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Why doesn't firebase function work outside event listener?

loginForm.addEventListener('submit', (e) => {
    e.preventDefault();

    const email = loginForm.email.value;
    const password = loginForm.password.value;

    firebase.auth().signInWithEmailAndPassword(email, password)
    .then((user) => {
        console.log('logged in', user);
        loginForm.reset();
    })
    .catch((error) => {
        loginForm.querySelector('.error').textContent = error.message;
    });
});

Here firebase function works but when I type this it suddenly says that firebase is undefined. Thanks in advance!

firebase.auth().onAuthStateChanged((user) => {
    if (user) {
           authWrapper.classList.remove('open');
           authModals.forEach(modal => modal.classList.remove('active'));
    } else {
           authWrapper.classList.add('open');
           authModals[0].classList.add('active');
        }
}).then((user) => {
    window.location.href = "Ucionica.html";
});

about 4 years ago · Juan Pablo Isaza
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