Formdata: Usage of the FormData object

formdata-usage.js

const newsletterForm = document.getElementById('newsletter-form');
newsletterForm.addEventListener('submit', () => {
    const formData = new FormData(newsletterForm);

    const name = formData.get('name');

    // Append timestamp
    formData.append('timestamp', Date.now().toString());

    // Delete timestamp
    formData.delete('timestamp');

    // Set name
    formData.set('name', 'John Doe');

    // Loop through formData
    for (const [key, value] of formData) {
        console.log(key, value);
    }
});