HTMLInputElement: files property

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

const fileInput = document.getElementById("files");

console.log(fileInput.files instanceof FileList); //  .

for (const file of fileInput.files) {
  console.log(file.name); //   
  let fileDate = new Date(file.lastModified);
  console.log(fileDate.toLocaleDateString()); //    
  console.log(
    file.size < 1000 ? file.size : Math.round(file.size / 1000) + "KB",
  );
  console.log(file.type); // MIME  
}