Axes

class BaseAxis extends BaseAttribute

https://www.chartjs.org/docs/2.7.3/axes/

BaseAxis inherits all the properties from BaseAttribute

Axes are an integral part of a chart. They are used to determine how data maps to a pixel value on the chart. In a cartesian chart, there is 1 or more X axis and 1 or more Y axis to map points onto the 2 dimensional canvas. These axes are know as 'cartesian axes'.

In a radial chart, such as a radar chart or a polar area chart, there is a single axis that maps points in the angular and radial directions. These are known as 'radial axes'.

Some characteristics of the axes in Chart.js 2 are:

• Multiple X & Y axes are supported.
• A built-in label auto-skip feature detects would-be overlapping ticks and labels and removes every nth label to keep things displaying normally.
• Scale titles are supported.
• New scale types can be extended without writing an entirely new chart type.

API

Attribute name	Type	Default	Description
display	boolean	string	true
weight	number	0	The weight used to sort the axis. Higher weights are further away from the chart area.
ticksCallback	function		Callback used for the ticks definition. Commonly used, for example, to change the tick marks in order to include information about the data type. Parameters: value, index, values. more...
callbackBeforeupdate	function		Callback called before the update process starts. Parameters: axis
callbackBeforesetdimensions	function		Callback that runs before dimensions are set. Parameters: axis
callbackAfterSetDimensions	function		Callback that runs after dimensions are set. Parameters: axis
callbackBeforedatalimits	function		Callback that runs before data limits are determined. Parameters: axis
callbackAfterdatalimits	function		Callback that runs after data limits are determined. Parameters: axis
callbackBeforebuildticks	function		Callback that runs before ticks are created. Parameters: axis
callbackAfterbuildticks	function		Callback that runs after ticks are created. Useful for filtering ticks. Should return the filtered ticks. Parameters: axis, ticks
callbackBeforeticktolabelconversion	function		Callback that runs before ticks are converted into strings. Parameters: axis
callbackAfterticktolabelconversion	function		Callback that runs after ticks are converted into strings. Parameters: axis
callbackBeforecalculatetickrotation	function		Callback that runs before tick rotation is determined. Parameters: axis
callbackAftercalculatetickrotation	function		Callback that runs after tick rotation is determined. Parameters: axis
callbackBeforefit	function		Callback that runs before the scale fits to the canvas. Parameters: axis
callbackAfterfit	function		Callback that runs after the scale fits to the canvas. Parameters: axis
callbackAfterupdate	function		Callback that runs at the end of the update process. Parameters: axis