What is the appropriate placement for setting Firebase auth state persistence in a Vue.js application?

Question

What is the appropriate placement for setting Firebase auth state persistence in a Vue.js application?

Welcome

Currently working on a web application using Quasar/Vue.js and Firebase that requires user authentication.

My Objective

I am aiming to implement a common feature - keeping users logged in even after they have closed the browser or tab.

Potential Solutions

While I am aware of the option to utilize localStorage or cookies for managing user authentication state, I am interested in exploring if Firebase auth can handle this task for me.

After reviewing the documentation at https://firebase.google.com/docs/auth/web/auth-state-persistence, I noted the code snippet provided:

firebase.auth().setPersistence(firebase.auth.Auth.Persistence.LOCAL)
  .then(function() {
    // The new sign-in will be persisted with session persistence.
    return firebase.auth().signInWithEmailAndPassword(email, password);
  })
  .catch(function(error) {
    // Handle any errors here.
    var errorCode = error.code;
    var errorMessage = error.message;
  });

However, I am uncertain about where to integrate this code snippet. Should it be placed within:

The onAuthStatechanged listener?
The App.vue (root Vue) instance?
Another location entirely?

Any guidance on this matter would be greatly appreciated. Thank you.

javascript firebase vue.js firebase-authentication

Answer 1

Answer №1

If you're wondering where to put firebase.initializeApp(), you can do it like this:

firebase.initializeApp({
  // configuration details here
});

export const auth = firebase.auth()

auth.setPersistence(firebase.auth.Auth.Persistence.LOCAL)

Just a reminder that LOCAL is the default for web applications.

You don't necessarily have to wait for the promise to resolve. As mentioned in the documentation:

This will return a promise that will resolve once the state finishes copying from one type of storage to the other. When you call a sign-in method after changing persistence, it will wait for the persistence change to complete before applying it to the new Auth state.

In the modular version (v9+) of this code snippet, it would appear as follows...

import { initializeApp } from "firebase/app";
import {
  browserLocalPersistence,
  getAuth, 
  setPersistence
} from "firebase/auth";

const app = initializeApp({
  // configuration details go here
})

export const auth = getAuth(app);

setPersistence(auth, browserLocalPersistence)

Answer 2

If you're wondering where to put firebase.initializeApp(), you can do it like this:

firebase.initializeApp({
  // configuration details here
});

export const auth = firebase.auth()

auth.setPersistence(firebase.auth.Auth.Persistence.LOCAL)

Just a reminder that LOCAL is the default for web applications.

You don't necessarily have to wait for the promise to resolve. As mentioned in the documentation:

This will return a promise that will resolve once the state finishes copying from one type of storage to the other. When you call a sign-in method after changing persistence, it will wait for the persistence change to complete before applying it to the new Auth state.

In the modular version (v9+) of this code snippet, it would appear as follows...

import { initializeApp } from "firebase/app";
import {
  browserLocalPersistence,
  getAuth, 
  setPersistence
} from "firebase/auth";

const app = initializeApp({
  // configuration details go here
})

export const auth = getAuth(app);

setPersistence(auth, browserLocalPersistence)

What is the appropriate placement for setting Firebase auth state persistence in a Vue.js application?

Welcome

My Objective

Potential Solutions

Answer №1

Similar questions

When updating a user profile on Angular, the application automatically redirects to the main page

Ensure that the click event is triggered only once for each distinct class

Checking the service callback function in an AngularJS controller test

Steps for storing API information in localStorage:1. Retrieve the API data

Establishing the controller to set the default order

First keystroke in React input field registers as an empty string in log

Looking for an improved, tidier, or more efficient alternative to PHP Random Text?

Error encountered when extending Typography variant in TypeScript with Material UI v5: "No overload matches this call"

Understanding the inner workings of a Mongoose model without the need for

The getMonthlyBalances function is providing inaccurate results when calculating stock balances

How to remove an event listener when e.target points to a hyperlink

Monitoring Twitter bootstrap modal for scrollbar reaching the bottom

Having trouble with the mongoose virtual field being undefined while using an arrow function?

Having issues with "return false" not functioning properly in jQuery ajax calls

Ensure that clicking on an element closes any currently visible elements before opening a new element

Determining if a user is already logged in from a different device using express-session

I currently have an array of strings and wish to print only the lines that include a specific substring

Eliminate the alert message that appears when dynamically rendering a React styled component

Adjust the spacing of a div based on the fluctuating height of another dynamically changing div

Retrieve a specific value in HTML <a> tag using JavaScript-Ajax in Django