# 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.

# plotOptions.treemap.levels.borderDashStyle

Set the dash style of the border of all the point which lies on the level. See plotOptions.scatter.dashStyle for possible options.