nullInteraction property

bool? nullInteraction
getter/setter pair

Whether or not data-points with the value of null should be interactive. When this is set to true, tooltips may highlight these points, and this option also enables keyboard navigation for such points. Format options for such points include nullFormat and nullFormater. Works for these series: line, spline, area, area-spline, column, bar, and* timeline.

API Docs: https://api.highcharts.com/highcharts/series.treegraph.nullInteraction

Implementation

bool? nullInteraction;