如何创建Firebase web user.reauthenticate（）方法所需的“凭证”对象？

Question

var user = firebase.auth().currentUser;
var credential;
// Prompt the user to re-provide their sign-in credentials
user.reauthenticate(credential).then(function() {

With the v3 Firebase client, how should I create this credential object for Google auth provider (Not email & Password).

How to do it with email and password was answered here: Email&Password .

I've tried var credential = firebase.auth.GoogleAuthProvider.credential(); but according to the docs it's needs an "Google Id Token" which I have no idea how to get.

Answer 1

You can create an AuthCredential by using firebase.auth.EmailAuthProvider.credential .

Then you can reauthenticate with firebase.User.reauthenticateWithCredential .

var user = firebase.auth().currentUser;
var credential = firebase.auth.EmailAuthProvider.credential(
  user.email,
  'yourpassword'
);
user.reauthenticateWithCredential(credential);

Answer 2

You can reauthenticate users that use GooglaAuth Provider without tokens and credentials using reauthenticateWithPopup(provider) or reauthenticateWithRedirect(provider) method:

// Create provider as usual
function createGoogleProvider() {
  const provider = new auth.GoogleAuthProvider()
  provider.addScope('profile')
  provider.addScope('email')
  return provider
}
// Reauthenticate with popup:
user.reauthenticateWithPopup(createGoogleProvider()).then(function(result) {
  // The firebase.User instance:
  var user = result.user;
}, function(error) {
  // An error happened.
});