Determine if Google Maps API is using an invalid key during runtime

Question

I\'m looking for a way to determine whether a valid Google maps API key is being used. Using an invalid key, we receive an error stating that the google API has been disable

Answer 1

Well there's something i found in Web > Maps JavaScript API > Events under title "Listening for authentication errors"

If you want to programmatically detect an authentication failure (for example to automatically send an beacon) you can prepare a callback function. If the following global function is defined it will be called when the authentication fails.

so you just need to define a global function:

function gm_authFailure() { /* Code */ };