These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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The width of the border surrounding each slice.
When setting the border width to 0, there may be small gaps between
the slices due to SVG antialiasing artefacts. To work around this,
keep the border width at 0.5 or 1, but set the borderColor
to
null
instead.
In styled mode, the border stroke width is given in the
.highcharts-point
class.