDOM from "react-dom";
import * as React from "react";

class App extends React.Component {
private 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]];
public render() {
return ( <HeatMapComponent id='heatmap'
        dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
import * as ReactDOM from "react-dom";
import * as React from "react";
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Enable axis labels

You can add axis labels to the heat map and format those labels using the xAxis and yAxis properties. Axis labels provide additional information about the data points populated in the heat map.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        xAxis = { {
            labels : ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario'],
        } }
        yAxis = { {
            labels : ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario'],
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Add heat map title

Add a title using the titleSettings property to the heat map to provide quick information to the user about the data populated in the heat map.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        titleSettings = { {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        } }
        xAxis = { {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        } }
        yAxis = { {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' titleSettings={{
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        }} xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} dataSource={this.heatmapData}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Enable legend

Use a legend for the heat map in the legendSettings object by setting the visible property to true and injecting the Legend module into the services.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        titleSettings = { {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        } }
        xAxis = { {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        } }
        yAxis = { {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        dataSource={this.heatmapData}
        legendSettings = { {
            visible:true,
            position: 'Right',
            showLabel: true,
            height: "150"
        } }>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> )
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' titleSettings={{
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        }} xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} dataSource={this.heatmapData} legendSettings={{
            visible: true,
            position: 'Right',
            showLabel: true,
            height: "150"
        }}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Add data label

Add data labels to improve the readability of the heat map. This can be achieved by setting the showLabel property to true in the cellSettings object.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        titleSettings= { {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        } }
        xAxis = { {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        } }
        yAxis = { {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        cellSettings = { {
            showLabel: true,
        } }
        dataSource={this.heatmapData}
        legendSettings = { {
            position: 'Right',
            showLabel: true,
            height: "150"
        } }>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' titleSettings={{
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        }} xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} cellSettings={{
            showLabel: true,
        }} dataSource={this.heatmapData} legendSettings={{
            position: 'Right',
            showLabel: true,
            height: "150"
        }}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Add custom cell palette

The default palette settings of the heat map cells can be customized by using the paletteSettings property. Using the palette property in paletteSettings object, you can change the color set for the cells. You can change the color mode of the cells to fixed or gradient mode using the type property.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        titleSettings = { {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        } }
        xAxis = { {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        } }
        yAxis = { {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        cellSettings = { {
            showLabel: true,
        } }
        paletteSettings = { {
            palette: [
                { value: 0, color: '#C06C84' },
                { value: 50, color: '#6C5B7B' },
                { value: 100, color: '#355C7D' }
            ],
            type: "Gradient"
        } }
        dataSource={this.heatmapData}
        legendSettings = { {
            position: 'Right',
            showLabel: true,
            height: "150"
        } }>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' titleSettings={{
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        }} xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} cellSettings={{
            showLabel: true,
        }} paletteSettings={{
            palette: [
                { value: 0, color: '#C06C84' },
                { value: 50, color: '#6C5B7B' },
                { value: 100, color: '#355C7D' }
            ],
            type: "Gradient"
        }} dataSource={this.heatmapData} legendSettings={{
            position: 'Right',
            showLabel: true,
            height: "150"
        }}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

The tooltip is used when you cannot display information by using the data labels due to space constraints. You can enable the tooltip by setting the showTooltip property to true and injecting the Tooltip module into the services.

Source

Preview

index.tsx

index.jsx

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';

class App extends React.Component {
private 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]];
render() {
return ( <HeatMapComponent id='heatmap'
        titleSettings = { {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        } }
        xAxis = { {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
            'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        } }
        yAxis = { {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        } }
        cellSettings = { {
            showLabel: true,
        } }
        dataSource={this.heatmapData}
        showTooltip={true}
        legendSettings = { {
            visible:true,
            position: 'Right',
            showLabel: true,
            height: "150"
        } }>
        <Inject services={[Legend, Tooltip]} />
        </HeatMapComponent> );
}
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

import * as React from "react";
import * as ReactDOM from 'react-dom';
import { HeatMapComponent, Inject, Legend, Tooltip } from '@syncfusion/ej2-react-heatmap';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.heatmapData = [
            [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]
        ];
    }
    render() {
        return (<HeatMapComponent id='heatmap' titleSettings={{
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        }} xAxis={{
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven', 'Michael', 'Robert',
                'Laura', 'Anne', 'Paul', 'Karin', 'Mario']
        }} yAxis={{
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'],
        }} cellSettings={{
            showLabel: true,
        }} dataSource={this.heatmapData} showTooltip={true} legendSettings={{
            visible: true,
            position: 'Right',
            showLabel: true,
            height: "150"
        }}>
        <Inject services={[Legend, Tooltip]}/>
        </HeatMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('heatmap'));

Contents

Dependencies
Installation and configuration
Adding heat map to the project
Module injection
Populate heat map with data
Enable axis labels
Add heat map title
Enable legend
Add data label
Add custom cell palette
Enable tooltip

Contents

Dependencies
Installation and configuration
Adding heat map to the project
Module injection
Populate heat map with data
Enable axis labels
Add heat map title
Enable legend
Add data label
Add custom cell palette
Enable tooltip

Getting started with React HeatMap Chart component

Dependencies

Installation and configuration

Adding heat map to the project

Module injection

Populate heat map with data

Enable axis labels

Add heat map title

Enable legend

Add data label

Add custom cell palette

Enable tooltip