4.10.0

New

• Choropleth maps can now mix a small set of categorical exceptions into an otherwise numeric classification, via categoryFillStyle/categoryText. Useful when a handful of regions have no meaningful numeric value for a metric (e.g. "no railway lines" on a map of electrification rate) but still deserve their own legend entry and colour, instead of being lumped into the generic "no data" class or forced into a second base layer (mixing two base layers, e.g. a categorical layer on top of a choropleth, is rejected - a region can only be classified by one base layer). Regions whose raw stat value matches a configured key get their own fill colour, legend swatch, and tooltip label instead of numeric classification or default no-data treatment.

Example:

eurostatmap
    .map('ch')
    .categoryFillStyle({ '-': '#cccccc' })
    .categoryText({ '-': 'No railway lines' })
    .build()