jnpf-web-datareport/node_modules/chartjs-plugin-datalabels/docs/options.md

Options

The plugin options can be changed at 3 different levels and with the following priority:

• per dataset: dataset.datalabels.*
• per chart: options.plugins.datalabels.*
• globally: Chart.defaults.global.plugins.datalabels.*

Available options:

Name	Type	Scriptable	Indexable	Default
align	Number/String	Yes	Yes	'center'
anchor	String	Yes	Yes	'center'
backgroundColor	Style/null	Yes	Yes	null
borderColor	Style/null	Yes	Yes	null
borderRadius	Number	Yes	Yes	0
borderWidth	Number	Yes	Yes	0
color	Style	Yes	Yes	0
display	Boolean	Yes	Yes	true
font	Object	Yes	Yes	-
font.family	String	-	-	defaultFontFamily
font.size	String	-	-	defaultFontSize
font.style	String	-	-	defaultFontStyle
font.weight	String	-	-	'normal'
font.lineHeight	Number/String	-	-	1.2
listeners	Object	-	-	{}
offset	Number	Yes	Yes	4
opacity	Number	Yes	Yes	1
padding	Number/Object	Yes	Yes	-
padding.top	Number	-	-	4
padding.right	Number	-	-	4
padding.bottom	Number	-	-	4
padding.left	Number	-	-	4
rotation	Number	Yes	Yes	0
textAlign	String	Yes	Yes	start
formatter	Function/null	-	-	-

Scriptable Options

Scriptable options also accept a function which is called for each data and that takes the unique argument context representing contextual information (see option context).

Example:

color: function(context) {
    var index = context.dataIndex;
    var value = context.dataset.data[index];
    return value < 0 ? 'red' :  // draw negative values in red
        index % 2 ? 'blue' :    // else, alternate values in blue and green
        'green';
}

Option Context

The option context is used to give contextual information when resolving options. It mainly applies to scriptable options but also to some function options such as formatter.

The context object contains the following properties:

• active (bool): whether the associated element is hovered (see interactions)
• chart (Chart): the associated chart
• dataIndex (int): index of the associated data
• dataset (object): the dataset at index datasetIndex
• datasetIndex (int): index of the associated dataset

Indexable Options

Indexable options also accept an array in which each item corresponds to the element at the same index. Note that this method requires to provide as many items as data, so, in most cases, using a function is more appropriated.

Example:

color: [
    'red',    // color for data at index 0
    'blue',   // color for data at index 1
    'green',  // color for data at index 2
    'black',  // color for data at index 3
    //...
]

Style Options

Style options are usually inputs for fillStyle or strokeStyle.

The following values are supported:

• string parsed as CSS color value
• CanvasGradient object (linear or radial gradient)
• CanvasPattern object (a repetitive image)

Examples:

color: 'green'                  // named color
color: '#dc143c'                // HEX color
color: 'rgb(51, 170, 51)'       // RGB color (opaque)
color: 'rgba(51, 170, 51, .5)'  // RGBa color (semi-transparent)
// ...