mapsLoader.status shows LoaderStatus.SUCCESS when incorrect API_KEY was provided or maps were not loaded correctly

[andylacko]

Steps to reproduce

• change API_KEY to something silly
• console.log({status: mapsLoader.status})

1. it is 1 as LoaderStatus.LOADING
2. it changes to LoaderStatus.SUCCESS

even if wrong API_KEY was provided

I can not get the information whether the maps fully loaded or there was an error ( MissingKeyMapError )

[usefulthink]

That the API itself can be successfully loaded with an invalid API key is somewhat by design.

The reason for this is that validation of the key will happen after the API has been loaded (I'm not 100% sure, but I think it will only run the check once you start using the API by e.g. loading a map or creating a service object). This is because the key can be configured to only be allowed to use the geocoding-API for example, so loading a map with that key will result in an error. Another reason is that the key might be restricted to certain paths within the site and that information cannot be determined on the server.

The only thing you can do is define a global function window.gm_authFailure that will get called if the API detects an authentication problem with the key.