Reported with a screenshot: the map came up with API KEY REQUIRED written
twice across the middle of it, on the Light and Voyager views only. Those
are exactly the two Carto basemaps.
Nothing here could have caught it. The tiles still answer 200 with a real
image — the watermark is IN the image — so the map looks like it is
working and simply says otherwise in large grey letters.
Both views move to Esri, which is already behind Street and Satellite. That
is the point: a second key-free provider is a second chance to be cut off,
and this is now the third time a tile source has changed its terms under
us. Light is Esri's light canvas with its own label layer, and Voyager
becomes the topographic map, labelled Topo — the stored key stays
'voyager' so nobody who chose it is quietly moved somewhere else.
The canvas runs out of tiles at zoom 16 where the others go to 19, so
maxNativeZoom is set per basemap: Leaflet upscales the last real tile
instead of asking for a level that does not exist, which is the difference
between a slightly soft map and a blank grey square.
rouggy
37b436f543