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.
In
handleFormSubmissionyou have validate if condition withpekeUpload.files.lengthwhere 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 addpekeUpload.files.length!='' && pekeUpload.files.length!=0.on
formSubmit = truehas bugs if you keep your codelength!=''because0is not empty as string when the form has no filesfiles[pos] = nullon success or user have not selected any files click on submit button will redirect user to (formaction="page") action page.