# 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.item.states.hover.halo

Options for the halo appearing around the hovered point in line-type series as well as outside the hovered slice in pie charts. By default the halo is filled by the current point or series color with an opacity of 0.25. The halo can be disabled by setting the `halo` option to `null`.

In styled mode, the halo is styled with the `.highcharts-halo` class, with colors inherited from `.highcharts-color-{n}`.