# 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.funnel3d.neckWidth

The width of the neck, the lower part of the funnel. A number defines pixel width, a percentage string defines a percentage of the plot area width.