How can the JavaScript code be modified to ensure that a file is uploaded along with the form data?

To ensure that a file is uploaded along with the form data in JavaScript, you can use the FormData object to append the file input element to the form data before sending it via an XMLHttpRequest. This will allow the file to be uploaded along with the rest of the form data. ```javascript // Get the form element and file input element var form = document.getElementById('yourFormId'); var fileInput = document.getElementById('yourFileInputId'); // Create a new FormData object var formData = new FormData(); // Append the file input element to the form data formData.append('file', fileInput.files[0]); // Append the rest of the form data to the form data new FormData(form).forEach(function(value, key){ formData.append(key, value); }); // Create a new XMLHttpRequest object var xhr = new XMLHttpRequest(); // Open a POST request to the server xhr.open('POST', 'upload.php', true); // Send the form data xhr.send(formData); ```