What are App Domains in Facebook Apps?

Question

I want to add the ability to \'login with Facebook\' to my site. But I am confused when I register my site in Facebook Apps. What should I input into App Domains

Answer 1

In this example:

http://www.example.com:80/somepage?parameter1="hello"¶meter2="world"

the bold part is the Domainname. 80 is rarely included. I post it since many people may wonder if 3000 or some other port is part of the domain if their not staging their app for production yet. Normally you don't specify it since 80 is the default, but if you just want to specify localhost just do it without the port number, it works just as fine. The adress, though, should be http://localhost:3000 (if you have it on that port).