How to determine how many files are inside a folder when uploading?

Question

JavaScript

Hello! Wrote a simple file uploader for an example. When you throw a folder with files, how to count how many files are in this folder to show on the side of the folder name? For example: folder1 (3).
https://jsfiddle.net/176gsmf9/11/

Answer 1

https://developer.mozilla.org/en/docs/Web/API/File...
https://developer.mozilla.org/en/docs/Web/API/FileList
https://developer.mozilla.org /en/docs/Web/API/File
https://developer.mozilla.org/en-US/docs/Web/API/H...