voluptasmollitia/docs-exp/auth.getredirectresult.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [getRedirectResult](./auth.getredirectresult.md)

## getRedirectResult() function

Returns a [UserCredential](./auth.usercredential.md) from the redirect-based sign-in flow.

<b>Signature:</b>

```typescript
export declare function getRedirectResult(auth: Auth, resolver?: PopupRedirectResolver): Promise<UserCredential | null>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  auth | [Auth](./auth.auth.md) | The Auth instance. |
|  resolver | [PopupRedirectResolver](./auth.popupredirectresolver.md) | An instance of [PopupRedirectResolver](./auth.popupredirectresolver.md)<!-- -->, optional if already supplied to [initializeAuth()](./auth.initializeauth.md) or provided by [getAuth()](./auth.getauth.md)<!-- -->. |

<b>Returns:</b>

Promise&lt;[UserCredential](./auth.usercredential.md) \| null&gt;

## Remarks

If sign-in succeeded, returns the signed in user. If sign-in was unsuccessful, fails with an error. If no redirect operation was called, returns a [UserCredential](./auth.usercredential.md) with a null `user`<!-- -->.

## Example


```javascript
// Sign in using a redirect.
const provider = new FacebookAuthProvider();
// You can add additional scopes to the provider:
provider.addScope('user_birthday');
// Start a sign in process for an unauthenticated user.
await signInWithRedirect(auth, provider);
// This will trigger a full page redirect away from your app

// After returning from the redirect when your app initializes you can obtain the result
const result = await getRedirectResult(auth);
if (result) {
  // This is the signed-in user
  const user = result.user;
  // This gives you a Facebook Access Token.
  const credential = provider.credentialFromResult(auth, result);
  const token = credential.accessToken;
}
// As this API can be used for sign-in, linking and reauthentication,
// check the operationType to determine what triggered this redirect
// operation.
const operationType = result.operationType;

```