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tooltip

Configures tooltips.

Type:

Object

A tooltip is a miniature rectangle displaying data of an area or a marker. A tooltip appears when the end-user hovers the cursor over an area or a marker. To show tooltips, do the following.

  • Enable tooltips.
    Set the enabled option to true.

  • Specify text to be displayed in tooltips. Specify the customizeTooltip option.

You can also change the appearance of tooltips using fields of the tooltip configuration object.

View Demo

arrowLength

Specifies the length of a tooltip's arrow in pixels.

Type:

Number

Default Value: 10

border

Configures a tooltip's border.

Type:

Object

color

Colors all tooltips.

Type:

String

Default Value: '#ffffff'

This option supports the following colors:

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

container

Specifies the container in which to draw tooltips. The default container is the HTML DOM <body> element.

Type:

String

|

DOM Node

|

jQuery

Default Value: undefined

contentComponent

An alias for the contentTemplate option specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.

contentRender

An alias for the contentTemplate option specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.

contentTemplate

Specifies a custom template for a tooltip.

Type:

template

Function parameters:
info:

Layer Element

Information on the area or marker being pressed or hovered over. To distinguish between areas and markers, use the info.layer.type field.

element:

Element (jQuery or HTML)

The tooltip's container. It is an HTML Element or a jQuery Element when you use jQuery.

Return Value:

String

|

DOM Node

|

jQuery

One of the following:

  • HTML markup as a string
  • A DOM node
  • A DOM node wrapped in a jQuery element
Default Value: undefined

View Demo

cornerRadius

Makes all the tooltip's corners rounded.

Type:

Number

Default Value: 0, 4 (Material)

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

cornerRadius Result
cornerRadius: 0 DevExtreme Chart: tooltip with cornerRadius set to 0
cornerRadius: 15 DevExtreme Chart: tooltip with cornerRadius set to 15
cornerRadius: 35 DevExtreme Chart: tooltip with cornerRadius set to 35

customizeTooltip

Specifies text and appearance of a set of tooltips.

Type:

Function

Function parameters:
info:

Layer Element

Information on the area or marker being pressed or hovered over with the mouse pointer.

Return Value:

Object

The tooltip's text or markup and color.

Default Value: undefined
Cannot be used in themes.

This option should be assigned a function that returns an object with the following fields:

Field name Description
text The tooltip's text.
html The HTML markup displayed in a tooltip. To use external resources (for example, images) in the markup, specify the size of the area they occupy beforehand.
color The tooltip's color.
fontColor The color of the tooltip's text.
borderColor The color of the tooltip's border.

NOTE
The tooltip is displayed only if text or html is specified.
NOTE
As an alternative to the function’s parameter you can use the this keyword.

Colors Customization Demo Tooltip HTML Support Demo

enabled

Enables tooltips.

Type:

Boolean

Default Value: false

font

Specifies tooltips' font options.

Type:

Object

opacity

Specifies tooltips' transparency.

Type:

Number

Default Value: undefined

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

paddingLeftRight

Generates an empty space, measured in pixels, between a tooltip's left/right border and its text.

Type:

Number

Default Value: 18

DevExtreme HTML5 JavaScript Funnel Tooltips Left-Right Padding

paddingTopBottom

Generates an empty space, measured in pixels, between a tooltip's top/bottom border and its text.

Type:

Number

Default Value: 15

DevExtreme HTML5 JavaScript Funnel Tooltips Top-Bottom Padding

shadow

Configures a tooltip's shadow.

Type:

Object

zIndex

Specifies a tooltip's z-index.

Type:

Number

Default Value: undefined

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