# 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.areasplinerange.pointStart

If no x values are given for the points in a series, pointStart defines on what value to start. For example, if a series contains one yearly value starting from 1945, set pointStart to 1945.