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auth_facebook_callback.js
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auth_facebook_callback.js
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// This snippet file was generated by processing the source file:
// ./auth-next/facebook.js
//
// To update the snippets in this file, edit the source and then run
// 'npm run snippets'.
// [START auth_facebook_callback_modular]
import { getAuth, onAuthStateChanged, signInWithCredential, signOut, FacebookAuthProvider } from "firebase/auth";
const auth = getAuth();
function checkLoginState(response) {
if (response.authResponse) {
// User is signed-in Facebook.
const unsubscribe = onAuthStateChanged(auth, (firebaseUser) => {
unsubscribe();
// Check if we are already signed-in Firebase with the correct user.
if (!isUserEqual(response.authResponse, firebaseUser)) {
// Build Firebase credential with the Facebook auth token.
const credential = FacebookAuthProvider.credential(
response.authResponse.accessToken);
// Sign in with the credential from the Facebook user.
signInWithCredential(auth, credential)
.catch((error) => {
// Handle Errors here.
const errorCode = error.code;
const errorMessage = error.message;
// The email of the user's account used.
const email = error.customData.email;
// The AuthCredential type that was used.
const credential = FacebookAuthProvider.credentialFromError(error);
// ...
});
} else {
// User is already signed-in Firebase with the correct user.
}
});
} else {
// User is signed-out of Facebook.
signOut(auth);
}
}
// [END auth_facebook_callback_modular]