JS API Reference

Welcome to the Highcharts Core JS (highcharts) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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plotOptions.spline

A spline series is a special type of line series, where the segments between the data points are smoothed.

Configuration options for the series are given in three levels:

  1. Options for all series in a chart are defined in the plotOptions.series object.
  2. Options for all spline series are defined in plotOptions.spline.
  3. Options for one single series are given in the series instance array.
Highcharts.chart('container', {
    plotOptions: {
        series: {
            // general options for all series
        },
        spline: {
            // shared options for all spline series
        }
    },
    series: [{
        // specific options for this series instance
        type: 'spline'
    }]
});

TypeScript:

  • the type option must always be set.
  • when accessing an array of series, the combined set of all series types is represented by Highcharts.SeriesOptionsType . Narrowing down to the specific type can be done by checking the type property.
if (chart.options.series?.[0]?.type === spline) {
    // code specific to the spline series
}

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Highcharts Core v12.4.0 - Generated from branch master (commit 271dfc62d7), on Thu Sep 04 2025 08:54:26 GMT+0200 (Central European Summer Time)