pekeUpload.files.length!='' ?

[Multi-Thinker]

In handleFormSubmission you have validate if condition with pekeUpload.files.length where length is integer and it can never be empty thus means your validation is not working because 0 is not empty Please update your code and add pekeUpload.files.length!='' && pekeUpload.files.length!=0.

on formSubmit = true has bugs if you keep your code length!='' because 0 is not empty as string when the form has no files files[pos] = null on success or user have not selected any files click on submit button will redirect user to (form action="page") action page.