How to bind custom data in Highcharts?

Question

JavaScript

I have been working with Highcharts for quite a long time and every time I invent my own bike of data binding to series in order to use them somehow (for example, display them in a tooltip).

series: [{data : [{
  x: 5,
  y: 6,
  customData: 'Какие-то данные'
}]}]

But, in the end, no object (strings, numbers, etc.) passed under a non-standard key (in this case, customData) is found anywhere in the series object (neither in data nor in options)

chart.series[ 0 ].options.data[ 0 ] →
{
  x: 5,
  y: 6
}

The documentation is silent, or I am inattentive.

Answer 1

Your custom data (snap to a point) will be in

chart.series[0].points[0].customdata

Example: jsfiddle.net/dALDR/32/
If you need to bind custom data to a series of points, then the data will be here:

chart.series[0].options.customdata.somekey

Example: jsfiddle.net/dALDR/33/