# Welcome to the Highcharts Gantt JS (gantt) Options Reference

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

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# plotOptions.xrange

The X-range series displays ranges on the X axis, typically time intervals with a start and end date.

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 `xrange` series are defined in plotOptions.xrange.
3. Options for one single series are given in the series instance array.

    Highcharts.chart('container', {
        plotOptions: {
            series: {
                // general options for all series
            },
            xrange: {
                // shared options for all xrange series
            }
        },
        series: [{
            // specific options for this series instance
            type: 'xrange'
        }]
    });

TypeScript:

- type option should always be set, otherwise a broad set of unsupported options is allowed.
- 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 === xrange) {
        // code specific to the xrange series
    }