Add error data to onMapLoadingError() TypeScript definition.

[nick-alekhine-cruise]

Hey there! The app I'm working on is trying to surface friendly error messages to our users in the event that the Mapbox API starts failing.

We've hooked into onMapLoadingError() and that's working great, but we don't get any information about the type of error that's getting triggered. For our use case, we want to know if this callback is getting called when the SDK throws a Failed to load tile error message.

It looks like error messages are already getting captured and emitted in both the Swift and Kotlin implementations. It also seems like we already have access to the error data in the callback. Adding an argument to the function and making the vector tiles API error out does emit this in our React Native logs:

{"error": "Failed to load tile: HTTP status code 500", "sourceId": "composite", "tileId": "x:1870 y:3373 z:13"}

onMapLoadingError={(error) => {
  console.log(error);
})

Is adding this to the TypeScript types on the roadmap? This enhancement would be great to have 🙏