JavaScript File Upload using Fetch API and FormData

// Get the file input element
const fileInput = document.querySelector('#file-input');

// Add an event listener for the 'change' event on the file input
fileInput.addEventListener('change', (event) => {
    // Get the selected file
    const file = event.target.files[0];

    // Create a FormData object and append the file to it
    const formData = new FormData();
    formData.append('file', file);

    // Use the Fetch API to send a POST request with the file data
    fetch('/upload', { method: 'POST', body: formData });
});