Attribute	Type	Description
alpha	Number	Sets the alpha value of the heatmap overlay. Set between 0 (fully transparent) and 1 (fully opaque). Default Value: 0.5 Introduced in: v2.8.6 Chart types: Heatmap-plugin
async	Boolean	Forces the heatmap to paint the data in async mode (in batches) to avoid blocking the browser. Default Value: false Introduced in: v2.8.6 Chart types: Heatmap-plugin
blur	Number	Sets the amount of blur that appears around each shape. Increasing this will increase the amount of surface area each shape takes up. Introduced in: v2.8.6 Chart types: Heatmap-plugin
brushType brush-type	String	Sets the shape the heatmap is painted with Accepted Values: ['circle', 'square', 'rectangle'] Default Value: 'circle' Introduced in: v2.8.6 Chart types: Heatmap-plugin
composite	Boolean	Sets whether to blend shapes together for the classic heatmap look (the color shifts more towards red where a greater number of stacked shapes are present) Introduced in: v2.8.6 Chart types: Heatmap-plugin
gradientColors gradient-colors	String	Sets the colors to use for the gradient Default Value: ['#0000ff', '#00ffff', '#bfff00', '#ffff00', '#ff0000'] Introduced in: v2.8.6 Chart types: Heatmap-plugin
gradientStops gradient-stops	String	Sets where each gradient stop (ie transition to another color) should be Default Value: [0.4, 0.6, 0.7, 0.8, 1.0] Introduced in: v2.8.6 Chart types: Heatmap-plugin
graph	Boolean, Object	Sets the configuration for a graph. Set to true to create a scatter-heatmap chart. Use with `brushType`, `gradientColors`, and `gradientStops` to add heatmap features to scatter chart. Set to object to configure graph. Default Value: false Chart types: Heatmap-plugin,Scatter Heatmap
maxValue max-value	Number	Sets a maximum value. Introduced in: v2.8.6 Chart types: Heatmap-plugin
minValue min-value	Number	Sets a minimum value. Introduced in: v2.8.6 Chart types: Heatmap-plugin
placement	String	Sets the position of the heatmap layer in the chart's layer hierarchy (top\|bottom). Accepted Values: ['top', 'bottom'] Introduced in: v2.8.6 Chart types: Heatmap-plugin
size	Array.<Number>, Number	Modifies how large each painted shape is. Enter one value as a string or two values as an array of strings. Introduced in: v2.8.6 Chart types: Heatmap-plugin
sortData sort-data	Boolean	Sets whether the data is sorted by value (which will also affect the order of paint). Introduced in: v2.8.6 Chart types: Heatmap-plugin
tooltip	Object	Configures the tooltip element, which appears when hovering over an object. Introduced in: v2.8.6 Chart types: Heatmap-plugin