Function handleSignIn

auth/email-link.ts:94–135

* Handles automatically signing-in the app if we clicked on the sign-in link in the email.

()

 * Handles automatically signing-in the app if we clicked on the sign-in link in the email.
 */
function handleSignIn() {
  if (isSignInWithEmailLink(auth, window.location.href)) {
    // Disable the sign-in button during async sign-in tasks.
    signInButton.disabled = true;

    // You can also get the other parameters passed in the query string such as state=STATE.
    // Get the email if available.
    let email = window.localStorage.getItem('emailForSignIn');
    if (!email) {
      // User opened the link on a different device. To prevent session fixation attacks, ask the
      // user to provide the associated email again. For example:
      email = window.prompt(
        "Please provide the email you'd like to sign-in with for confirmation.",
      );
    }
    if (email) {
      // The client SDK will parse the code from the link for you.
      signInWithEmailLink(auth, email, window.location.href)
        .then(function (result) {
          // Clear the URL to remove the sign-in link parameters.
          window.history.replaceState(
            {},
            document.title,
            window.location.href.split('?')[0],
          );
          // Clear email from storage.
          window.localStorage.removeItem('emailForSignIn');
          // Signed-in user's information.
          const user = result.user;
          const additionalUserInfo = getAdditionalUserInfo(result);
          const isNewUser = additionalUserInfo?.isNewUser;
          console.log(result);
        })
        .catch(function (error) {
          // Handle Errors here.
          const errorCode = error.code;
          const errorMessage = error.message;
          handleError(error);
        });
    }
  }
}

// Restore the previously used value of the email.
const email = window.localStorage.getItem('emailForSignIn');