Function toggleSignIn

auth/facebook-popup.ts:36–71

* Function called when clicking the Login/Logout button.

()

 * Function called when clicking the Login/Logout button.
 */
function toggleSignIn() {
  if (!auth.currentUser) {
    const provider = new FacebookAuthProvider();
    provider.addScope('user_birthday');
    signInWithPopup(auth, provider)
      .then(function (result) {
        const credential = FacebookAuthProvider.credentialFromResult(result);
        // This gives you a Facebook Access Token. You can use it to access the Facebook API.
        const token = credential?.accessToken;
        // The signed-in user info.
        const user = result.user;
        oauthToken.textContent = token ?? 'null';
      })
      .catch(function (error) {
        // Handle Errors here.
        const errorCode = error.code;
        const errorMessage = error.message;
        // The email of the user's account used.
        const email = error.email;
        // The firebase.auth.AuthCredential type that was used.
        const credential = error.credential;
        if (errorCode === 'auth/account-exists-with-different-credential') {
          alert(
            'You have already signed up with a different auth provider for that email.',
          );
          // If you are using multiple auth providers on your app you should handle linking
          // the user's accounts here.
        } else {
          console.error(error);
        }
      });
  } else {
    signOut(auth);
  }
  signInButton.disabled = true;
}

// Listening for auth state changes.
onAuthStateChanged(auth, function (user) {