HTMLInputElement: files property

<input id="files" type="file" multiple />

const fileInput = document.getElementById("files");
console.log(fileInput.files instanceof FileList); // true even if empty
for (const file of fileInput.files) {
  console.log(file.name); // prints file name
  let fileDate = new Date(file.lastModified);
  console.log(fileDate.toLocaleDateString()); // prints legible date
  console.log(
    file.size < 1000 ? file.size : `${Math.round(file.size / 1000)}KB`,
  );
  console.log(file.type); // prints MIME type
}