Questions and discussion about using ProcessMaker: user interface, running cases & functionality

Moderators: ArturoRobles, ArturoRobles

I am trying to make file upload field mandatory using Javascript, i am trying the following code but it's not validating:
Code: Select all
function validate(){

    if($('#VATCertificate')[0].files.length === 0){
        alert("Attachment Required");

        return false;
Can someone help me with that ?
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