These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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As opposed to the setExtremes event, this event fires after the
final min and max values are computed and corrected for minRange.
Fires when the minimum and maximum is set for the axis, either by
calling the .setExtremes() method or by selecting an area in the
chart. One parameter, event, is passed to the function, containing
common event information.
The new user set minimum and maximum values can be found by
event.min and event.max. These reflect the axis minimum and
maximum in axis values. The actual data extremes are found in
event.dataMin and event.dataMax.