# JS API Reference

# Welcome to the Highcharts JS Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# series.boxplot.stemWidth

The width of the stem, the vertical line extending from the box to the whiskers. If `undefined`, the width is inherited from the lineWidth option.

In styled mode, the stem stroke width can be set with the `.highcharts-boxplot-stem` class.