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Overview

The JavaScript HeatMap Chart is a graphical representation of two-dimensional data where values are represented with gradient or solid color variations. The data points are rendered as HeatMap cells using Scalable Vector Graphics (SVG) or canvas UI rendering.


Dealing with large data

Though the JavaScript HeatMap Chart can render data points using both SVG and canvas modes, it uses canvas rendering mode while displaying large volumes of data for the best initial load performance and optimized memory usage.


Data binding

The HeatMap Chart can be bound to data using JSON or an array of objects. JSON data can be local or remote, and it can be retrieved using different adaptors. The JSON data can be nested as well.

Data Binding in HeatMap Chart JavaScript


Selection in HeatMap Chart JavaScript

Selection

In the HeatMap Chart, the cell selection is used to select single or multiple cells at runtime. The selected cell details are obtained via the built-in event and can be used for external processing.


HeatMap Bubble Chart

The JavaScript Bubble HeatMap Chart or the matrix bubble chart, visualizes data using variations in bubble attributes such as size, color, and sector.

Bubble Chart in HeatMap JavaScript


Calendar HeatMap

The JavaScript Calendar HeatMap visualizes time series data with each data point representing a value bound to a specific time.


Axis

Populate data in the JavaScript HeatMap Chart using different axis types: numeric, category, and date-time.

Numeric axis

Use a numeric axis to represent numeric data in a JavaScript HeatMap.

Date-time axis

Use a date-time axis to represent time series data in a JavaScript HeatMap. Similarly, display dates and times as axis labels with different formats.

Category axis

Use a category axis to represent non-numerical data in a HeatMap and display text labels instead of numbers.


Customizable axis

The JavaScript HeatMap Chart allows you to customize axis elements to make an axis more readable.

JavaScript HeatMap with inversed origin or inversed axes

Inversed axis

Achieve RTL layout by reversing the axis labels. This swaps the higher and lower ranges of an axis.

JavaScript HeatMap with axes displayed in opposed position

Opposed position

Arrange the axes smartly by moving them to positions opposite to their default positions.

Axis intervals displayed in JavaScript HeatMap

Axis intervals

Set axis labels with regular intervals, hiding adjacent labels across all types of axes.

Label rotation of the JavaScript HeatMap axes

Axis label rotation

Rotate axis labels clockwise or counterclockwise to any desired angle.

Axes label formatting in JavaScript HeatMap

Axis label formatting

Customize the axis label text using the available formatting options.


HeatMap cell customization

JavaScript HeatMap can customize the default appearance of a cell or data point using the available formatting options.

Data labels in HeatMap JavaScript

Data label

Toggle visibility or format the data labels to display custom text along with the cell values.

JavaScript HeatMap cell with customized borders

Border

Change the borders and cell spacing by customizing the border settings.

JavaScript HeatMap Chart with data label template

Data label template

Render any HTML element as a label for the cells in the HeatMap.


Palette

Customize the default color settings of the HeatMap cells with gradient or solid custom colors.


Cell color range customization

Color ranges allow a color to be applied to specific ranges in HeatMap cells.

Cell color range customization in HeatMap Chart JavaScript


Legend

Display additional information about data points in the JavaScript HeatMap Chart using a legend.

JavaScript HeatMap with a gradient legend and list-type legend

Types

Choose between a gradient pointer and a list-type legend for improving data points readability.

Legend placement in JavaScript HeatMap

Positioning

Place the legend anywhere in the chart area to make it fit best on a page.

Legend paging enabled in JavaScript HeatMap

Paging

The control enables paging when legend items exceed the bounds. Then, each legend item can be viewed by navigating between the pages.

Legend title customization in JavaScript HeatMap Chart.

Legend title

A legend title provides information about the HeatMap legend.


Empty points

Handle missed or undefined data values with empty data points.

JavaScript HeatMap with empty data points


Selection

Select single or multiple cells using keyboard, mouse, and touch interactions.

Selection in HeatMap Chart JavaScript


Tooltip

Display additional information for the data points with tooltips on mouse hover.

Cell tooltip enabled in JavaScript HeatMap


Other supported frameworks

The HeatMap Chart component is also available in Blazor, React, Angular, and Vue frameworks. Check out the different HeatMap Chart platforms from the links below:


JavaScript HeatMap code example

Easily get started with the JavaScript HeatMap Chart using a few simple lines of HTML and TS code, as demonstrated below. Also explore our JavaScript HeatMap Chart Example that shows you how to render and configure the HeatMap Chart in JavaScript.

<body>
    <!--container which is going to render the HeatMap-->
    <div id='element'>
    </div>
</body>
import { HeatMap } from '@syncfusion/ej2-heatmap';

// initialize HeatMap control
let heatmap: HeatMap = new HeatMap();

// render initialized HeatMap
heatmap.appendTo('#element');



85+ JAVASCRIPT UI CONTROLS

Frequently Asked Questions

The HeatMap Chart in JavaScript Syncfusion provides the following features:

  • Display simple or large matrix data graphically.
  • Supports automatic switching between SVG and canvas rendering modes.
  • Legend provides value information for the colors that represent each value.
  • Analyze data patterns of the subject quickly with multiple views such as rectangle, bubble, calendar, and sector heatmaps.
  • One of the best JavaScript HeatMap Chart components on the market, offering a feature-rich UI.
  • Simple configuration and API.
  • Supports all modern browsers.
  • Touch-friendly and responsive.
  • Expansive learning resources such as demos and documentation help you get started quickly with JavaScript HeatMap Chart.

We do not sell the JavaScript HeatMap Chart separately. It is only available for purchase as part of the Syncfusion team license. This contains over 1,800 components and frameworks, including the JavaScript HeatMap Chart. The price of the team license starts at $395 per month for 5 developers, and includes support and updates until the subscription expires. In addition, we might offer discounts based on currently active promotions. Please contact our product specialists today to see if you qualify for any additional discounts.

You can find our JavaScript HeatMap Chart demo here It demonstrates how to render and configure the JavaScript HeatMap Chart.

No, our 1,800+ components and frameworks for web, mobile, and desktop, including our JavaScript HeatMap Chart, are not sold individually. They are only available as part of a team license. However, we have competitively priced the product, so it only costs a little bit more than what some other vendors charge for their HeatMap Chart control alone. We have also found that, in our experience, our customers usually start off using one of our products and then expand to several products quickly, so we felt it was best to offer all 1,800+ components and frameworks for a subscription fee that starts at $395 per month for a team of 5 developers. Additionally, we might be able to offer discounts based on currently active promotions. Please contact our product specialists today to see if you qualify for any additional discounts.

No, this is a commercial product and requires a paid license. However, a free Community License is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

A good place to start would be our comprehensive getting started documentation.

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