Is it possible to set a variable for an input file element value, so it could further be assigned to another input?
This is, how it works with text inputs:
var tempValue = document.getElementById('text').value;
But no, it is impossible – value property of
input:file is read-only for security reasons – you can do it only on server-side.
To read contents of the file, you have to use
FileReader and specify how to read content (as plain text, as binary, or as a Blob) – example of reading as a Blob.