Axis API in JavaScript Chart API control

The Axis class configures the axes in the chart. It provides various properties to customize the appearance and behavior of chart axes, including settings for labels, grid lines, ticks, and more.

Properties

border

LabelBorderModel

Configures the appearance of the border around multi-level labels, including the color, width, and type of the border.

coefficient

number

The coefficient value adjusts the size of the polar radar chart’s radius. A higher value increases the radius size, while a smaller value decreases it.

Defaults to 100

columnIndex

number

Specifies the index of the column where the axis is associated when the chart area is divided into multiple plot areas using columns.

<div id='Chart'></div>

let chart: Chart = new Chart({
...
    columns: [{ width: '50%' },
              { width: '50%' }],
    axes: [{
               name: 'xAxis 1',
               columnIndex: 1
    }],
...
});
chart.appendTo('#Chart');

Defaults to 0

crossesAt

Object

Specifies the value at which the axis line intersects with the vertical axis or vice versa.

Defaults to null

crossesInAxis

string

Specifies the name of the axis with which the axis line should intersect.

Defaults to null

crosshairTooltip

CrosshairTooltipModel

Options to customize the appearance and behavior of the crosshair tooltip that appears when hovering over the chart.

description

string

A description for the axis that provides additional information about its content for screen readers.

Defaults to null

desiredIntervals

number

The desiredIntervals property allows the axis to calculate intervals that are roughly equal to the specified number, promoting a more readable and evenly spaced axis.

Defaults to null

edgeLabelPlacement

EdgeLabelPlacement

The edgeLabelPlacement property ensures that labels positioned at the edges of the axis do not overlap with the axis boundaries or other chart elements, offering several options to improve chart readability by managing edge labels effectively. Available options are:

• None: No action will be performed on edge labels.
• Hide: Edge labels will be hidden to prevent overlap.
• Shift: Edge labels will be shifted to fit within the axis bounds without overlapping.

Defaults to ‘Shift’

enableAutoIntervalOnZooming

boolean

If set to true, the axis interval will be calculated automatically based on the zoomed range.

Defaults to true

enableScrollbarOnZooming

boolean

If set to true, a scrollbar will appear while zooming to help navigate through the zoomed content.

Defaults to true

enableTrim

boolean

If set to true, axis labels will be trimmed based on the maximumLabelWidth.

Defaults to false

enableWrap

boolean

Specifies whether the axis labels should be wrapped based on the specified maximumLabelWidth. When set to true, the axis labels will automatically wrap to fit within the available width defined by maximumLabelWidth.

Defaults to false

interval

number

Specifies the interval for the axis.

Defaults to null

intervalType

IntervalType

The intervalType property defines how the intervals on a date-time axis are calculated and displayed. Available options are:

• Auto: Automatically determines the interval type based on the data and chart settings.
• Years: Sets the interval of the axis in years.
• Months: Sets the interval of the axis in months.
• Days: Sets the interval of the axis in days.
• Hours: Sets the interval of the axis in hours.
• Minutes: Sets the interval of the axis in minutes.

Defaults to ‘Auto’

isIndexed

boolean

If set to true, data points are rendered based on their index.

Defaults to false

isInversed

boolean

If set to true, the axis will be rendered in an inversed manner.

Defaults to false

labelFormat

string

Used to format the axis label. This property accepts global string formats such as C, n1, P, etc. It also accepts placeholders like {value}°C, where {value} represents the axis label (e.g., 20°C).

Defaults to ”

labelIntersectAction

LabelIntersectAction

Specifies the action to take when axis labels intersect with each other. The available options are:

• None: Shows all labels without any modification.
• Hide: Hides the label if it intersects with another label.
• Trim: Trims the label text to fit within the available space.
• Wrap: Wraps the label text to fit within the available space.
• MultipleRows: Displays the label text in multiple rows to avoid intersection.
• Rotate45: Rotates the label text by 45 degrees to avoid intersection.
• Rotate90: Rotates the label text by 90 degrees to avoid intersection.

Defaults to Trim

labelPadding

number

The labelPadding property adjusts the distance to ensure a clear space between the axis labels and the axis line.

Defaults to 5

labelPlacement

LabelPlacement

The labelPlacement property controls where the category axis labels are rendered in relation to the axis ticks. Available options are:

• BetweenTicks: Renders the label between the axis ticks.
• OnTicks: Renders the label directly on the axis ticks.

Defaults to ‘BetweenTicks’

labelPosition

AxisPosition

The labelPosition property determines where the axis labels are rendered in relation to the axis line. Available options are:

• Inside: Renders the labels inside the axis line.
• Outside: Renders the labels outside the axis line.

Defaults to ‘Outside’

labelRotation

number

The angle to which the axis label gets rotated.

Defaults to 0

labelStyle

FontModel

This property allows defining various font settings to control how the labels are displayed on the axis.

lineBreakAlignment

TextAlignment

Determines the alignment of labels when a line break occurs in the axis labels.

Defaults to ‘Center’

lineStyle

AxisLineModel

Options for customizing the axis lines.

logBase

number

Specifies the base value for a logarithmic axis.

Note that valueType must be set to Logarithmic for this feature to work.

Defaults to 10

majorGridLines

MajorGridLinesModel

Options for customizing major grid lines on the axis.

majorTickLines

MajorTickLinesModel

Options for customizing major tick lines on the axis.

maximum

Object

Specifies the maximum value of the axis range, which sets the upper bound of the axis and defines the largest value displayed on the chart, helping to control the visible range of data.

