Unexpected value NaN parsing y1 attribute.

[WURMiL]

null value for Y axis (hole in data) in combination with time series and Chartist.Interpolation.step() produces unexpected behavior:

[Arantiryo]

Hello @WURMiL 👋

Chartist has recently been updated to version 1.0 with some new exciting changes like ESM and TypeScript support. The migration guide can be found right here.

Please let me know if the issue is still relevant to you so we can further investigate it!