Firebase的FacebookAuthProvider.addScope做了什么？

Question

Firebase的FacebookAuthProvider.addScope做了什么？是否需要检索访问令牌？

Answer 1

这用于添加Facebook OAuth 2.0范围，例如：＆＃39; public_profile＆＃39;，＆＃39; email＆＃39;，＆＃39; user_likes＆＃39;，＆＃39; user_friends＆＃39;等 例如：

var provider = new firebase.auth.FacebookAuthProvider();
provider.addScope('user_friends');
provider.addScope('user_likes');
// This will open the Facebook sign in page and ask user to consent
// to the additional scopes.
firebase.auth().signInWithPopup(provider).then(function(result) {
  if (result.user) {
   // Additional user info like Facebook account url, gender, etc.
    console.log(result.additionalUserInfo.profile);
    // Facebook access token returned in the process
    // for the scopes requested.
    console.log(result.credential.accessToken);
  }
});