Function isChartEmpty not able to handle nulls in dataset.

[Telchii]

The function isChartEmpty throws a type error when validating data that has gaps, or, null values. The error originates during the first filter of isChartEmpty, TypeError: Cannot read property 'X' of null. The data I'm using is a mix of integers and null values. e.g., [3, 6, null, 12].

Null data means no data, right? Not necessarily. Null is a proper way to represent a gap in the data.
For example, showing run times for a given task. If a point does not have a time value, a value of zero would indicate that the given task took literally no time. Null would indicate that the task did not finish, resulting in a gap in the data.

I'm not sure what Chart.js supported when this plugin was created, but Chart.js currently allows gaps during rendering when a specific property is set. (see Dataset Properties -> spanGaps) Even if spanGaps is not enabled, Chart.js will attempt to skip gaps, effectively merging data around a given gap.

So my bug report-slash-feature request is gap support. If the spanGaps property is set in the Chart.js config (globally or on an individual dataset), allow nulls in the data.