Add a File (JS object) to input type=“file”

Question

I need a way to add a File object to a file input field.

Note that I do not want to set the value of the file field. (which is a security risk, ...

Answer 1

No, you can't.

Taken from here:

It seems like you want to take the File object from the drop event and assign it to the element. Unfortunately, you can't do that. Only the user can select files; you can't dynamically change the files which will be uploaded because browsers deny JavaScript this ability for security reasons.