FormData in IE 11 not defined

Question

I have the following script to get the file data from a input type of file:

var uploadfiles = $(\"#upFile\").get(0);
var uploadedfiles = uploadfiles.files;

         


        

Answer 1

After checking docmode in IE developer tools it turned out it was reverted to 9 for some reason, had an older meta tag for X-UA-Compatible on my master page which I changed to:

And FormData had no problems at all.