Question

I created a facebook login button from here:
http://developers.facebook.com/docs/reference/plugins/login/

and I have the following login button:

 <div class="fb-login-button" scope="email" data-show-faces="true" data-max-rows="3">Login with Facebook</div>

So, when the user accept the permissions, how can I get the user information (in this case the email)? (Using javazcript in client-side)

Answer 1

Similar to:

Get user’s Facebook UID with Javascript
but you will need to take this a little further and get their email by looking for email in the response object.

FB.api('/me', function(response) {
    var email = response.email;
});

However, your app will have to request this permission from your users, see Facebook documentation on permissions here: https://developers.facebook.com/docs/authentication/permissions/