# Interface: DrilldownEventObject

## Highcharts. DrilldownEventObject

The event arguments when a drilldown point is clicked.

### Members

#### category :number|undefined

  If a category label was clicked, which index.

  ##### Type:

  - number | undefined

#### originalEvent :global.Event|undefined

  The original browser event (usually click) that triggered the drilldown.

  ##### Type:

  - global.Event | undefined

#### point :Highcharts.Point

  The originating point.

  ##### Type:

  - Highcharts.Point

#### points :boolean|Array.<Highcharts.Point>|undefined

  If a category label was clicked, this array holds all points corresponding to the category. Otherwise it is set to false.

  ##### Type:

  - boolean | Array.<Highcharts.Point> | undefined

#### preventDefault :function

  Prevents the default behavior of the event.

  ##### Type:

  - function

#### seriesOptions :Highcharts.SeriesOptionsType|undefined

  Options for the new series. If the event is utilized for async drilldown, the seriesOptions are not added, but rather loaded async.

  ##### Type:

  - Highcharts.SeriesOptionsType | undefined

#### target :Highcharts.Chart

  The event target.

  ##### Type:

  - Highcharts.Chart

#### type :"drilldown"

  The event type.

  ##### Type:

  - "drilldown"