Bug: Passing Line Chart null value(s) hides entire 'label' tooltip

In 1.0, if you passed multiple data-points to a Line Chart but included a null value, a label tooltip would still display if any other numeric data-point was hovered (simply removing the null data-point from the multi-tooltip).

In 2.0, one or more null values hides the entire label tooltip, even if there are one or more numeric values and one of those data-points is hovered.

I already have a fix for this on my local project (checking the meta data for the skip flag before adding an element to the returned getElementsAtEvent() array), but wanted to make sure this wasn't intended functionality before I made a PR.

Thanks!

[etimberg]

@adamtLICOR I do not think this is intended behaviour. In my mind we should either eliminate the row represented by the null data or show the row with nothing for the value.

@etimberg: Well, in my particular use-case, removing the row is desirable.

This chart has four datasets -- when all four are present, the tooltip displays as normal.

If a dataset has a null value, it just doesn't show it in the tooltip (or technically 'select' it from the hover state, but that's a moot point since it's invisible)

If this is sufficient, I'll make another PR when I get the chance. My fix only works for label and the newly added x-axis tooltip options. I looked into fixing dataset briefly, but wasn't able, as it's significantly different from the first two options (and it isn't required by my particular use-case).

[etimberg]

I support removing the row. I think in most (>90%) of cases this is what users will expect. Please PR these changes 😄

[Regaddi]

How's the progress on this issue?

There's a PR open for it right now, actually. Not sure what else (if anything) needs to be done

[etimberg]

@adamtLICOR @Regaddi merged the PR

[pisfly]

Is this one only solves line chart? I have same issue for bar chart with v2.3.0