Hovering on point with no data first renders glyph and tooltip outside chart

[mira-t]

When I have a point with a y value that is undefined (representing a data gap) and I hover over it without first hovering over other points (e.g. moving mouse in from under x axis to this point), the glyph and tooltip do this:

[mira-t]

This is an AnimatedLineSeries in an XYChart and I am using @visx/xychart@1.4.0

[williaster]

Hey @mira-t 👋 thanks for checking out visx. Can you explain more what you would expect to happen in this case? From a UX perspective it seems like the following would probably be most ideal:

• if x or y is defined, use that position
• if x or y is undefined, fallback to wherever the cursor or pointer event occurred

I think as a workaround for now you probably could set snapTooltipToDataY={false} on the Tooltip. That seems to work fine in the demo:

[mira-t]

Yes, when the x or y is undefined, I would expect the tooltip to fallback to wherever the cursor/pointer event occurred, but no glyph as there is no data.

I also noticed that the glyph only goes to the bottom of the svg if my mouse approaches the chart from below it. If the mouse was previously close to the points to the left or right of the gap it just uses that y-value instead.