Elm-Vega Fill and Stroke Tests

Default Chart

Default chart with only color specified.

Fill Encodings

Fill channel, but empty (should be hollow circles)
Ordinal fill
Red fill

Stroke Encodings

Stroke channel but empty (empty circles, default stroke color)
Ordinal stroke
Red stroke

Combined Fill and Stroke Encodings

Default fill and stroke (should be empty circles with default stroke color)
Ordinal stroke and red fill
Red stroke and ordinal fill

GeoJson with combined line and polygon features

Default with no separate fill and stroke results in treating line as polygon
Separate fill and stroke for line and area features

Source