[Accessibility] Device Dependent handlers are used. Tooltips are not accessible with keyboard.

[puneet-ahuja]

Tooltips in the charts are not accessible with the help of a keyboard.

Steps to replicate:

Open the Codesandbox Link.

The above link opens an interactive multi-line chart.
We can access the tooltips on the lines using mouse hover but not with keyboards.

[domoritz]

Yes, that's an issue. The tricky thing is that we don't always have navigable elements since Vega can render to Canvas. So this may not be something that can be solved in general but we should look into having keyboard navigation with the SVG renderer at least.

For Canvas, we could suggest people use something like https://github.com/cmudig/data-navigator (cc @frankelavsky).