Clear the file upload field in JS (input type = file)

The Value Attribute of the type = file field in the form cannot be attached to the value by JS. Once a file is selected, this value is retained if you do not manually clear it, the corresponding file is also submitted when the form is submitted. of course, it will be verified again on the server. However, to avoid uploading unnecessary files, it is necessary to clear the File Upload fields after the client verification fails in advance.
The specific method is to remove the file element from the Dom and add "Same Name and surname". Below is a section written based on jquery. Code
Function clearupload (){
$ ("# Fuimg"). Remove (); // remove the original
VaR upfile = $ ("<input/>"). ATTR ("name", "fuimg"). ATTR ("ID", "fuimg ");
Upfile. ATTR ("type", "file"). addclass ("w160 ");
Upfile. appendto ("# upload"); // Add a new
Upfile. Change (filechangehandle); // The binding process,
}