# 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.

# chart.parallelAxes.categories

If categories are present for the xAxis, names are used instead of numbers for that axis.

Since Highcharts 3.0, categories can also be extracted by giving each point a name and setting axis type to `category`. However, if you have multiple series, best practice remains defining the `categories` array.

Example: `categories: ['Apples', 'Bananas', 'Oranges']`