React PolarChart - tooltip

A tooltip is a miniature rectangle displaying values of a series point. A tooltip appears when the end-user hovers the cursor over a series point. You can enable/disable tooltips, change their appearance and format their text using fields of the tooltip configuration object.

See Also

• format - provides a comprehensive overview of formatting capabilities.
• Data Formatting - shows how to apply formatting to various widget elements.

This option supports the following colors:

• Hexadecimal colors
• RGB colors
• RGBA colors
• Predefined/cross-browser color names
• Predefined SVG colors

This option sets one color for all tooltips. You can specify a particular tooltip's color in the tooltip.customizeTooltip function.

The following table demonstrates how the corner's curvature depends on the cornerRadius value:

cornerRadius	Result
cornerRadius: 0
cornerRadius: 15
cornerRadius: 35

This option should be assigned a function returning a specific object. The following fields can be specified in this object.

• color
  Specifies the color of a tooltip.

• text
  Specifies the text displayed by a tooltip.

• html
  Specifies the HTML markup displayed by a tooltip.

  NOTE

  If you are going to use external resources (for example, images) in the markup, specify the size of the area they will occupy beforehand.

• fontColor
  Specifies the color of the text displayed by a tooltip.

• borderColor
  Specifies the color of the tooltip border.

This function's parameter has the following fields:

• originalValue
  Specifies the value of the currently represented point as it is set in the data source.
• value
  Specifies the value of the currently represented point. Differs from the originalValue when the axis value type is specified explicitly. In this instance, the value field contains a value in the specified type.
• valueText
  Specifies the value of the currently hovered point with applied formatting if the format property is specified.
• originalArgument
  Specifies the argument value of the currently represented point as it is set in the data source.
• argument
  Specifies the argument value of the currently represented point. Differs from the originalArgument when the axis' argument type differs from the argument type in the data source. In this instance, argument has the type of the argument axis.
• argumentText
  Specifies the argument value of the currently hovered point with applied formatting if the argumentFormat option is specified.
• seriesName
  Specifies the series of the currently hovered point.
• point
  Provides access to the hovered point. To learn more about the field and methods of the point object, refer to the Point topic in the "Chart Elements" reference section.
• points (for shared tooltip only)
  Provides access to the array of points with the same argument as the currently hovered point. This field is accessible when the shared option of the tooltip object is set to true. To learn more about the fields and methods of the point object, refer to the Point topic in the "Chart Elements" reference section. The function's parameter represents the same object as the this object. If appropriate, you can use the function's parameter to obtain the value that is currently represented by a tooltip.

See Also

• Data Formatting

See the format section for details on accepted values.

See Also

• Data Formatting

This option accepts a value from 0 to 1, where 0 makes tooltips completely transparent, and 1 makes them opaque.

By default, a tooltip displays information about the currently hovered series point. If you set the shared option to true, the tooltip will display information about all the points that have the same argument as the hovered point at once.

If the text displayed in the tooltip by default doesn't suit your needs, you can customize it using the customizeTooltip option.

If the widget's container has the CSS z-index property specified, and tooltips are displayed incorrectly, configure their z-index using this option.