userInput.html

<input type="file" id="fs" multiple>

userInput.js

const fileSelect = document.getElementById('fs');
fileSelect.addEventListener('change', (event) => {
    const fileList = event.target.files;
    for (const file of fileList) {
        // Constructing Meta Data if support.
        const name = file.name ? file.name : 'NOT SUPPORTED';
        const type = file.type ? file.type : 'NOT SUPPORTED';
        const size = file.size ? `${file.size/1000} KB` : 'NOT SUPPORTED';
        // Log the filename/ type/ size in the browser console
        console.log({file, name, type, size});
        // Continue doing something with files...
    }
});