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Heatmap API

API reference docs for the React Heatmap component. Learn about the props, CSS, and other APIs of this exported module.

Demos

Import

import { Heatmap } from '@mui/x-charts-pro/Heatmap';
// or
import { Heatmap } from '@mui/x-charts-pro';

Learn about the difference by reading this guide on minimizing bundle size.

Props

NameTypeDefaultDescription
series*Array<object>-

The series to display in the bar chart. An array of HeatmapSeriesType objects.

xAxis*Array<{ barGapRatio?: number, categoryGapRatio?: number, classes?: object, colorMap?: { colors: Array<string>, type: 'ordinal', unknownColor?: string, values?: Array<Date
| number
| string> }
| { color: Array<string>
| func, max?: Date
| number, min?: Date
| number, type: 'continuous' }
| { colors: Array<string>, thresholds: Array<Date
| number>, type: 'piecewise' }, data?: array, dataKey?: string, disableLine?: bool, disableTicks?: bool, fill?: string, hideTooltip?: bool, id?: number
| string, label?: string, labelFontSize?: number, labelStyle?: object, max?: Date
| number, min?: Date
| number, position?: 'bottom'
| 'top', reverse?: bool, scaleType?: 'band', slotProps?: object, slots?: object, stroke?: string, sx?: Array<func
| object
| bool>
| func
| object, tickFontSize?: number, tickInterval?: 'auto'
| array
| func, tickLabelInterval?: 'auto'
| func, tickLabelPlacement?: 'middle'
| 'tick', tickLabelStyle?: object, tickMaxStep?: number, tickMinStep?: number, tickNumber?: number, tickPlacement?: 'end'
| 'extremities'
| 'middle'
| 'start', tickSize?: number, valueFormatter?: func, zoom?: { filterMode?: 'discard'
| 'keep', maxEnd?: number, maxSpan?: number, minSpan?: number, minStart?: number, panning?: bool, step?: number }
| bool }>
-

The configuration of the x-axes. If not provided, a default axis config is used. An array of AxisConfig objects.

yAxis*Array<{ barGapRatio?: number, categoryGapRatio?: number, classes?: object, colorMap?: { colors: Array<string>, type: 'ordinal', unknownColor?: string, values?: Array<Date
| number
| string> }
| { color: Array<string>
| func, max?: Date
| number, min?: Date
| number, type: 'continuous' }
| { colors: Array<string>, thresholds: Array<Date
| number>, type: 'piecewise' }, data?: array, dataKey?: string, disableLine?: bool, disableTicks?: bool, fill?: string, hideTooltip?: bool, id?: number
| string, label?: string, labelFontSize?: number, labelStyle?: object, max?: Date
| number, min?: Date
| number, position?: 'left'
| 'right', reverse?: bool, scaleType?: 'band', slotProps?: object, slots?: object, stroke?: string, sx?: Array<func
| object
| bool>
| func
| object, tickFontSize?: number, tickInterval?: 'auto'
| array
| func, tickLabelInterval?: 'auto'
| func, tickLabelPlacement?: 'middle'
| 'tick', tickLabelStyle?: object, tickMaxStep?: number, tickMinStep?: number, tickNumber?: number, tickPlacement?: 'end'
| 'extremities'
| 'middle'
| 'start', tickSize?: number, valueFormatter?: func, zoom?: { filterMode?: 'discard'
| 'keep', maxEnd?: number, maxSpan?: number, minSpan?: number, minStart?: number, panning?: bool, step?: number }
| bool }>
-

The configuration of the y-axes. If not provided, a default axis config is used. An array of AxisConfig objects.

bottomAxisobject
| string
xAxisIds[0] The id of the first provided axis

Indicate which axis to display the bottom of the charts. Can be a string (the id of the axis) or an object ChartsXAxisProps.

colorsArray<string>
| func
blueberryTwilightPalette

Color palette used to colorize multiple series.

datasetArray<object>-

An array of objects that can be used to populate series and axes data using their dataKey property.

disableAxisListenerboolfalse

If true, the charts will not listen to the mouse move event. It might break interactive features, but will improve performance.

heightnumber-

The height of the chart in px. If not defined, it takes the height of the parent element.

highlightedItem{ dataIndex?: number, seriesId?: number
| string }
-

The item currently highlighted. Turns highlighting into a controlled prop.

leftAxisobject
| string
yAxisIds[0] The id of the first provided axis

Indicate which axis to display the left of the charts. Can be a string (the id of the axis) or an object ChartsYAxisProps.

loadingboolfalse

If true, a loading overlay is displayed.

margin{ bottom?: number, left?: number, right?: number, top?: number }object Depends on the charts type.

The margin between the SVG and the drawing area. It's used for leaving some space for extra information such as the x- and y-axis or legend. Accepts an object with the optional properties: top, bottom, left, and right.

onAxisClickfunc-

The function called for onClick events. The second argument contains information about all line/bar elements at the current mouse position.

Signature:function(event: MouseEvent, data: null | AxisData) => void
  • event The mouse event recorded on the <svg/> element.
  • data The data about the clicked axis and items associated with it.
onHighlightChangefunc-

The callback fired when the highlighted item changes.

Signature:function(highlightedItem: HighlightItemData | null) => void
  • highlightedItem The newly highlighted item.
rightAxisobject
| string
null

Indicate which axis to display the right of the charts. Can be a string (the id of the axis) or an object ChartsYAxisProps.

slotPropsobject{}

The props used for each component slot.

slotsobject{}

Overridable component slots.

See Slots API below for more details.

tooltip{ axisContent?: elementType, classes?: object, itemContent?: elementType, slotProps?: object, slots?: object, trigger?: 'axis'
| 'item'
| 'none' }
-

The configuration of the tooltip.

See tooltip docs for more details.

topAxisobject
| string
null

Indicate which axis to display the top of the charts. Can be a string (the id of the axis) or an object ChartsXAxisProps.

widthnumber-

The width of the chart in px. If not defined, it takes the width of the parent element.

zAxisArray<{ colorMap?: { colors: Array<string>, type: 'ordinal', unknownColor?: string, values?: Array<Date
| number
| string> }
| { color: Array<string>
| func, max?: Date
| number, min?: Date
| number, type: 'continuous' }
| { colors: Array<string>, thresholds: Array<Date
| number>, type: 'piecewise' }, data?: array, dataKey?: string, id?: string, max?: number, min?: number }>
-

The configuration of the z-axes.

The component cannot hold a ref.

CSS classes

These class names are useful for styling with CSS. They are applied to the component's slots when specific states are triggered.

Class nameRule nameDescription
.MuiHeatmap-cellcellStyles applied to the heatmap cells.
.MuiHeatmap-fadedfadedStyles applied to the cell element if faded.
.MuiHeatmap-highlightedhighlightedStyles applied to the cell element if highlighted.

You can override the style of the component using one of these customization options:

Source code

If you did not find the information in this page, consider having a look at the implementation of the component for more detail.