# 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.funnel3d.data.gradientForSides

By deafult sides fill is set to a gradient through this option being set to `true`. Set to `false` to get solid color for the sides.