Errorbars on scatter plots don't react to point selection

If you make a plot with errorbars, they aren't affected at all by selections. This both looks weird (like part of your point was left behind when it became deselected) and can cause usability problems, in that it's harder to distinguish selected and unselected points, particularly if the points themselves are small.

The simple solution here would be to include the errorbars in the group that responds to marker.opacity. That also seems the most correct, as you shouldn't see an errorbar through a partially transparent marker, and intuitively I'd expect errorbars to become transparent along with their associated markers. I think that would cover most use cases, though including some errorbar attributes like color and thickness in the selected and unselected styles would also be nice.

A tricky bit here is that normally errorbars are drawn behind lines but markers are in front of lines, so they can't just be combined with the markers. I suspect the right solution is to only put them behind the lines when there are no markers, but when there are markers bring them up to just behind and grouped with each marker.

Relatedly, no errorbar attributes other than array and arrayminus accept arrays. Enabling color in particular to be an array would be useful, and could mostly work around the main issue here in some cases, though I wouldn't call it a full solution.

https://codepen.io/alexcjohnson/pen/RNbGamp?editors=0010

To be clear: I don't think we should select the errorbars themselves - just select the points and bring the errorbars along for the ride.

Interestingly, errorbars on bar charts already behave correctly:

从链接的 CodePen 复现开始，检查散点图误差条在选择数据点时相对于标记和线条是如何渲染的。将其行为与柱状图中的误差条进行比较，然后确认选择数据点也会改变关联的误差条，而不会独立选择误差条。