Highcharts: Get visibility of series after legendItemClick

Question

I have a chart with multiple series which I would like to modify the options of, if two of the series have been disabled by clicking on the legend.

The following won't work as visible has the value of the state before it was clicked. Is there another way to do what I am trying to accomplish below?

plotOptions: {
    series: {
        events: {
            legendItemClick: function(event) {
                if(this.yAxis.series[0].visible && this.yAxis.series[1].visible) {
                    // do some action
                }
            }
        }
    }
},

Answer 1

You can get this behavior a little modyfing your function:

plotOptions: {
  series: {
    events: {
      legendItemClick: function(event) {
          var series = this.yAxis.series,
              seriesLen = series.length,
              visible = this.visible ? 1 : -1; 
              // +1 when visible series, because it will be changed after that callback

          for(var i = 0; i < seriesLen; i++) {
            if(!series[i].visible) {
              visible++;
            }
          }
          if(visible >= 2){
            //do some action
          }
      }
    }
  }
},