https://checkout.anjuss.com.br/login/bundles/facebook?v=qHXad6rwxFWHaE1Nr28x5NM1MlRXlykZmkmcpdnUJd81

1function statusChangeCallback(n){console.log("statusChangeCallback");console.log(n);n.status==="connected"?FB.api("/me/permissions",function(t){const i=t.data.some(n=>n.permission==="email"&&n.status==="granted");i?fbits_login_facebook_auth(n):(hasAttemptedLogin=!0,window.alert("É necessário permitir o acesso ao seu email para continuar com o login."))}):window.alert("Não foi possível autenticar utilizando sua conta do Facebook.")}function fbits_login_facebook_auth(n){console.log("Fetching user information...");var t=$('input[name="returnUrl"]').val()||window.location.origin+"/MinhaConta/Dados";FB.api("/me",function(n){console.log("Successful login for: "+n.name)});$.post("/login/facebook/authenticate",{access_token:n.authResponse.accessToken,returnUrl:t},function(n){n.result==!0?window.location=n.returnUrl:window.alert=n.message})}function auth(n){fbits_login_facebook_auth(n)}(function(n,t,i){var r,u=n.getElementsByTagName(t)[0];n.getElementById(i)||(r=n.createElement(t),r.id=i,r.src="https://connect.facebook.net/en_US/sdk.js",u.parentNode.insertBefore(r,u))})(document,"script","facebook-jssdk");window.fbAsyncInit=function(){FB.init({appId:Fbits.Login.Facebook.AppId,cookie:!0,xfbml:!0,version:"v3.0"});FB.AppEvents.logPageView()};let hasAttemptedLogin=!1;$("#btnFacebook").click(function(){const n=hasAttemptedLogin?{scope:"public_profile,email",auth_type:"rerequest"}:{scope:"public_profile,email"};FB.login(function(n){statusChangeCallback(n)},n)})