Chrome doesn’t give any indication of JavaScript errors on a page unless you open the JavaScript Console to check. Is there any way to have an indication that there are errors? Check out other questions tagged Stack Overflow…. javascript google-chrome or ask your own question. October 27, 2021 · Google Maps JavaScript API alert: NoApiKeys; Google Maps JavaScript API error: MissingKeyMapError; For web developers: If you have access to the source code of your application, the Maps JavaScript API is used to load it.