Defaults to null

maximumLabelWidth

number

Specifies the maximum width of an axis label.

Defaults to 34.

maximumLabels

number

Specifies the maximum number of labels per 100 pixels relative to the axis length.

Defaults to 3

minimum

Object

Specifies the minimum value of the axis range, which sets the lower bound of the axis and defines the smallest value that will be displayed on the chart to control the visible range of data.

Defaults to null

minorGridLines

MinorGridLinesModel

Options for customizing minor grid lines on the axis.

minorTickLines

MinorTickLinesModel

Options for customizing minor tick lines on the axis.

minorTicksPerInterval

number

Specifies the number of minor ticks per interval.

Defaults to 0

multiLevelLabels

MultiLevelLabelsModel[]

Multi-level labels are used to display hierarchical or grouped labels on the axis, allowing for a more detailed and structured data representation.

name

string

A unique identifier for an axis. To associate an axis with a series, set this name to the xAxisName or yAxisName properties of the series.

Defaults to ”

opposedPosition

boolean

If set to true, the axis will render on the opposite side of its default position.

Defaults to false

placeNextToAxisLine

boolean

Specifies whether axis elements, such as axis labels and the axis title, should be crossed by the axis line.

Defaults to true

plotOffset

number

Specifies the padding on the top, bottom, left and right sides of the chart area, in pixels.

Defaults to 0

plotOffsetBottom

number

Specifies the bottom padding for the chart area, in pixels.

Defaults to null

plotOffsetLeft

number

Specifies the left padding for the chart area, in pixels.

Defaults to null

plotOffsetRight

number

Specifies the right padding for the chart area, in pixels.

Defaults to null

plotOffsetTop

number

Specifies the top padding for the chart area, in pixels.

Defaults to null

rangePadding

ChartRangePadding

The rangePadding property determines how padding is applied to the axis range, affecting the appearance of the chart by adjusting the minimum and maximum values of the axis. Available options are:

• None: No padding is applied to the axis.
• Normal: Padding is applied based on the range calculation.
• Additional: The interval of the axis is added as padding to both the minimum and maximum values of the range.
• Round: The axis range is rounded to the nearest possible value that is divisible by the interval.

Defaults to ‘Auto’

rowIndex

number

Specifies the index of the row where the axis is associated when the chart area is divided into multiple plot areas using rows.

<div id='Chart'></div>

let chart: Chart = new Chart({
...
    rows: [{ height: '50%' },
           { height: '50%' }],
    axes: [{
               name: 'yAxis 1',
               rowIndex: 1
     }],
...
});
chart.appendTo('#Chart');

Defaults to 0

scrollbarSettings

ScrollbarSettingsModel

Configures the scrollbar with options for customization, including appearance, behavior, and lazy loading settings.

skeleton

string

Specifies the skeleton format used for processing date-time values.

Defaults to ”

skeletonType

SkeletonType

Specifies the format type to be used in date-time formatting.

Defaults to ‘DateTime’

span

number

Specifies the number of columns or rows that an axis spans horizontally or vertically.

Defaults to 1

startAngle

number

Specifies the start angle for the series in a polar or radar chart, measured in degrees from the horizontal axis, determining the initial angle from which the series begins.

Defaults to 0

startFromZero

boolean

If set to true, the axis starts from zero. If set to false, the axis starts from the minimum value of the data.

Defaults to true

stripLines

StripLineSettingsModel[]

Specifies the collection of strip lines for the axis, which are visual elements used to mark or highlight specific ranges.

tabIndex

number

The tabIndex value for the axis, determining its position in the tab order.

Defaults to 2

tickPosition

AxisPosition

The tickPosition property determines where the axis ticks are rendered in relation to the axis line. Available options are:

• Inside: Renders the ticks inside the axis line.
• Outside: Renders the ticks outside the axis line.

Defaults to ‘Outside’

title

string

Specifies the title of an axis, displayed along the axis to provide context about the represented data.

Defaults to ”

titlePadding

number

Specifies the padding between the axis title and the axis labels.

Defaults to 5

titleRotation

number

Defines an angle for rotating the axis title. By default, the angle is calculated based on the position and orientation of the axis.

Defaults to null

titleStyle

FontModel

Options for customizing the appearance of the axis title, including font family, size, style, weight, and color.

valueType

ValueType

The valueType property defines the type of data that the axis can manage, ensuring correct rendering based on the data type. This property supports multiple data types, each suited for different kinds of data visualization. Available options include:

• Double: Used for rendering a numeric axis to accommodate numeric data.
• DateTime: Utilized for rendering a date-time axis to manage date-time data.
• Category: Employed for rendering a category axis to manage categorical data.
• Logarithmic: Applied for rendering a logarithmic axis to handle a wide range of values.
• DateTimeCategory: Used to render a date-time category axis for managing business days.

Defaults to ‘Double’

visible

boolean

If set to true, axis labels will be visible in the chart. By default, axis labels are enabled.

Defaults to true

zoomFactor

number

The axis is scaled by this factor. When zoomFactor is 0.5, the chart is scaled by 200% along this axis.

Note the value ranges from 0 to 1.

Defaults to 1

zoomPosition

number

Sets the position of the zoomed axis on the chart, with the zoomPosition property specifying the position within the zoomed range, from 0 (start) to 1 (end).

Defaults to 0