如何使用 Firebase Auth 向用户发送验证 email

Question

I want to send verification email to users who just signed up. I have been looking for a solution for this and thought I found one, but it didn't work. I checked out the Firebase Auth document and tried code on the page, but it also couldn't be the solution.

My code is below The "try" actually runs when pressing the sign-up button and I can see it. In the Firebase Auth console page, I can see the user just created but didn't get a verification email in the inbox.

  const handleSignup = async (email, pswd) => {
    try {
      await createUserWithEmailAndPassword(auth, email, pswd);
      setSignupEmail("");
      setSignupPassword("");
      setSignupPasswordAgain("");
      signOut(auth);
      sendEmailVerification(auth.currentUser);
      alert("Check your email for a verification link.");
    } catch (err) {
      console.log(err);
    }
  };

Answer 1

You call sendEmailVerification() after having called signOut() so auth.currentUser is null when you pass it to sendEmailVerification() . You should see an error logged in the catch block.

Moreover, both sendEmailVerification() and signOut() methods are asynchronous and return Promises.

The following should do the trick (untested):

  const handleSignup = async (email, pswd) => {
    try {
      await createUserWithEmailAndPassword(auth, email, pswd);
      setSignupEmail("");
      setSignupPassword("");
      setSignupPasswordAgain("");
      await sendEmailVerification(auth.currentUser);
      await signOut(auth);
      alert("Check your email for a verification link.");
    } catch (err) {
      console.log(err);
    }
  };