# 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.sunburst.levelSize.unit

How to interpret `levelSize.value`.

- `percentage` gives a width relative to result of outer radius minus inner radius.

- `pixels` gives the ring a fixed width in pixels.

- `weight` takes the remaining width after percentage and pixels, and distributes it accross all "weighted" levels. The value relative to the sum of all weights determines the width.