TileState
TileState:
"loading"
|"loaded"
|"reloading"
|"unloaded"
|"errored"
|"expired"
The tile's state, can be:
loading
Tile data is in the process of loading.loaded
Tile data has been loaded. Tile can be rendered.reloading
Tile data has been loaded and is being updated. Tile can be rendered.unloaded
Tile data has been deleted.errored
Tile data was not loaded because of an error.expired
Tile data was previously loaded, but has expired per its HTTP headers and is in the process of refreshing.