Area Chart in JavaScript Charts

18 Nov 20182 minutes to read

Area

To render an area series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

  • Set the series type: Define the series type as Area in your chart configuration. This indicates that the data should be represented as an area chart, which is ideal for showing trends over time or across categories, with filled areas beneath the lines representing data points.

Binding data with series

You can bind data to the chart using the dataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series xName and yName properties.

Series customization

The following properties can be used to customize the area series.

Fill

The fill property determines the color applied to the series.

The fill property can be used to apply a gradient color to the area series. By configuring this property with gradient values, you can create a visually appealing effect in which the color transitions smoothly from one shade to another.

Opacity

The opacity property controls the transparency of the fill and affects how the series blends with background or overlapping series.

Area border

Use the border property to configure the border width, color, and dasharray of the area series.

Multicolored area

To render a multicolored area series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

  • Set the series type: Define the series type as MultiColoredArea in your chart configuration. This specifies that the series should be rendered as a multicolored area chart, with different segments of the area having distinct colors.

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the mode property to control handling of empty points. Available modes: Gap, Drop, Zero, Average. The default mode is Gap.

Fill

Use the fill property to set the fill color for empty points.

Border

Use the border property to customize the border width and color for empty points.

Events

Series render

The seriesRender event enables modification of series properties (for example, data, fill, or name) immediately before rendering. Use this event to adjust series appearance or to dynamically swap data sources.

Point render

The pointRender event provides a hook to customize each data point (for example, marker shape, border, or fill) before it is drawn. Use this to apply per-point styling rules or conditional formatting.

See also