These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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A callback function returning array defining where the ticks are
laid out on the axis. This overrides the default behavior of
tickPixelInterval and tickInterval. The automatic tick positions are accessible
through this.tickPositions and can be modified by the callback.
Since v12.6.0, the callback also receives ctx as the third
argument, so that arrow functions can access the same context as
regular functions using this.