Cookie Consent Simple Implementation?

const submitForm = (e) => {
    e.preventDefault();
    const cookieConsentForm = e.target;
    const formData = new FormData(cookieConsentForm);
    const action = cookieConsentForm.action = '/';
    fetch(cookieConsentForm.action, {
     method: 'POST',
     body: formData
    })
    // if the response is not a 200 OK, reject the promise
    .then(response => {
    if (!response.ok) {
     throw new Error('Network response was not ok');
     }
    // if the response is ok remove the cookie consent bar
     document.querySelector('.cookiebar').classList.add('remove');
    })
};

document.addEventListener('DOMContentLoaded', function() {
    let cookieConsentBar = document.querySelector('.cookiebar');
    let allForms = document.querySelectorAll('.cookieConsentForm');
    allForms.forEach(form => {
     form.addEventListener('submit', submitForm);
     // do ui stuff like set button to pointer events none + loading
     cookieConsentButton.addEventListener('click', function() {
      cookieConsentButton.classList.add('btn_loading');
     });
    });
});

console.log〈'i: Cookies: requested'〉;