Googlemaps API Key for Localhost

1. Go to this address: https://console.developers.google.com/apis
2. Create new project and Create Credentials (API key)
3. Click on "Library"
4. Click on any API that you want
5. Click on "Enable"
6. Click on "Credentials" > "Edit Key"
7. Under "Application restrictions", select "HTTP referrers (web sites)"
8. Under "Website restrictions", Click on "ADD AN ITEM"
9. Type your website address (or "localhost", "127.0.0.1", "localhost:port" etc for local tests) in the text field and press ENTER to add it to the list
10. SAVE and Use your key in your project

You can follow this way. It works at least for me :

in Credential page :

1. Select option with IP address ( option no. 3 ).

2. Put your IP address from your provider. If you don't it, search your IP address by using this link : https://www.google.com/search?q=my+ip

3. Save it.

4. Change your google map link as follow between the scrip tag :

   https://maps.googleapis.com/maps/api/js?libraries=places&key=AIzxxxxxxxx"

5. Wait for about 5 minutes or more to let your API key to propagate.

Now your google map should works.

If you are working on localhost, create a separate APIkey for your development and then remove restrictions on that key so that your localhost can use it. Remember to not use this key on production, so you don't expose your key to hunters online.

I had the same issue and all attempts to get the restrictions working on my localhost environment was not successful until I created a separate apikey specifically for development and then removed its restrictions. However I don't use that key on production environment, and once am done with developments, I will delete the API key immediately.

I Know this post is late, but for people that will likely face this issue in the future, this is the best route to go.