danh
2020-11-30 13:40:32
As written, the "Signed Up" alert runs immediately, before the createUser is complete, whether or not it succeeds. The way to use promises is to put the code that should execute after successful completion in a then block, and the error handling -- as you have it -- in a catch...
const promise = auth.createUserWithEmailAndPassword(email.value, password.value);
promise.then(() => alert("Signed Up")).catch(e => alert(e.message));