Adding to global variable in javascript function returns NaN

Question

I am trying to add to a global variable in order to determine total file size from an ajaxfileupload. I've tried the two ways below but attachmentSize keeps returning NaN. I've tried an if statement that checks for isNaN false, but variable still set to NaN.

var attachmentSize;
function onUploadComplete(sender, args) {
    attachmentSize += args.get_fileSize();
    attachmentSize = attachmentSize + args.get_fileSize();
}

`attachmentSize` is not initialized... initialize it to 0 – kukkuz Oct 12 '16 at 15:34 — kukkuz, Oct 12 '16 at 15:34
Thanks! I knew it was something simple I was missing, – KFP Oct 12 '16 at 15:37 — KFP, Oct 12 '16 at 15:37
great! have posted it as an answer :) – kukkuz Oct 12 '16 at 15:41 — kukkuz, Oct 12 '16 at 15:41

score 2 · Answer 1 · answered Oct 12 '16 at 15:41

Initialize attachmentSize to a number (say 0).

Also, if you expect args.get_fileSize() to be a string (and not a number), then you can use parseInt or parseFloat:

var attachmentSize = 0;
function onUploadComplete(sender, args) {
    attachmentSize += parseFloat(args.get_fileSize());
    attachmentSize = attachmentSize + parseFloat(args.get_fileSize());
}

Cheers!

Adding to global variable in javascript function returns NaN

1 Answers1