Firebase - how to get user data by reading a token from LocalStorage?

Question

JavaScript

There is a token in LocalStorage

const token = await firebase.auth().currentUser.getIdToken()
localStorage.setItem('token', token)

Reloaded the page, read the token.
How to check that the token is valid now?
How to upload user data?

Answer 1

Here is what I found for your question
so when you get a token you need to remember the time and check if its time has expired the next time you use it.
And here I found more material on how to get user data
https://firebase.google.com/docs/auth/web/manage-users

var user = firebase.auth().currentUser;
var name, email, photoUrl, uid, emailVerified;

if (user != null) {
  name = user.displayName;
  email = user.email;
  photoUrl = user.photoURL;
  emailVerified = user.emailVerified;
  uid = user.uid;  // The user's ID, unique to the Firebase project. Do NOT use
                   // this value to authenticate with your backend server, if
                   // you have one. Use User.getToken() instead.
}

Answer 2

LocalStorage.getItem('token');