In my app, users can fill a form (all kinds of inputs, including file inputs). At any point and after posting that form to backend, they can edit the form. In that case, the text/selects/numbers... are set to the value entered by the user previously.

What would the best practice be for file inputs ? I know I can't "preload" them for security reasons.

These files are stored on the backend. I need to find a way to figure out :

• If the user hasn't changed the file
• If the user has changed the file
• If the user wants to remove the existing file (if possible ?)