Verify Mandatory Attachments Count on Catalog Item

Problem Statement: Need to check if exact 'n' number of attachments are added or not when user submit a request through service catalog from Portal/Native view.

I know, there are couple of questions regarding making number of attachments mandatory on Native UI and Service Portal; so thought of adding this in blog..

The below script would help achieving the same.

For example: You need to ensure there are exact 2 attachments added before submission

Script: onSubmit

Note: Ensure Isolate Script field is set to False for this Catalog Client Script to ensure DOM manipulation works

function onSubmit() {
    //Type appropriate comment here, and begin script below

var countRequired = 2;
    if(window == null){
        // portal
        if(this.document.getElementsByClassName('get-attachment').length != countRequired) {
            alert('You must add 2 attachments before submitting this request.');
            return false;
        }
    }
    else{
        // native view
         var length = $j("li.attachment_list_items").find("span").length;
        if(length != countRequired){
            alert('You must add 2 attachments before submitting this request.');
            return false;
        }
    }
}

Isolate Script: Set to False