Apply conditional labels
- Label data: The data for airport labels comes from the
reffield contains short identifier codes for many airports, but not all airports. Read more about Mapbox Streets in the vector tile documentation.
- Styling with expressions: In this example, the airport labels are styled using property expressions to style features using a data condition. Open the
airport-labellayer to see how to check whether a data property exists (in this case the
refproperty). If the property does exist, the label displays the full name (
name) along with the
ref. If the
refproperty does not exist, the label displays the
namevalue. Read more about styling with data conditions in the Mapbox Style Specification.
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