javascript source code of Login

import React, { useState, useContext } from 'react';
import styles from './../../common/styles/formStyles.module.css';
import commonStyle from './../../common/styles/styles.module.css';
import { firebaseApp } from '../../firebase/init';
import { getAuth } from 'firebase/auth';
import { Navigate, Link, useNavigate } from 'react-router-dom';
import { AuthContext } from '../../context/Auth';
import { Alert } from '../../common/alert/Alert';

const Login = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState(null);
  const [isLogging, setIsLogging] = useState(false);
  let navigate = useNavigate();

  function handleLogin() {
    if (!email || !password) {
      return setError('All fields are required');
    }
    setIsLogging(true);

    firebaseApp
      .auth()
      .signInWithEmailAndPassword(email, password)
      .then(() => {
        setIsLogging(false);
        navigate('/');
      })
      .catch((err) => {
        setError('Something wrong with your email or Password. Try again!');
        setIsLogging(false);
      });
  }

  function handleAlertClose() {
    setError('');
  }

  const { currentUser } = useContext(AuthContext);

  const handleGuestLogin = () => {
    setIsLogging(true);
    const auth = getAuth();
    firebaseApp
      .auth(auth)
      .signInAnonymously()
      .then(() => {
        setIsLogging(false);
        navigate('/');
      })
      .catch((err) => {
        setError('Something wrong with your email or Password. Try again!');
        setIsLogging(false);
      });
  };

  if (currentUser) {
    return <Navigate to="/" />;
  }

  return (
    <div className={styles.formContainer}>
      <div className={styles.formHeader}>Login</div>
      {error && (
        <Alert type="error" canClose={handleAlertClose}>
          {error}
        </Alert>
      )}
      <div className={styles.formGroup}>
        <label htmlFor="email">Email</label>
        <input
          type="email"
          name="email"
          id="email"
          value={email}
          onChange={(e) => setEmail(e.target.value)}
          placeholder="[email protected]"
        />
      </div>
      <div className={styles.formGroup}>
        <label htmlFor="password">Password</label>
        <input
          type="password"
          name="password"
          id="password"
          value={password}
          onChange={(e) => setPassword(e.target.value)}
          placeholder="******"
        />
      </div>
      <div className={styles.formGroup}>
        <button
          className={commonStyle.info}
          disabled={isLogging}
          onClick={handleLogin}
        >
          {isLogging ? 'Logging in..' : 'Login'}
        </button>
      </div>
      <div className={styles.meta}>
        Dont have an account? <Link to="/signup">Sign up</Link>.
      </div>
      <div className={styles.meta}>
        Just want to check the website?{' '}
        <button onClick={handleGuestLogin}>Continue as guest</button>
      </div>
    </div>
  );
};

export default Login;