Separate legends (including main axes) from marks. #299
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This allows to add a global color or radius legend to the plot as in https://observablehq.com/@data-workflows/plot-radiuslegend (ref #23 and #236).
Legends have the same signature as marks, but they receive only scales (index and channels are empty).
An issue is that the axes are below the marks, but I would tend to put the color and radius legends above them.
(I kept "unshift" to maintain the exact same order as in the test plots)