JavaScript/jQuery Chart - 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.

The 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.
• valueText (for candle stick and stock series)
  Specifies a string of the values of the currently represented point. This string contains the highValueText, openValueText, closeValueText and lowValueText values.
  The format of the string is the following: "h: %highValueText% o: %openValueText% c: %closeValueText% l: %lowValueText%".
• valueText (for range area and range bar series)
  Specifies a string of the values of the currently represented point. This string contains the rangeValue1Text and rangeValue2Text values.
  The format of the string is the following: "%rangeValue1Text% - %rangeValue2Text%".
• 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.
• size (for bubble series only)
  Specifies the size of the bubble that is hovered over as it is set in the data source.
• 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 following fields come with the stacked-like series such as full-stacked bar or full-stacked area.

• percent
  Specifies the percent value of the currently hovered point.
• percentText
  Specifies the percent value of the currently hovered point with percentPrecision (optional) applied.
• total
  Specifies the total value of all the points with the same argument as the currently hovered point.
• totalText
  Specifies the total value of all the points with the same argument as the currently hovered point. This value is displayed with applied formatting if the format option is specified.

The following fields come with the range-like series, such as range area or range bar.

• originalMinValue
  Specifies the first range value of the currently hovered point as it is set in the data source.
• rangeValue1
  Specifies the first range value of the currently hovered point. Differs from the originalMinValue when the axis value type is specified explicitly. In this instance, the rangeValue1 field contains the first range value in the specified type.
• rangeValue1Text
  Specifies the first range value of the currently hovered point with applied formatting if the format property is specified.
• originalValue
  Specifies the second range value of the currently hovered point as it is set in the data source.
• rangeValue2
  Specifies the second range value of the currently hovered point. Differs from the originalValue when the axis value type is specified explicitly. In this instance, the rangeValue2 field contains the second range value in the specified type.
• rangeValue2Text
  Specifies the second range value of the currently hovered point with applied formatting if the format property is specified.

The following fields come with financial chart series, such as candle stick or stock.

• originalOpenValue
  Specifies the open value of the currently hovered point as it is set in the data source.
• openValue
  Specifies the open value of the currently hovered point. Differs from the originalOpenValue when the value in the data source is not in a numeric format.
• openValueText
  Specifies the open value of the currently hovered point with applied formatting if the format option is specified.
• originalCloseValue
  Specifies the close value of the currently hovered point as it is set in the data source.
• closeValue
  Specifies the close value of the currently hovered point. Differs from the originalCloseValue when the value in the data source is not in a numeric format.
• closeValueText
  Specifies the close value of the currently hovered point with applied formatting if the format option is specified.
• originalHighValue
  Specifies the high value of the currently hovered point as it is set in the data source.
• highValue
  Specifies the high value of the currently hovered point. Differs from the originalHighValue when the value in the data source is not in a numeric format.
• highValueText
  Specifies the high value of the currently hovered point with applied formatting if the format option is specified.
• originalLowValue
  Specifies the low value of the currently hovered point as it is set in the data source.
• lowValue
  Specifies the low value of the currently hovered point. Differs from the originalLowValue when the value in the data source is not in a numeric format.
• lowValueText
  Specifies the low value of the currently hovered point with applied formatting if the format option is specified.
• reductionValue
  Specifies the reduction value of the currently hovered point.
• reductionValueText
  Specifies the reduction value of the currently hovered point with applied formatting if the format option is specified.

Display a Tooltip Demo Tooltip HTML Support Demo

See Also

• Data Formatting

See the format section for details on accepted values.

See Also

• Data Formatting

Use the ChartTooltipLocation enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Center and Edge.

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.